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Set the options for a terminal Version 2 AT&T UNIX tabs: Misc Mandatory Set terminal tabs PWB UNIX tail: Text processing Mandatory Copy the last part of a file PWB UNIX [citation needed] talk: Misc Optional (UP) Talk to another user 4.2BSD tee: Shell programming Mandatory Duplicate the standard output: Version 5 AT&T UNIX test: Shell ...
grep is a command-line utility for searching plaintext datasets for lines that match a regular expression. Its name comes from the ed command g/re/p (global regular expression search and print), which has the same effect.
The test command in Unix evaluates the expression parameter. In most recent shell implementations, it is a shell builtin, even though the external version still exists.In the second form of the command, the [ ] (brackets) must be surrounded by blank spaces (this is because [is a program and POSIX compatible shells require a space between the program name and its arguments).
The original Bell Labs version was written by Gottfried W. R. Luderer. [1] [2] cut is part of the X/Open Portability Guide since issue 2 of 1987.It was inherited into the first version of POSIX.1 and the Single Unix Specification. [3]
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 ...
grep like filter n: Next Search Match N: Previous Search Match Esc u: Turn off Match Highlighting (see -g command line option) - c Toggle option c , e.g., -i toggles option to match case in searches m c Set Mark c ' c Go to Mark c = or Ctrl+G: File information : n: Next file : p: Previous file h: Help. This is presented with less, q to quit. q
wc (short for word count) is a command in Unix, Plan 9, Inferno, and Unix-like operating systems.The program reads either standard input or a list of computer files and generates one or more of the following statistics: newline count, word count, and byte count.
Semgrep rules are similar to source code and do not require knowledge of a domain specific language to write. Both open source and commercial rules can be forked and customized to a user's codebase, however only commercial users are able to customize commercial rules. All users are free to fork and modify open source (community) rules. [7]