1. Linux Sed Command Cheat Sheet
2. Sed Stream Editor Cheat Sheet

Here's the next cheat sheet I've created - cheat sheet of sed, the Superman of stream editing. It has come handy 101 times for me because sed is not what I use daily and after some time of not using the sed commands tend to fade away from my mind and I have to review them quickly. This cheat sheet. 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 Continue reading Sed cheat sheet / one-line sed. A programming cheat sheet. Sed general form sed range from(,range to)?command syntax a # match the letter a.

sed is an extremely powerful stream editor. The web is full of useful sed one liners.

Remote download wireless adapter lg. This post will be an ever growing list of sed An wf100 wifi dongle. one liners I have found useful.

Find and Replace

Find and remove all instances of TEXT:

Find and remove all spaces:

Delete all blank lines from a file

Delete leading whitespace from front of each line

Delete trailing whitespace from end of each line

Delete leading and trailing whitespace from each line

Insert a line of text before a line

Change configuration file values

Change BRIDGE_HOTPLUG=yes to BRIDGE_HOTPLUG=no no matter what it is already set to: Nijamellam maranthu pochu song heroine name.

Change PermitRootLogin no to PermitRootLogin yes no matter what it is already set to:

Wrap Value in Double Quotes

Change date=2015 to date='2015”:

Remove word wrap

Display links between href tags

Linux Sed Command Cheat Sheet

Lower case all href=”*” tags

Lower case all img src=”*” tags

Lower case all href=”” tags but exclude href='http” tags

Lower case all img src=”” tags but exclude img src='http” tags

Remove ‘%20’ only from lines matching href=”*”

