10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I want to delete all matches in a text following this pattern:
Each match starts with linux-
Each match ends with a space
(Remove linux-* until immediate next space)
EXAMPLE:
From this text:
ibudev1 libudev1 libweather-ion7 libxatracker2 linux-generic linux-headers-generic... (4 Replies)
Discussion started by: Tribe
4 Replies
2. Shell Programming and Scripting
I have a file comp.pkglist which mention package version and release . In 'version change' and 'release change' line there are two versions 'old' and 'new' Version Change: --> Release Change: -->
cat comp.pkglist
Package list: nss-util-devel-3.28.4-1.el6_9.x86_64
Version Change: 3.28.4 -->... (1 Reply)
Discussion started by: Paras Pandey
1 Replies
3. Shell Programming and Scripting
Hi all,
I have this input:
"203324780",,"89321213261247090146","VfdsD150","0D","fd3221","V0343","aaa","Direkt","fsa","2015.02.27","39833,54454,21214",,,"fd","NORMAL","D","10fd","1243 Flotta","HiĂĄnytalan","2013.02.25",,"2013.02.25","2013.02.24","2013.02.28",,"SajĂĄt... (4 Replies)
Discussion started by: snayper
4 Replies
4. Shell Programming and Scripting
Dear All,
Can anyone help to remove the , bewteen "" in a string by using sed or awk?
e.g.
input : 1,4,5,"abcdef","we,are,here",4,"help hep"
output:1,4,5,"abcdef","wearehere",4,"help hep"
Thanks,
Mimi (5 Replies)
Discussion started by: mimilaw
5 Replies
5. Shell Programming and Scripting
Hello All,
I am running a command find . -name amp.cfg | cut -c 3- which gives me output something like below
rel/prod/amp.cfg
rel/fld/amp.cfg
deb/detail/amp.cfg
deb/err/amp.cfg I want to remove trailing "/amp.cfg" so that i should get output something like... (7 Replies)
Discussion started by: anand.shah
7 Replies
6. Shell Programming and Scripting
Hello!
Please bare with me, I'm a total newbie to scripting. Here's the sudo code of what I'm trying to do:
Get file name
Does file exist?
If true
get length of file name
get network id (this will be the last 3 numbers of the file name)
loop x 2
If... (1 Reply)
Discussion started by: KatieV
1 Replies
7. Shell Programming and Scripting
Hi guys,
I have been trying to play with sed to accomplish this but I just can't quite get it right.
I need to be able to remove the year from a string held in a variable in my bash script.
The string may have multiple words but always ends with a year such as (2009)
for example:
... (2 Replies)
Discussion started by: tret
2 Replies
8. Shell Programming and Scripting
seems easy but havent found in other posts...
i want to delete any spaces if found before first occurence of ${AI_RUN}
sed 's/ *\\$\\{AI_RUN\\}/\\$\\{AI_RUN\\}/' $HOME/temp1.dat
i think i'm close but can't put my finger on it. :rolleyes: (6 Replies)
Discussion started by: danmauer
6 Replies
9. Shell Programming and Scripting
Hi,
My knowledge about sed is limited but I have a problem that I think can be solved with sed.
I have a variable in a shell script that stores a lot of path/filenames and the delimitter between them is a space (they all exist on the same line). One part of the filename is the file creation... (4 Replies)
Discussion started by: pcrs
4 Replies
10. Shell Programming and Scripting
Hello,
I have the following to remove spaces from beginning and end of a string.
infile=`echo "$infilename" | sed 's/^ *//;s/ *$//`
How do I modify the above code to remove spaces from beginning, end and in the middle of the string also.
ex:
... (4 Replies)
Discussion started by: radhika
4 Replies
sed(1) General Commands Manual sed(1)
Name
sed - stream text editor
Syntax
sed [-n] [-e script] [-f sfile] [file...]
