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Utilities listed in POSIX.1-2017. This is a list of POSIX (Portable Operating System Interface) commands as specified by IEEE Std 1003.1-2024, which is part of the Single UNIX Specification (SUS).
The pcregrep command is an implementation of grep that uses Perl regular expression syntax. [17] Similar functionality can be invoked in the GNU version of grep with the -P flag. [18] Ports of grep (within Cygwin and GnuWin32, for example) also run under Microsoft Windows. Some versions of Windows feature the similar qgrep or findstr command. [19]
ngrep (network grep) is a network packet analyzer written by Jordan Ritter.It has a command-line interface, and relies upon the pcap library and the GNU regex library.. ngrep supports Berkeley Packet Filter logic to select network sources or destinations or protocols, and also allows matching patterns or regular expressions in the data payload of packets using GNU grep syntax, showing packet ...
In the above example, the find utility feeds the input of xargs with a long list of file names. xargs then splits this list into sublists and calls rm once for every sublist. Some implementations of xargs can also be used to parallelize operations with the -P maxprocs argument to specify how many parallel processes should be used to execute the ...
Like sed and grep, it is a filter, [4] and it is a standard feature of most Unix-like operating systems. The AWK language is a data-driven scripting language consisting of a set of actions to be taken against streams of textual data – either run directly on files or used as part of a pipeline – for purposes of extracting or transforming ...
This is the case for many common commands; the following examples cat file | grep pattern cat file | less can instead be written as grep pattern file less file A common interactive use of cat for a single file is to output the content of a file to standard output. However, if the output is piped or redirected, cat is unnecessary.
The first operation may be performed by programs such as losetup [8] in Linux, or lofiadm [9] in SunOS. As an example, if example.img is a regular file containing a file system and /home/you/dir is a Linux user's directory, the superuser (root) may mount the file on the directory by executing the following two commands:
These options can be configured per profile, allowing users to execute different commands depending on the profile. For example, some users may have one profile to launch their default shell, another profile that connects to another computer remotely through SSH, and finally a profile that opens a GNU Screen session.