10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I want to search texts between first occurence of the matching pattern and replace it with some other text.pls advice what can be done. I searched alot, i could not find anything relevant.
Ex my input is as follows:
red
yellow
grey
white
blue
red
pink
violet
white
I want to search... (9 Replies)
Discussion started by: sangitajc
9 Replies
2. Shell Programming and Scripting
I have file with following contents;
127.0.0.1 www.google.com
127.3.3.1 www.cisco.com
127.3.5.1 www.msnbc.com
I want output as
127.0.0.1 www.google.com google.com
127.3.3.1 www.cisco.com cisco.com
127.3.5.1 www.msnbc.com msnbc.com
I tried
sed 's/www.//g'... (5 Replies)
Discussion started by: sangfroid
5 Replies
3. Shell Programming and Scripting
Hi,
I would like to process one file which looks like this :
09-04-16-17:11:53 -> count 1
NAME CHAN QID NMSGS NBYTES MAXBYTES P/T
W_DEALNUM 105 123508770 1 10 14 P
W_APPSTAT 106 123508771 1 12 35 P... (8 Replies)
Discussion started by: vive123
8 Replies
4. Shell Programming and Scripting
Hi All ,
I have a input file which has set of lines like this ::
cat a.txt
unix1 djkdfkjdkkdfkdjfdfkjd 09191091 unix@unix.com <2008-23-07>
unix 2 dfdfdfdfdfdfdfdfdfd
unix3 dfldfljdflkjdfldfkljdfldjfl 0565606 unix1@unix.com <2008-10-09>
unix4 dfdlfndfldflnlffddfd
for some... (4 Replies)
Discussion started by: raghav1982
4 Replies
5. UNIX for Dummies Questions & Answers
I am trying to retrieve part of a line from /boot/grub/menu.lst
The line is :
gfxmenu (hd0,0)/usr/share/gfxboot/themes/pclinuxblue/boot/message
I have figured out how to get this line into a file by itself.
sed '/gfxmenu/ !d' /boot/grub/menu.lst > /tmp/menu.lst.pcl_tc
What I need to... (2 Replies)
Discussion started by: Tide
2 Replies
6. Shell Programming and Scripting
Hi,
I have the following texts :
#1#http://www.google.com#2#Google#3#
#1#http://www.aol.com#2#AOL#3#
I need a bash script which extracts the text between the markers (marks are #1#,#2#,#3#).
I also need that text in variables ($URL and $DESCRIPT will be fine) so I can later use it to... (3 Replies)
Discussion started by: tcp27br
3 Replies
7. Shell Programming and Scripting
Hi,
I have a file in a form of
jkkhjjk1:!:jkhdjkhjkh2:!:kljkljkljklj3:!:kljsdj4
kljlkfljf5:!:kjljljlj6:!:jhjkhjkh7
I am trying to use sed command such that everytime it find ":!:" it will removes it and print remaining of the line on the new line
Output that I need will look like following... (8 Replies)
Discussion started by: arushunter
8 Replies
8. Shell Programming and Scripting
Hi All,
i have one file and in that i have to read each line and do some replacement.
its is not fixed the number or column always be same it can be less also
exm
a;b;c;d;e;f (line)
i have to do something like
In the line
If c is present
then
go to end of line and append ';date'
else... (9 Replies)
Discussion started by: ravi.sadani19
9 Replies
9. Shell Programming and Scripting
Could someone tell me how to replace varibles using SED inside Korn Shell?
e.g. I have a ksh file program.ksh below:
------------------------------------
#!/bin/ksh
sed -n '/ABC/p' $1 > output.txt
if ]
then
status=new
elif ]
then
status=old
fi
sed -n '/$status/p' $1... (5 Replies)
Discussion started by: stevefox
5 Replies
10. UNIX for Dummies Questions & Answers
Hi,
I need to insert a line into a file underneath an existing line in the file, but am unsure as to the syntax. I'm pretty sure sed can be used though, although any ideas are more than welcome. For example:
File
----
Line 1
Line 2
Line 3
Line 4
Line 6
I need to say: Insert "Line 5"... (1 Reply)
Discussion started by: danhodges99
1 Replies
SED(1) General Commands Manual SED(1)
NAME
sed - stream editor
SYNOPSIS
sed [ -n ] [ -g ] [ -e script ] [ -f sfile ] [ file ... ]
DESCRIPTION
Sed copies the named files (standard input default) to the standard output, edited according to a script of commands. The -f option causes
the script to be taken from file sfile; these options accumulate. If there is just one -e option and no -f's, the flag -e may be omitted.
