5 lines
16 KiB
Markdown
5 lines
16 KiB
Markdown
|
[Source](http://www.pement.org/sed/sed1line.txt "Permalink to ")
|
||
|
|
|
||
|
|
\------------------------------------------------------------------------- USEFUL ONE-LINE SCRIPTS FOR SED (Unix stream editor) Dec. 29, 2005 Compiled by Eric Pement - pemente[at]northpark[dot]edu version 5.5 Latest version of this file (in English) is usually at: http://sed.sourceforge.net/sed1line.txt http://www.pement.org/sed/sed1line.txt This file will also available in other languages: Chinese - http://sed.sourceforge.net/sed1line_zh-CN.html Czech - http://sed.sourceforge.net/sed1line_cz.html Dutch - http://sed.sourceforge.net/sed1line_nl.html French - http://sed.sourceforge.net/sed1line_fr.html German - http://sed.sourceforge.net/sed1line_de.html Italian - http://sed.sourceforge.net/sed1line_it.html Portuguese - http://sed.sourceforge.net/sed1line_pt-BR.html Spanish - http://sed.sourceforge.net/sed1line_es.html FILE SPACING: # double space a file sed G # double space a file which already has blank lines in it. Output file # should contain no more than one blank line between lines of text. sed '/^$/d;G' # triple space a file sed 'G;G' # undo double-spacing (assumes even-numbered lines are always blank) sed 'n;d' # insert a blank line above every line which matches "regex" sed '/regex/{x;p;x;}' # insert a blank line below every line which matches "regex" sed '/regex/G' # insert a blank line above and below every line which matches "regex" sed '/regex/{x;p;x;G;}' NUMBERING: # number each line of a file (simple left alignment). Using a tab (see # note on 't' at end of file) instead of space will preserve margins. sed = filename | sed 'N;s/n/t/' # number each line of a file (number on left, right-aligned) sed = filename | sed 'N; s/^/ /; s/ *(.{6,})n/1 /' # number each line of file, but only print numbers if line is not blank sed '/./=' filename | sed '/./N; s/n/ /' # count lines (emulates "wc -l") sed -n '$=' TEXT CONVERSION AND SUBSTITUTION: # IN UNIX ENVIRONMENT: convert DOS newlines (CR/LF) to Unix format. sed 's/.$//' # assumes that all lines end with CR/LF sed 's/^M$//' # in bash/tcsh, press Ctrl-V then Ctrl-M sed 's/x0D$//' # works on ssed, gsed 3.02.80 or higher # IN UNIX ENVIRONMENT: convert Unix newlines (LF) to DOS format. sed "s/$/`echo -e `/" # command line under ksh sed 's/$'"/`echo `/" # command line under bash sed "s/$/`echo `/" # command line under zsh sed 's/$/r/' # gsed 3.02.80 or higher # IN DOS ENVIRONMENT: convert Unix newlines (LF) to DOS format. sed "s/$//" # method 1 sed -n p # method 2 # IN DOS ENVIRONMENT: convert DOS newlines (CR/LF) to Unix format. # Can only be done with UnxUtils sed, version 4.0.7 or higher. The # UnxUtils version can be identified by the custom "--text" switch # which appears when you use the "--help" switch. Otherwise, changing # DOS newlines to Unix newlines cannot be done with sed in a DOS # environment. Use "tr" instead. sed "s/r//" infile >outfile # UnxUtils sed v4.0.7 or higher tr -d r outfile # GNU tr version 1.22 or higher # delete leading whitespace (spaces, tabs) from front of each line # aligns all text flush left sed 's/^[ t]*//' # see note on 't' at end of file # delete trailing whitespace (spaces, tabs) from end of each line sed 's/[ t]*$//' # see note on 't' at end of file # delete BOTH leading and trailing whitespace from each line sed 's/^[ t]*//;s/[ t]*$//' # insert 5 blank spaces at beginning of each line (make page offset) sed 's/^/ /' # align all text flush right on a 79-column width sed -e :a -e 's/^.{1,78}$/ &/;ta' # set at 78 plus 1 space # center all text in the middle of 79-column width. In method 1, # spaces at the beginning of the line are significant, and trailing # spaces are appended at the end of the line. In method 2, spaces at # the beginning of the line are discarded in centering the line, and # no trailing spaces appear at the end of lines. sed -e :a -e 's/^.{1,77}$/ & /;ta' # method 1 sed -e :a -e 's/^.{1,77}$/ &/;ta' -e 's/( *)1/1/' # method 2 # substitute (find and replace) "foo" with "bar" on each line sed 's/foo/bar/' # replaces only 1st instance in a line sed 's/foo/bar/4' # replaces only 4th instance in a line sed 's/foo/bar/g'
|
||
|
|
|