Help with variable substition in sed Post: 302529789

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

how does this substition work?

Hi all, Would like to know how these substitution works?? FINISHED="Done" x=126 COLS=$((${x} -${#FINISHED} - 5)) here does the #FINISHED give the ascii value of "done" ,or how does it work? Thanks

2. Shell Programming and Scripting

Sed variable substitution when variable constructed of a directory path

Hello, i have another sed question.. I'm trying to do variable substition with sed and i'm running into a problem. my var1 is a string constructed like this: filename1 filerev1 filepath1 my var2 is another string constructed like this: filename2 filerev2 filepath2 when i do...

3. UNIX for Dummies Questions & Answers

Perl Substition with multiple conditions

I have a text file that contains lines similar to the following: ----------------------------------------------------------- fall for setup CSHRC0 'gnd'; CSHR0 'gnd'; rise for setup rise for hold CSHRC0 'gnd'; CSHR0 'gnd'; fall for hold ...

4. Shell Programming and Scripting

Command substition with KSH

$var=`command <arg> <arg>` I thought there was another method $var=$(command <arg> <arg>) I thought I read saw the second example. It doesnt work

5. Shell Programming and Scripting

Insert a line including Variable & Carriage Return / sed command as Variable

I want to instert Category:XXXXX into the 2. line something like this should work, but I have somewhere the wrong sytanx. something with the linebreak goes wrong: sed "2i\\${n}Category:$cat\n" Sample: Titel Blahh Blahh abllk sdhsd sjdhf Blahh Blah Blahh Blahh Should look like...

6. UNIX for Advanced & Expert Users

Regular expression / regex substition on Unicode text

I have a large file encoded in Unicode that I need to convert to CSV. In general, I know how to do this by regular expression substitutions using sed or Perl, but one problem I am having is that I need to put a quotation mark at the end of each line to protect the last field. The usual regex...

7. Shell Programming and Scripting

Expand an environment variable in sed, when the variable contains a slash

I'm trying to make a sed substitution where the substitution pattern is an environment variable to be expanded, but the variable contains a "slash". sed -e 's/<HOME_DIRECTORY>/'$HOME'/'This gives me the following error: sed: -e expression #1, char 21: unknown option to `s'Obviously this is...

8. Shell Programming and Scripting

sed and variable

Hello i would like to interpret a variable in this command cnt=3 sed -n '${cnt}p' file.txt sed: 0602-403 `${cnt}`p is not a recognized function. can you help me please ? thanks

9. Red Hat

How to pass value of pwd as variable in SED to replace variable in a script file

Hi all, Hereby wish to have your advise for below: Main concept is I intend to get current directory of my script file. This script file will be copied to /etc/init.d. A string in this copy will be replaced with current directory value. Below is original script file: ...

10. Shell Programming and Scripting

sed substition within XML tag

Hi all, I basically want to remove certain characters from within a certain XML tag: From: <mytagone>hello 1-2-3 world</mytagone> <mytagtwo>hello 1-2-3 world</mytagtwo> To: <mytagone>hello 1 2 3 world</mytagone> <mytagtwo>hello 1-2-3 world</mytagtwo> Is this possible using sed...

LEARN ABOUT LINUX

shtool-subst

SHTOOL-SUBST.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-SUBST.TMP(1)

NAME

       shtool-subst - GNU shtool sed(1) substitution operations

SYNOPSIS

       shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext]
       [-e|--exec cmd] [-f|--file cmd-file] [file] [file ...]

DESCRIPTION

       This command applies one or more sed(1) substitution operations to stdin or any number of files.

OPTIONS

       The following command line options are available.

       -v, --verbose
	   Display some processing information.

       -t, --trace
	   Enable the output of the essential shell commands which are executed.

       -n, --nop
	   No operation mode. Actual execution of the essential shell commands which would be executed is suppressed.

       -w, --warning
	   Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution
	   operations resulted in no content change on all files.

       -q, --quiet
	   Suppress warning on substitution operation resulting in no content change.

       -s, --stealth
	   Stealth operation. Preserve timestamp on file.

       -i, --interactive
	   Enter interactive mode where the user has to approve each operation.

       -b, --backup ext
	   Preserve backup of original file using file name extension ext.  Default is to overwrite the original file.

       -e, --exec cmd
	   Specify sed(1) command directly.

       -f, --file cmd-file
	   Read sed(1) command from file.

EXAMPLE

	#   shell script
	shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch]

	#    RPM spec-file
	%install
	    shtool subst -v -n 
		-e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g' 
		-e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g' 
		`find . -name Makefile -print`
	    make install

HISTORY

       The GNU shtool subst command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 2001 for GNU shtool.  It was prompted
       by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications.

SEE ALSO

       shtool(1), sed(1).

18-Jul-2008							   shtool 2.0.8 					       SHTOOL-SUBST.TMP(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

how does this substition work?

Discussion started by: wrapster

2. Shell Programming and Scripting

Sed variable substitution when variable constructed of a directory path

Discussion started by: alrinno

3. UNIX for Dummies Questions & Answers

Perl Substition with multiple conditions

Discussion started by: EDALBNUG

4. Shell Programming and Scripting

Command substition with KSH

Discussion started by: popeye