The -n option suppresses the default output; -g causes all substitutions to be global, as if suffixed g.
A script consists of editing commands, one per line, of the following form:
[address [, address] ] function [argument ...]
In normal operation sed cyclically copies a line of input into a pattern space (unless there is something left after a command), applies in
sequence all commands whose addresses select that pattern space, and at the end of the script copies the pattern space to the standard out-
put (except under -n) and deletes the pattern space.
An address is either a decimal number that counts input lines cumulatively across files, a that addresses the last line of input, or a con-
text address, /regular-expression/, in the style of regexp(6), with the added convention that matches a newline embedded in the pattern
space.
A command line with no addresses selects every pattern space.
A command line with one address selects each pattern space that matches the address.
A command line with two addresses selects the inclusive range from the first pattern space that matches the first address through the next
pattern space that matches the second. (If the second address is a number less than or equal to the line number first selected, only one
line is selected.) Thereafter the process is repeated, looking again for the first address.
Editing commands can be applied to non-selected pattern spaces by use of the negation function (below).
An argument denoted text consists of one or more lines, all but the last of which end with to hide the newline. Backslashes in text are
treated like backslashes in the replacement string of an command, and may be used to protect initial blanks and tabs against the stripping
that is done on every script line.
An argument denoted rfile or wfile must terminate the command line and must be preceded by exactly one blank. Each wfile is created before
processing begins. There can be at most 120 distinct wfile arguments.
a
text Append. Place text on the output before reading the next input line.
b label Branch to the : command bearing the label. If label is empty, branch to the end of the script.
c
text Change. Delete the pattern space. With 0 or 1 address or at the end of a 2-address range, place text on the output. Start
the next cycle.
d Delete the pattern space. Start the next cycle.
D Delete the initial segment of the pattern space through the first newline. Start the next cycle.
g Replace the contents of the pattern space by the contents of the hold space.
G Append the contents of the hold space to the pattern space.
h Replace the contents of the hold space by the contents of the pattern space.
H Append the contents of the pattern space to the hold space.
i
text Insert. Place text on the standard output.
n Copy the pattern space to the standard output. Replace the pattern space with the next line of input.
N Append the next line of input to the pattern space with an embedded newline. (The current line number changes.)
p Print. Copy the pattern space to the standard output.
P Copy the initial segment of the pattern space through the first newline to the standard output.
q Quit. Branch to the end of the script. Do not start a new cycle.
r rfile Read the contents of rfile. Place them on the output before reading the next input line.
s/regular-expression/replacement/flags
Substitute the replacement string for instances of the regular-expression in the pattern space. Any character may be used
instead of For a fuller description see regexp(6). Flags is zero or more of
g Global. Substitute for all non-overlapping instances of the regular expression rather than just the first one.
p Print the pattern space if a replacement was made.
w wfile
Write. Append the pattern space to wfile if a replacement was made.
t label Test. Branch to the command bearing the label if any substitutions have been made since the most recent reading of an input
line or execution of a If label is empty, branch to the end of the script.
w wfile
Write. Append the pattern space to wfile.
x Exchange the contents of the pattern and hold spaces.
y/string1/string2/
Transform. Replace all occurrences of characters in string1 with the corresponding character in string2. The lengths of
string1 and string2 must be equal.
!function Don't. Apply the function (or group, if function is only to lines not selected by the address(es).
: label This command does nothing; it bears a label for b and t commands to branch to.
= Place the current line number on the standard output as a line.
{ Execute the following commands through a matching only when the pattern space is selected.
An empty command is ignored.
EXAMPLES
sed 10q file
Print the first 10 lines of the file.
sed '/^$/d'
Delete empty lines from standard input.
sed 's/UNIX/& system/g'
Replace every instance of by
sed 's/ *$// drop trailing blanks
/^$/d drop empty lines
s/ */ replace blanks by newlines
/g
/^$/d' chapter*
Print the files chapter1, chapter2, etc. one word to a line.
nroff -ms manuscript | sed '
${
/^$/p if last line of file is empty, print it
}
//N if current line is empty, append next line
/^
$/D' if two lines are empty, delete the first
Delete all but one of each group of empty lines from a formatted manuscript.
SOURCE
/sys/src/cmd/sed.c
SEE ALSO
ed(1), grep(1), awk(1), lex(1), sam(1), regexp(6)
L. E. McMahon, `SED -- A Non-interactive Text Editor', Unix Research System Programmer's Manual, Volume 2.
BUGS
If input is from a pipe, buffering may consume characters beyond a line on which a command is executed.
SED(1)