I'm not exactly certain what it is you're trying to do, so hopefully some general advice might be of use:
To change the first instance of "a" to "b" on _every_ line:
]
To change the first instance of "a" to "b" in a file:
In sed's substitution command, an empty regular expression is equal to the most recent regular expression used, so "s/a/b/" could have been written as "s//b/".
Hello
I got a cycle in the script which open another scripts.
if
then
action
fi
Scripts action will be running 2 times at the same time.
Inside of action() is insert into the table.
But what I want is that only first script can do insert into table.
So how to do... (2 Replies)
Hello,
I have files in a dir.
I what to create a FOR cycle that will do this
FOR <condition> do
file=`ls <directory> | tail -1`
echo $file
mv -f $file <another dir>
done
What I want to now is what should I put in the <condition>. The condition I want is that the FOR will execute... (3 Replies)
hello everybody,
I need help on putting a wildcard match inside an if condition (I'm using korn shell):
if ]
then echo ' '
echo ''$MYSEL' is not a correct option'
echo ' '
else .....
i tried also #if -ne "``" and a lot of combinations of `"' but I didn't find the... (2 Replies)
Hello,
I have a question:
is there a way to have a "for" cycle done a certain number of times. For example in c++ I can do this:
for (i=o;i<10;i++)
and the cycle will be repeated 10 times.
in UNIX for example I do this:
for i in `cat /etc/host` do done
and the cycle will be repeated... (6 Replies)
i have a question how to modify below script to generate the expect result below :
test.sh
#!/bin/bash
for ((i=0; i < 25; i++))
do
echo $1$i
done
current result:
test.sh 20090101
200901010
200901011
200901012
200901013
200901014
200901015
200901016
200901017
200901018 (2 Replies)
Hi,
i would like to insert a if-then-else function in to cycle for
--------------
cat test
--------------
# cat test
ALFA
BETA
GAMMA
-----------------------
This is my script:
#!/bin/bash
for i in $(cat test); if ; then
echo "ok"
else (5 Replies)
Dear all,
I want to create a table using a shell script. Hope someone can help.
I created a variable that contains the path for different files.
For all the files I want to do calculations and print it to stdout (or file) as a table.
I tried this code:
paths=`cat $tabdelim_file | awk... (7 Replies)
Discussion started by: Higgo
7 Replies
LEARN ABOUT DEBIAN
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)