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The sed script can either be specified on the command line (-e option) or read from a separate file (-f option). Commands in the sed script may take an optional address, in terms of line numbers or regular expressions. The address determines when the command is run.
The man page for the sed utility, as seen in various Linux distributions. A man page (short for manual page ) is a form of software documentation found on Unix and Unix-like operating systems . Topics covered include programs, system libraries , system calls , and sometimes local system details.
sed: Text processing Mandatory Stream editor Version 7 AT&T UNIX sh: Shell programming Mandatory Shell, the standard command language interpreter Version 7 AT&T UNIX (in earlier versions, sh was either the Thompson shell or the PWB shell) sleep: Shell programming Mandatory Suspend execution for an interval Version 4 AT&T UNIX sort: Text ...
The number of lines printed may be changed with a command line option. The following example shows the first 20 lines of filename: head -n 20 filename. This displays the first 5 lines of all files starting with foo: head -n 5 foo* Most versions [citation needed] allow omitting n and instead directly specifying the number: -5.
xargs (short for "extended arguments") [1] is a command on Unix and most Unix-like operating systems used to build and execute commands from standard input. It converts input from standard input into arguments to a command. Some commands such as grep and awk can take input either as
The tr command provided in the Samples section does not do the same as the corresponding sed command. The tr command removes all line breaks, exchanging them with whitespace, while the sed command removes every line break that is succeeded by a whitespace on the next line (but doesn't add extra whitespace).
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]
Xed is a lightweight text editor forked from Pluma and is the default text editor in Linux Mint. [1] Xed is a graphical application which supports editing multiple text files in one window via tabs. It fully supports international text through its use of the Unicode UTF-8 encoding. As a general-purpose text editor, Xed supports most standard ...