Description
The command copies the named files (standard input default) to the standard output, edited according to a script of commands. The -f
option causes the script to be taken from file sfile; these options accumulate. If there is just one -e option and no -f's, the flag -e
may be omitted. The -n option suppresses the default output; inclusion in the script of a comment command of the form also suppresses the
default output. (See the description of the `#' command.)
A script consists of editing commands of the following form:
[address [, address] ] function [arguments]
Nominally, there is one command per line; but commands can be concatenated on a line by being separated with semicolons
In normal operation cyclically copies a line of input into a pattern space (unless there is something left after a `D' command), applies in
sequence all commands whose addresses select that pattern space, and at the end of the script copies the pattern space to the standard out-
put (except under -n) and deletes the pattern space.
An address is either a decimal number that counts input lines cumulatively across files, a `$' that addresses the last line of input, or a
context address, `/regular expression/', in the style of ed(1) modified thus:
o In a context address, the construction ?regular expression?, where ? is any character, is identical to regular expression. Note
that in the context address xabcxdefx, the second x stands for itself, so that the regular expression is abcxdef.
o The escape sequence `
' matches a new line embedded in the pattern space.
o A command line with no addresses selects every pattern space.
o A command line with one address selects each pattern space that matches the address.
o 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 only to non-selected pattern spaces by use of the negation function `!' (below).
In the following list of functions the maximum number of permissible addresses for each function is indicated in parentheses.
An argument denoted text consists of one or more lines, all but the last of which end with `' to hide the new line. Backslashes in text
are treated like backslashes in the replacement string of an `s' 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 10 distinct wfile arguments.
(1)a
text
Append. Place text on the output before reading the next input line.
(2)b label
Branch to the `:' command bearing the label. If label is empty, branch to the end of the script.
(2)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.
(2)d Delete the pattern space. Start the next cycle.
(2)D Delete the initial segment of the pattern space through the first new line. Start the next cycle.
(2)g Replace the contents of the pattern space by the contents of the hold space.
(2)G Append the contents of the hold space to the pattern space.
(2)h Replace the contents of the hold space by the contents of the pattern space.
(2)H Append the contents of the pattern space to the hold space.
(1)i
text
Insert. Place text on the standard output.
(2)n Copy the pattern space to the standard output. Replace the pattern space with the next line of input.
(2)N Append the next line of input to the pattern space with an embedded new line. (The current line number changes.)
(2)p Print. Copy the pattern space to the standard output.
(2)P Copy the initial segment of the pattern space through the first new line to the standard output.
(1)q Quit. Branch to the end of the script. Do not start a new cycle.
(2)r rfile
Read the contents of rfile. Place them on the output before reading the next input line.
(2)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 more complete description see The flags is zero or more of
g Global. Substitute for all nonoverlapping 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.
(2)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 `t'. If label is empty, branch to the end of the script.
(2)w wfile
Write. Append the pattern space to wfile.
(2)x Exchange the contents of the pattern and hold spaces.
(2)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.
(2)! function
Don't. Apply the function (or group, if function is `{') only to lines not selected by the address(es).
(0): label
This command does nothing; it bears a label for `b' and `t' commands to branch to.
(1)= Place the current line number on the standard output as a line.
(2){ Execute the following commands through a matching `}' only when the pattern space is selected.
(0) An empty command is ignored.
(0)# With one exception, any line whose first nonblank character is a number sign is a comment and is ignored. The exception is that if
the first such line encountered contains only the number sign followed by the letter `n' the default output is suppressed as if the
-n option were in force.
Options
-e 'command;command...'
Uses command;command... as the editing script. If no -f option is given, the -e keyword can be omitted. For example, the follow-
ing two command are functionally identical:
% sed -e 's/DIGITAL/Digital/g' summary > summary.out
% sed 's/DIGITAL/Digital/g' summary > summary.out
-f sfile
Uses specified file as input file of commands to be executed. Can be used with -e option to apply both explicit commands and a
separate script file.
-n Suppresses all normal output, writing only lines explicitly written by the `p' or `P' commands or by an `s' command with the `p'
flag.
See Also
awk(1), ed(1), grep(1), lex(1)
sed(1)