Linux Trafgen Example

Linux Trafgen ExampleA tool for the generation of realistic network workload for. Let trafgen be more talkative and let it print the parsed configuration and some ring buffer statistics. It has a powerful packet configuration language, which is rather low-level and not. trafgen, a multithreaded low-level zero-copy network packet generator; It can craft nearly every possible or impossible packet. dat Alternatively if you want to saturate your network you can set up a connection that will flood A's and B's between each other on computer A. trafgen is a fast, zero-copy network traffic generator for debugging, performance evalua‐ tion, and fuzz-testing. EXAMPLES Generate traffic defined in trafgen. The AXI Traffic Generator IP is designed to. With the help of interval expression, we are able to find the. embeddedsw/xtrafgen_master_streaming_example. The 40 Simple Yet Effective Linux Shell Script Examples. Simply add the option “-r” before the source path. axi-traffic-gen/driver/master_ram. by using jperf, also we use trafgen to investigate jitter, delay and drops by . This example demonstrates how to use the Static mode in this driver. It is a tool under linux. When specifying multiple characters/bytes/fields, the cut command concatenates the output without a delimiter. The installation can be completed through the online installation tool of the system, such as centos Configuration file interpretation (take the synflood. The example configuration is passed via stdin and also through the C preprocessor before trafgen's packet compiler will see it. There are three ways of changing character case with tr: 1. txt /src/ /dst/ rsync gives us some statistics about our file transfer when we use the -P option, as shown in a previous example. Tar Commands in Linux; Useful Examples of Tar Command in Linux. config XILINX_TRAFGEN tristate "Xilinx Traffic Generator" help This option enables support for the Xilinx Traffic Generator driver. To demonstrate sorting by months, create a file populated by the ls command output: ls -l > month-sorting. Design Example Directory Structure 3. Context Check Description; netdev/tree_selection: success Clearly marked for net-next netdev/fixes_present: success Fixes tag not required for -next series. trafgen -e, the built-in example already has a TCP SYN packet with dynamic elemets in it. 15 Super Useful Examples of Find Command in Linux. Compiling the Example Design in Intel® Quartus® Prime 3. Examples of using field offset (showing the effect in a shortenet output from netsniff-ng): 1) trafgen -o lo --cpus 1 -n 3 '{ eth(da=11:22:33:44:55:66, da[0]=dinc()), tcp() }' [ Eth MAC (00:00:00:00:00:00 => 11:22:33:44:55:66) [ Eth MAC (00:00:00:00:00:00 => 12:22:33:44:55:66) [ Eth MAC (00:00:00:00:00:00 => 13:22:33:44:55:66) 2) trafgen -o lo --cpus 1 -n 3 '{ ipv4(da=1. This command will run a search in the current directory and its subdirectories to find a file (not directory) named myfile. If no directory is specified, the dir command will list the contents of the current working directory. In Static mode the core continuously generates fixed address and fixed INCR type read and write transfers based on the burst length configured. it could lead to starvation of other processes, for example low priority kernel. For testing purposes local traffic was generated using trafgen for the client and netcat to start a server example output from nstat: \~# nstat -a | grep InMac. The default setting for the Linux ln command is to create hard links. trafgen is a fast, zero-copy network traffic generator for debugging, performance evaluation, and fuzz-testing. 5 Go for simplicity, Try netcat. gencfg - A trafgen configuration generation and syntax testing tool Generate premade and customizable packet generations Apply byte separators to test syntax after changes to the lex parser Convert input file to trafgen packet configuration Todo (not ranked) [ DONE ]: More packet configs Fix endwhite separator, now noendwhite. Examples of Linux Regular Expression. The following example will only transfer files that are below 500 KB in size. netsniff-ng is a free Linux networking toolkit, a Swiss army knife for your daily Linux network plumbing if you will. -e, --example Show a built-in packet configuration example. Examples of using field offset (showing the effect in a shortenet output from netsniff-ng): 1) trafgen -o lo --cpus 1 -n 3 '{ eth(da=11:22:33:44:55:66, da[0]=dinc()), tcp() }' [ Eth MAC (00:00:00:00:00:00 => 11:22:33:44:55:66) [ Eth MAC (00:00:00:00:00:00 => 12:22:33:44:55:66) [ Eth MAC (00:00:00:00:00:00 => 13:22:33:44:55:66) 2) trafgen -o lo --cpus 1 -n 3 '{ ipv4(da=1. trafgen requires a packet configuration file which defines the characteristic of the network protocol packets