References

Sed Stream Editor Cheat Sheet

1. sed G
2. # double space a file which already has blank lines in it. Output file
3. # should contain no more than one blank line between lines of text.
4. sed‘G;G’
5. # undo double-spacing (assumes even-numbered lines are always blank)
6. # insert a blank line above every line which matches “regex”
7. # insert a blank line below every line which matches “regex”
8. # insert a blank line above and below every line which matches “regex”
9. # number each line of a file (simple left alignment). Using a tab (see
10. # note on ‘t’ at end of file) instead of space will preserve margins.
11. # number each line of a file (number on left, right-aligned)
12. # number each line of file, but only print numbers if line is not blank
13. sed -n ‘$=’
14. TEXT CONVERSION AND SUBSTITUTION:
15. # IN UNIX ENVIRONMENT: convert DOS newlines (CR/LF) to Unix format.
16. sed‘s/.$//’# assumes that all lines end with CR/LF
17. sed‘s/^M$//’# in bash/tcsh, press Ctrl-V then Ctrl-M
18. sed‘s/x0D$//’# works on ssed, gsed 3.02.80 or higher
19. # IN UNIX ENVIRONMENT: convert Unix newlines (LF) to DOS format.
20. sed‘s/$’“/`echo r`/”# command line under bash
21. sed‘s/$/r/’# gsed 3.02.80 or higher
22. # IN DOS ENVIRONMENT: convert Unix newlines (LF) to DOS format.
23. sed -n p # method 2
24. # IN DOS ENVIRONMENT: convert DOS newlines (CR/LF) to Unix format.
25. # Can only be done with UnxUtils sed, version 4.0.7 or higher. The
26. # UnxUtils version can be identified by the custom “–text” switch
27. # which appears when you use the “–help” switch. Otherwise, changing
28. # DOS newlines to Unix newlines cannot be done with sed in a DOS
29. sed“s/r//” infile >outfile # UnxUtils sed v4.0.7 or higher
30. tr -d r <infile >outfile # GNU tr version 1.22 or higher
31. # delete leading whitespace (spaces, tabs) from front of each line
32. sed‘s/^[ t]*//’# see note on ‘t’ at end of file
33. # delete trailing whitespace (spaces, tabs) from end of each line
34. # delete BOTH leading and trailing whitespace from each line
35. # insert 5 blank spaces at beginning of each line (make page offset)
36. sed -e :a -e ‘s/^.{1,78}$/ &/;ta’# set at 78 plus 1 space
37. # center all text in the middle of 79-column width. In method 1,
38. # spaces at the beginning of the line are significant, and trailing
39. # spaces are appended at the end of the line. In method 2, spaces at
40. # the beginning of the line are discarded in centering the line, and
41. sed -e :a -e ‘s/^.{1,77}$/ & /;ta’# method 1
42. sed -e :a -e ‘s/^.{1,77}$/ &/;ta’ -e ‘s/( *)1/1/’# method 2
43. # substitute (find and replace) “foo” with “bar” on each line
44. sed‘s/foo/bar/’# replaces only 1st instance in a line
45. sed‘s/foo/bar/4’# replaces only 4th instance in a line
46. sed‘s/foo/bar/g’# replaces ALL instances in a line
47. sed‘s/(.*)foo(.*foo)/1bar2/’# replace the next-to-last case
48. # substitute “foo” with “bar” ONLY for lines which contain “baz”
49. # substitute “foo” with “bar” EXCEPT for lines which contain “baz”
50. sed‘s/scarlet/red/g;s/ruby/red/g;s/puce/red/g’# most seds
51. # bug/feature in HHsed v1.5 causes blank lines to be deleted
52. sed -n ‘1!G;h;$p’# method 2
53. # reverse each character on the line (emulates “rev”)
54. sed‘$!N;s/n/ /’
55. # if a line ends with a backslash, append the next line to it
56. # if a line begins with an equal sign, append it to the previous line
57. sed -e :a -e ‘$!N;s/n=/ /;ta’ -e ‘P;D’
58. # add commas to numeric strings, changing “1234567” to “1,234,567”
59. sed -e :a -e ‘s/(.*[0-9])([0-9]{3})/1,2/;ta’# other seds
60. # add commas to numbers with decimal points and minus signs (GNU sed)
61. gsed -r ‘:a;s/(^|[^0-9.])([0-9]+)([0-9]{3})/12,3/g;ta’
62. # add a blank line every 5 lines (after lines 5, 10, 15, 20, etc.)
63. sed‘n;n;n;n;G;’# other seds
64. SELECTIVE PRINTING OF CERTAIN LINES:
65. # print first 10 lines of file (emulates behavior of “head”)
66. sed q
67. # print the last 10 lines of a file (emulates “tail”)
68. # print the last 2 lines of a file (emulates “tail -2”)
69. # print the last line of a file (emulates “tail -1”)
70. sed -n ‘$p’# method 2
71. # print the next-to-the-last line of a file
72. sed -e ‘$!{h;d;}’ -e x # for 1-line files, print blank line
73. sed -e ‘1{$q;}’ -e ‘$!{h;d;}’ -e x # for 1-line files, print the line
74. sed -e ‘1{$d;}’ -e ‘$!{h;d;}’ -e x # for 1-line files, print nothing
75. # print only lines which match regular expression (emulates “grep”)
76. sed‘/regexp/!d’# method 2
77. # print only lines which do NOT match regexp (emulates “grep -v”)
78. sed -n ‘/regexp/!p’# method 1, corresponds to above
79. # print the line immediately before a regexp, but not the line
80. sed -n ‘/regexp/{g;1!p;};h’
