This is a draft cheat sheet. It is a work in progress and is not finished yet.
Pipeline Commands
sort |
Sorts the contents of a text file |
head [-n=num] |
Prints the first num or 10 lines of the text file |
tail [-n=num] |
Prints the last num or 10 lines of the text file |
Sed Commands
sed -r 'action' |
Apply action to all lines |
sed -r 'address action' |
Apply action to lines that match address |
sed -r 'address!action' |
Apply action to lines that don't match address |
Grep Commands
grep -E "..." |
Extended RegEx Search Pattern |
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Sed Address Commands
blank |
Match everything |
line number |
Match specific line |
$ |
Match last line of file |
/regexp/ |
Match lines that match regex |
line1,line2 |
Match lines between the limits |
/regexp1/,/regexp2/ |
Match lines between the two regex occurances |
line1,/regexp1/ |
Matches all lines between line1 and the regex |
/regexp2/,line2 |
Matches all lines between the regex and line2 |
Sed Action Commands
p |
Print the line |
d |
Delete the line |
s/regex/string/ |
Change the first match of regex on the line to string |
s/regex/string/2 |
Change the second match of regex on the line to string |
s/regex/string/g |
Change all matches of regex to string |
s/regex/string/i |
Case insensitive. Change the first match of regex on the line to string |
y/string1/string2/ |
Transliterate corresponding characters |
istring |
Insert a line before the current line |
astring |
Insert a line after the current line |
Within a replacement string you can use:
& - represents the matched regex
\U \L \E \u \l - to do case conversion
\1 \2 etc - to represent brackets in the regex
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