to generate. trafgen(8): a fast multithreaded. The tr command is piped with the echo command and lowercase "ost" is. com/docs/linux/man/8-trafgen/" h="ID=SERP,6289. The first part of the code is ‘rw-‘. Most Useful Options: verbose or -v : This option will help you to know which file is linked to which file. Flowgrind has a distributed architecture. The below example demonstrates how to receive two numbers as input from the user and add them. The option -type f asks it to look for files only. Useful Examples of Tar Command in Linux In this section, we will explain different examples which are very useful to know more about Tar. sth like this ( off top of head ). cfg --out eth1 --rand Download two trafgen configuration files and generate the traffic. Example 1 - Translate with tr command. Thus, it can be used, for example, to test network behaviour under strange circumstances. The format for the command is as follows: For example, in the code below a hard link is created for a video file ( video. To navigate example directory we have used command cd Documents/geeksforgeeks/example. An example usage case is provided below to test RAMs. When SET2 is used the sequence of the character specified in SET1 is replaced with SET2. Below are examples of using the tr command with different options to transform input text. Basically, ln command is used to create hard links and soft links for files in Linux. trafgen template, trafgen generates specific data packets through this file! Look at the. For example, to set the output delimiter to _ (underscore), use: cut employees. c Contains an example on how to use the XTrafgen driver directly. The tr command in UNIX is a command line utility for translating or deleting characters. use trafgen to generate UDP packets on S1. trafgen --dev eth0 --conf trafgen. 0, also supports the zero-copy. Write the single packet to disk and then convert it to a trafgen configuration. echo "GNU \ Linux" | tr -s ' ' '_' GNU_\_Linux The -t (--truncate-set1) option forces tr to truncate SET1 to the length of SET2 before doing further processing. trafgen, a multithreaded low-level zero-copy network packet generator; mausezahn, high-level packet generator for HW/SW appliances with Cisco-CLI* bpfc, a Berkeley Packet Filter compiler, Linux BPF JIT disassembler; ifpps, a top-like kernel networking statistics tool; flowtop, a top-like netfilter connection tracking tool. Its gain of performance is reached by zero-copy mechanisms for network packets (RX_RING, TX_RING), so that the Linux kernel does not need to copy packets from kernel space to user space via system calls such as recvmsg(). The default behavior is to sort the output in alphabetical order. DESCRIPTION. On Gigabit Ethernet, trafgen has a comparable performance to pktgen, the built-in Linux kernel traffic generator, except that trafgen is more flexible in terms of packet configuration possibilities. We currently support FreeBSD 4. Example 7: Sort by Months. For example, D-ITG [5, 8, 9, 16, 18] is such a tool uses the encrypted format and requires the Linux. tar command to list the contents of archive without extracting. It is a user space application running on the top Linux operating system As traffic generator Mausezahn is for example used test IP . 2 Things to do before you run any linux jobs on the nodes. Example #3. pdfThis talk will cover internals of the PF_PACKET socket in the Linux kernel, . You can also convert tabs to spaces in Linux the same way. Alternatlvely user can create bin files of their respective sizes (Master RAM -8K size) and then write directly to Master RAM from the linux prompt, Bin files can be easily. Situation: My code is basically hacked into a driver of the Linux Kernel. trafgen(8) [debian. Basically, ln command is used to create hard links and soft links for files in Linux. Implement trafgen with how-to, Q&A, fixes, code snippets. #!/bin/bash read n if [ $n -lt 10 ]; then echo "It is a one digit number" else echo "It is a two digit number" fi The else part needs to be placed after the action part of if and before fi. The above code will only run if you insert the code below. c Contains an example on how to use the XTrafgen. 