81. # print the line immediately after a regexp, but not the line
82. sed -n ‘/regexp/{n;p;}’
83. # print 1 line of context before and after regexp, with line number
84. # indicating where the regexp occurred (similar to “grep -A1 -B1”)
85. sed‘/AAA/!d; /BBB/!d; /CCC/!d’
86. # grep for AAA and BBB and CCC (in that order)
87. sed -e ‘/AAA/b’ -e ‘/BBB/b’ -e ‘/CCC/b’ -e d # most seds
88. # print paragraph if it contains AAA (blank lines separate paragraphs)
89. # HHsed v1.5 must insert a ‘G;’ after ‘x;’ in the next 3 scripts below
90. # print paragraph if it contains AAA and BBB and CCC (in any order)
91. sed -e ‘/./{H;$!d;}’ -e ‘x;/AAA/!d;/BBB/!d;/CCC/!d’
92. # print paragraph if it contains AAA or BBB or CCC
93. sed -e ‘/./{H;$!d;}’ -e ‘x;/AAA/b’ -e ‘/BBB/b’ -e ‘/CCC/b’ -e d
94. gsed ‘/./{H;$!d;};x;/AAA|BBB|CCC/b;d’# GNU sed only
95. # print only lines of 65 characters or longer
96. sed -n ‘/^.{65}/!p’# method 1, corresponds to above
97. # print section of file from regular expression to end of file
98. # print section of file based on line numbers (lines 8-12, inclusive)
99. sed‘8,12!d’# method 2
100. # print line number 52
101. sed’52!d’# method 2
102. gsed -n ‘3~7p’# GNU sed only
103. # print section of file between two regular expressions (inclusive)
104. # print all of file EXCEPT section between 2 regular expressions
105. # delete duplicate, consecutive lines from a file (emulates “uniq”).
106. # First line in a set of duplicate lines is kept, rest are deleted.
107. # delete duplicate, nonconsecutive lines from a file. Beware not to
108. # overflow the buffer size of the hold space, or else use GNU sed.
109. sed -n ‘G; s/n/&&/; /^([ -~]*n).*n1/d; s/n//; h; P’
110. # delete all lines except duplicate lines (emulates “uniq -d”).
111. sed‘1,10d’
112. # delete the last line of a file
113. sed‘N;$!P;$!D;$d’
114. # delete the last 10 lines of a file
115. sed -n -e :a -e ‘1,10!{P;N;D;};N;ba’# method 2
116. # delete every 8th line
117. sed‘n;n;n;n;n;n;n;d;’# other seds
118. # delete lines matching pattern
119. # delete ALL blank lines from a file (same as “grep ‘.’ “)
120. sed‘/./!d’# method 2
121. # delete all CONSECUTIVE blank lines from file except the first; also
122. # deletes all blank lines from top and end of file (emulates “cat -s”)
123. sed‘/./,/^$/!d’# method 1, allows 0 blanks at top, 1 at EOF
124. sed‘/^$/N;/n$/D’# method 2, allows 1 blank at top, 0 at EOF
125. # delete all CONSECUTIVE blank lines from file except the first 2:
126. sed‘/./,$!d’
127. # delete all trailing blank lines at end of file
128. sed -e :a -e ‘/^n*$/{$d;N;ba’ -e ‘}’# works on all seds
129. sed -e :a -e ‘/^n*$/N;/n$/ba’# ditto, except for gsed 3.02.*
130. # delete the last line of each paragraph
131. # remove nroff overstrikes (char, backspace) from man pages. The ‘echo’
132. # command may need an -e switch if you use Unix System V or bash shell.
133. sed“s/.`echo b`//g”# double quotes required for Unix environment
134. sed‘s/.^H//g’# in bash/tcsh, press Ctrl-V and then Ctrl-H
135. sed‘s/.x08//g’# hex expression for sed 1.5, GNU sed, ssed
136. # get Usenet/e-mail message header
137. sed‘/^$/q’# deletes everything after first blank line
138. # get Usenet/e-mail message body
139. sed‘1,/^$/d’# deletes everything up to first blank line
140. # get Subject header, but remove initial “Subject: ” portion
141. sed‘/^Reply-To:/q; /^From:/h; /./d;g;q’
142. # parse out the address proper. Pulls out the e-mail address by itself
143. # from the 1-line return address header (see preceding script)
144. # add a leading angle bracket and space to each line (quote a message)
145. # delete leading angle bracket & space from each line (unquote a message)
146. # remove most HTML tags (accommodates multiple-line tags)
147. # extract multi-part uuencoded binaries, removing extraneous header
148. # info, so that only the uuencoded portion remains. Files passed to
149. # sed must be passed in the proper order. Version 1 can be entered
150. # from the command line; version 2 can be made into an executable
151. # Unix shell script. (Modified from a script by Rahul Dhesi.)
152. sed‘/^end/,/^begin/d’ file1 file2 … fileX | uudecode # vers. 1
153. # sort paragraphs of file alphabetically. Paragraphs are separated by blank
154. # lines. GNU sed uses v for vertical tab, or any unique char will do.
155. sed‘/./{H;d;};x;s/n/={NL}=/g’file | sort | sed‘1s/={NL}=//;s/={NL}=/n/g’
156. gsed ‘/./{H;d};x;y/n/v/’file | sort | sed‘1s/v//;y/v/n/’
157. # zip up each .TXT file individually, deleting the source file and
158. # setting the name of each .ZIP file to the basename of the .TXT file
159. # (under DOS: the “dir /b” switch returns bare filenames in all caps).
160. dir /b *.txt | sed“s/^(.*).TXT/pkzip -mo 1 1.TXT/” >>zipup.bat