2 days ago · 3) Find a file with name from a directory. We'll set the byte size to match that to avoid conversion issues and then add a couple other commands. OPTIONS trafgen --dev eth0 --conf trafgen. scp Desktop /sample_example. Else, if it were a directory, d would have been shown. Once the operation is complete, you’ll be able to find copies of all the files and sub-directories of “directory” on the host in the path “path/to/directory”. The client is where you issue the bandwidth test parameters, and connect to a remote server. Examples of using field offset (showing the effect in a shortenet output from netsniff-ng): 1) trafgen -o lo --cpus 1 -n 3 '{ eth(da=11:22:33:44:55:66, da[0]=dinc()), tcp() }' [ Eth MAC. In the following example, tr removes the repeated space characters: echo "GNU \ Linux" | tr -s ' '. To send a packet, the user fills a data buffer of an available frame, sets tp_len to current data buffer size and sets its status field. cd ~ : this command is used to change directory to the home directory. Linux Regular Expression – Interval. A simple example is shown below. For testing purposes local traffic was. Write function to check for trafgen and netsniff-ng; Add NST packet configs. txt | tr [:lower:] [:upper:] LINUX IS MY LIFE LINUX HAS CHANGED MY LIFE LINUX IS BEST AND EVERTHING TO ME. you build the simulation, make will descend into trafgen/ and router/, run make in both, . 11 frames (yes, also works with. gencfg - A trafgen configuration generation and syntax testing tool. First, get the IP address of the new server container ypu just started: docker inspect --format " { {. cfg -s trafgen --in ns-ng. It has its own flexible, macro-based low-level packet configuration language. txt -f 1,3 --output-delimiter='_'. bpfc: a tiny Berkeley Packet Filter compiler supporting Linux extensions. ln command in Linux with Examples. To look for a file by its name in a particular directory, run. Examples We provided two examples to show how to use the driver API: One for interrupt mode ( xtrafgen_interrupt_example. trafgen, a multithreaded low-level zero-copy network packet generator;. Shaping may be more than lowering the available bandwidth - it is also used to smooth out bursts in traffic for better network behaviour. Contains an example on how to use the XTrafgen driver directly. Copy an entire directory. txf on eth0 using CPU 0: trafgen --dev . gencfg. $ rsync -av -e ssh --max-size='500k' /src/ [email protected]:/path/to/dst/ Closing Thoughts In this guide, we learned 20 different practical command examples for the rsync command in Linux. In above example, we have the document directory and inside the document directory we have a directory named geeksforgeeks and inside that directory we have example directory. Generate a limited amount of random network traffic between 2 hosts. Simply look out for "rate limited traffic generators". Here are some of the ways you can use the source command:. An example usage case is provided below to test RAMs. Stay connected to us as we give you some really nice Linux script examples. Apply byte separators to test syntax after changes to the lex parser. They are relatively not difficult. Example 7: Sort by Months. There are different types of regular expression in Linux. $ sudo find /var/log -type f -name *. The gzip is a useful command when it comes to file management. mp4) in the user profile named "Peter" ( /home/peter/ ). Synchronous Ethernet must be able to detect failures (for example Linux manual page. It’s quite easy to perform arithmetic operations inside Linux shell scripts. A high-performance network traffic generator that uses the zero-copy TX_RING for network I/O. [1] http://thread. For details, see xtrafgen_interrupt_example. It is split into two components: the flowgrind daemon and the flowgrind controller. txt" will be in the directory "/path/to/directory". Implementation and Simulation of Linux Virtual Server in ns. trafgen, Examples Usual work mode (all CPUs, send conf through C preprocessor): trafgen --dev eth0 --conf tcp syn test --cpp. txt files with the following rsync command. This is such a frequently used combination that rsync provides the -a (archive) option as a shorthand way to invoke them all. It has three internal RAMS: MASTER. #!/bin/bash echo "Hello World". Characterization and Comparison of DDoS Attack Tools and Traffic. For details, see xtrafgen_static_mode_example. Generate traffic defined in trafgen. Create a Tar Archive File Suppose we want to create tar archive "Ubuntupit. What is Linux is it a example of a personal computer operating system? Yes, Linux is like an operating system much like Windows OS or Mac OS. trafgen utilizes the packet(7) socket interface of Linux which. Running the Design Example Application on a Hardware Setup. The characters are pretty easy to remember. trafgen: A fast, multithreaded network packet generator. It is a tool under linux. Netfilter and XDP we have two embedding bindings: NFLua and XDPLua, respectively. Here, you can see an example of copying one single file from a local host to a remote server. In the following example, tr will replace all characters from the standard input (linuxize), by mapping the characters from the first set with the matching ones from the second set. Popular Course in this category Linux Training Program (16 Courses, 3+ Projects). c) One for polling mode ( xtrafgen_polling_example. In the following example, tr will replace all characters from the standard input (linuxize), by mapping the characters from the first set with the matching ones from the second set. * [PATCH net-next 0/3] Extend locked port feature with FDB locked flag (MAC-Auth/MAB) @ 2022-03-10 14:23 Hans Schultz 2022-03-10 14:23 ` [PATCH net-next 1/3] net: bridge: add fdb flag to extent locked port feature Hans Schultz ` (4 more replies) 0 siblings, 5 replies; 53+ messages in thread From: Hans Schultz @ 2022-03-10 14:23 UTC (permalink. trafgen is a zero-copy high performance network packet traffic generator utility that is part of the netsniff-ng networking toolkit. Linux' packet mmap(), BPF, and the netsniff. trafgen is a fast, zero-copy network traffic generator for debugging, performance evaluation, and fuzz-testing. Implement trafgen with how-to, Q&A, fixes, code snippets. trafgen makes use of packet(7) socket’s TX_RING interface of the Linux kernel, which is a mmap(2)’ed ring buffer shared between user and kernel space. What is routing: Building routing tables in Linux. cfg --out eth1 --rand Download. Routing tables contain the parameters necessary for the correct identification and reading of the network route. mausezahn eth0 -c 0 -d 2s -t bpdu vlan=5 Send BPDU frames for VLAN 5 as used with Cisco's PVST+ type of STP. c Write a batch script that calls mpiexec to execute the compiled MPI code. The default setting for the Linux ln command is to create hard links. Running tr without any options replaces each of the characters specified in SET1 with the characters from SET2 that have the same position. trafgen is Linux specific, meaning there is no support for other operating systems, same as netsniff-ng(8), thus we can keep the code footprint quite minimal and to the point. Linux dd Command Example. cfg This is the most simple and, probably, the most common use of trafgen. Add config addressed in ip frag patch to linux kernel. Stay connected to us as we give you some really nice Linux script examples. Example can be seen via from 'trafgen -e' as well (as already mentioned), this example needs '--cpp': /* Note: dynamic elements make trafgen slower! This above is how an comment looks like. ls – l on terminal gives. If you look at the previous rsync command you’ll see a trailing forward slash “/” on the file path of the source directory. This example demonstrates by programming known data to Master RAM and commands to Command and Param RAM. MASTER RAM is used to load/store data from. bin /* Read from Master RAM */ $LINUX > diff 8K. trafgen属于netsniff-ng套件,是一款linux下的工具,安装很方便,通过系统的在线 example: * trafgen --cpp --dev em2 --conf synflood. The example configuration is passed via stdin and also through the C preprocessor before trafgen's packet compiler will see it. Sending small UDP packets from the Linux Kernel to LOOPBACK. For testing purposes local traffic was generated using trafgen for the client and netcat to start a server example output from nstat: \~# nstat -a | grep InMac Ip6InMacErrors 0 0. * RAM, COMMAND RAM, PARAMETER RAM. In contrast to similar tools like iperf or netperf it features a distributed architecture, where throughput and other. Search for files inside archive. There are different types of regular expression in Linux. 3- Use scp Command to copy a Local File to a Remote Server. dd if=/dev/cdrom of=space_jam_dvd. tar" in the Documents directory. Earlier I mentioned that the standard byte size of a cd-rom is 2048. Linux for Network Engineers: How to use nping. The server runs on the remote host and listens for connections from the client. Linux ln command: Creating links in Linux. Convert input file to trafgen packet configuration. On 10-Gigabit- per-second Ethernet, trafgen might be slower than pktgen due to the user/kernel space overhead but still has a fairly high. Here are some simple examples: mausezahn -t help mausezahn -t tcp help mausezahn eth3 -t udp sp=69,dp=69,p=ca:fe:ba:be Note: Don't forget that on the CLI the Linux shell (usually the Bash). For example, the following command prints all fields except the first and third: cut employees. This example demonstrates by programming known data to Master RAM and commands to Command and Param RAM. Let's see some practical examples of the find command. Example can be seen via from 'trafgen -e' as well (as already mentioned), this example needs '--cpp': /* Note: dynamic elements make trafgen slower! This above is how an comment looks like. Copy a file from a remote to a local system To reverse the direction of the copy operation, we'll simply switch the local and the remote path. Berkley's Smart Client [] is an example of such an approach. They contain the following sections: Destination (Target). An example when this drop can occur is when manually crafting raw packets that will be consumed by a user space application via a tap device. -C, --no-cpu-stats ¶ Do not print CPU time statistics on exit. lld: error: undefined symbol: update_stripe @ 2022-10-06 12:56 ` kernel test robot 0 siblings, 0 replies; 2+ messages in thread From: kernel test robot @ 2022-10-06 12:56 UTC (permalink / raw) To: Amit Kumar Mahapatra; +Cc: llvm, kbuild-all, linux-arm-kernel, Michal Simek [-- Attachment #1: Type: text/plain. Trafgen belongs to the netsniff-ng suite. The tr command in UNIX is a command line utility for translating or deleting characters. The AXI Traffic Generator IP is designed to. To give you a taste of a more advanced example, run ''trafgen -e'', . cfg'' packet configuration file (which contains drnd() calls) and send out the generated packets to the ''eth0'' device. This is such a frequently used combination that rsync provides the -a (archive) option as a shorthand way to invoke them all. # Edit the file `/etc/motd` (which only superusers have write access to) $ sudo vi /etc/motd. xtrafgen_master_streaming_example. On 10-Gigabit-per-secondEthernet, trafgen might be slower than pktgen due to the user/kernel spaceoverhead but still has a fairly high performance. trafgen, a multithreaded low-level zero-copy network packet generator . Specify which characters from the input you want to convert. Stay connected to us as we give you some really nice Linux script examples. Here, the first ‘–‘ implies that we have selected a file. tr [options] SET1 [SET2] Options. txf --bind-cpu 0 Generate traffic on eth0 using CPU 0, wait 100 us between packets. Any beginner in the programming niche is first taught how to code out the “Hello World” with any language. There are two ways to locate specific content using tar: 1. Enhanced Platform Awareness Performance Benefits using RIFT. Implement trafgen with how-to, Q&A, fixes, code snippets. axi-traffic-gen/driver/master_ram /* Write to Master RAM */ $LINUX > cat /sys/devices/axi. It can be used with UNIX pipes to support more complex translation. 4, da[0]=dinc()), tcp() }' [ IPv4 Addr (127. A simple tr command use case is to change all lower case letters in text to upper case and vice versa, as shown below. 8 Sample Scenario for Traffic Control A small company has a 10 Mbit/s link which connects its workstations and one FTP server to an Internet service provider. mp4) in the user profile named “Peter” ( /home/peter/ ). trafgen, a multithreaded low-level zero-copy network packet generator; It can craft nearly every possible or impossible packet. txt linux is my life linux has changed my life linux is best and everthing to me. 3) Find a file with name from a directory. iperf bind to interface name. Top 50+ Linux Commands with Example. EXAMPLES Generate traffic defined in trafgen. -C, --no-cpu-stats Do not print CPU time statistics on exit. Hello World Any beginner in the programming niche is first taught how to code out the "Hello World" with any language. We can also look for all the files with. trafgen is Linux specific, meaning there is no support for other operating systems, same as netsniff-ng(8), thus we can keep the code footprint quite minimal and to the point. Initiating the master logic will take the data from Master RAM (from a location) and generate data for slave transactions which will be stored in Master RAM at a different location specified by commands. JWM / Linux is a collection of various performance and analyze tools Arbitrary packet config examples (e. Next, initiate a client connection from another container to measure the bandwidth between the two endpoints. The tr command has the following syntax: tr [options] charset1 [charset2] These are the useful options for the tr command: -d :. One practical example of this method would be to replace () with {} or replacing underscore (_) with dash (-) something like that. trafgen --dev eth0 --conf trafgen. The AXI Traffic Generator IP is designed to. trafgen: Part of a suite of Linux network tools . trafgen属于netsniff-ng套件,是一款linux下的工具,安装很方便,通过系统的在线 TCP SYN attack ( 64byte ) * Command example: * trafgen --cpp . Examples You can refer to the below stated example applications for more details on how to use trafgen driver. Compile this (or any MPI program). In this example, we'll use a simple 'HelloWorld' application. txt root @IP C: /home/ remote_dir. trafgen is a fast, zero-copy network traffic generator for debugging, performance evaluation, and fuzz-testing. , UNIX and Linux System Administration Handbook, Definition of default values (UID and GID ranges, mail directory, . axi-traffic-gen/driver/master_ram > sri. For example, on Linux and FreeBSD this includes among others the kernel's estimation of the end-to-end RTT, the size of the TCP congestion window (CWND) and slow start threshold (SSTHRESH). echo 'linuxize' | tr 'lin' 'red' Each occurrence of l is replaced with r, i with e, and n with d: reduxeze. To do this, simply type dir without any options and press enter. The most basic use of the dir command is to list the contents of the current directory. Its gain of performance is reached by zero-copy mechanisms for network packets. Specify the -M option to arrange data according to months listed in a file. On Gigabit Ethernet, trafgen has a comparable performance to pktgen, the built-in Linux kernel traffic generator, except that trafgen is more flexible in terms of packet configuration possibilities. * When Configured in Master only mode. We need to use the “-E” option with the character/string interval value. trafgen --dev eth0 --conf fuzzing. 1 Example of Host Aggregate Configuration. cfg -s trafgen --in ns-ng. An example when this drop can occur is when manually crafting raw packets that will be consumed by a user space application via a tap device. It has a powerful packet configuration language, which is rather low. log extension in /var/log folder, run. As with the CP command, SCP can be used to copy an entire directory recursively. txf on eth0 using CPU 0 trafgen --dev eth0 --conf trafgen. c) One for polling mode ( xtrafgen_polling_example. When traffic is shaped, its rate of transmission is under control. First, the kernel initializes all frames to TP_STATUS_AVAILABLE. -e, --example Show a built-in packet configuration example. Alternatlvely user can create bin files of their respective sizes (Master RAM -8K size) and then write directly to Master RAM from the linux prompt, Bin files can be easily created using open source 'hexedit' tool. It is a file compressing tool with its primary goal is to reduce file size. Sort the data from the ls -l output by months by running the following command: sort -Mk6 month-sorting. Software Components Usage ⋆ TrafMon. Create a trafgen configuration file from a pcap and generate it out eth1 in random order. The “dd” command can be used to create a file of a specific size. On 10-Gigabit-per-second Ethernet, trafgen might be slower than pktgen due to the user/kernel space overhead but still has a fairly high. For details, see xtrafgen_interrupt_example. Above command will look for cleanup. trafgen utilizes the packet(7) socket interface of Linux which postpones complete control over packet data and packet headers into the user space. fivem drug script free; partes de una llanta de moto; marlin 243 lever action rifle; sitrex 5200 hay tedder parts; nut and bolt checker. Use SCP Command to Copy a File in Linux. ISO from CD/DVD You can copy directly from the cd-rom drive if your computer still has one. 1 Scheduler Examples. When specifying multiple characters/bytes/fields, the cut command concatenates the output without a delimiter. The option -type f asks it to. For example, you may specify what Operating System is booted on your nodes. 3) Find a file with name from a directory. * generate AXI4 traffic which can be used to stress different modules/. IPAddress }}" iperf3-server (Returned) 172. Following are the examples are given below: Example #1 - Ifstat Command The "ifstat" command is providing the IN and OUT packet-related information of all the network interfaces associated with the Linux environment. For example, the following command prints all fields except the first and third: cut employees. 15+ tar command examples in Linux. 3rd Form: Here, we will specify the directory name and a file to be linked to the directory. $ rsync -av --exclude *. The installation is very convenient. * generate AXI4 traffic which can be used to stress different modules/. The examples that will be given here will definitely help you understand shell scripting better. * trafgen is a high-performance network traffic generator based on packet mmap(2) mechanisms. Create an archive using tar command. Using the AND Operator The AND operator allows our program to check if multiple conditions are satisfied at once or not. Linux tr Command Examples 1. 1st Form: This form is simple, the source file with destination link name you have to specify: 2nd. c) Asserts Asserts are used within all Xilinx drivers to enforce constraints on argument values. Generating the Example Design using Intel® Quartus® Prime 3. org/linux/man-pages/man8/trafgen. tr command in Unix/Linux with examples. netsniff-ng, a fast zero-copy analyzer, pcap capturing and replaying tool; trafgen, a multithreaded low-level zero-copy network packet generator; mausezahn, . Specify a delimiter in the output using the --output-delimiter option. It supports a range of transformations including uppercase to lowercase,.