Piping the * through ls accomplishes nothing you couldn't have accomplished without it, except possibly scrambling any filenames with whitespace in them -- backticks split across all whitespace, not newlines.
...or even:
What does the '' do? I don't understand the meaning of the blank expression, but if you say it works...
I have tried everything I can think of to get sed to change line N of a file to the contents of a variable. I have Googled the Internet, and I find lots of people telling how to use variables with the "Substitute" command, but no one telling how to use variables with the "Change" command.
I... (4 Replies)
Greetings!
Basically, I would like to properly handle this with gnu make:
alltools: my_tool mysecond_tool mythird_tool etc_tool
%_tool: dir1/%_tool.vf dir2/%_tool/subdir2/%_tool.ver
<tab>@echo done
%.vf:
<tab>RUN_VF $*
%.ver:
<tab>RUN_VER $*
So, if I were to do something like:... (0 Replies)
Hello,
Im working on this problem for 3 days now and i just cant get it to work.. I tried with alot of different sed methods but didnt find any solution. Its proberly verry simple but i just started bash scripting for a month or so..
i have a file called: file.nfo and file.txt
the content... (4 Replies)
This i will print the second line of a file
sed -n '2p' test2
The use of a variable is impossible here.
a=1
while ; do
line=`sed -n '$a p' test2`
# do some things here with the line variable
a=`expr $a + 1`
done
But the uotput of sed command is 'p'..... What can i do to use a variable... (2 Replies)
Ok, so, let's say I have the variable $GMAILID....How can I use it with sed command so to replace a string in a file? e.g.:
sed -i 's/$GMAILID/test@gmail.com/' /home/$USER/Desktop/sendmail (4 Replies)
Hi,
I have a small piece of Makefile script which throw's error on Sun Sparc machine, but works fine with Sun Optron, Linux, AIX machines.
FOO=Naveen
test1:FOO=Dhilip
test1:
@echo FOO is ${FOO}
test2:
@echo Me is ${FOO}
Output on Sun Sparc -
ukhml-v890new-~/test: make test1... (5 Replies)
Hi all,
Hereby wish to have your advise for below:
Main concept is
I intend to get current directory of my script file.
This script file will be copied to /etc/init.d.
A string in this copy will be replaced with current directory value.
Below is original script file:
... (6 Replies)
Hi,
I am trying to replace the value of a variable in a file through another script.
Example:
Filename : abc.txt contents:
a=10
b=20
c=30
Need to change the value of, say, b - Tried using the following:
sed "s/${b}/15/g" abc.txt
Have tried various forms of sed (with single quotes,... (4 Replies)
Hi all,
I have a script that creates folders depending on what variables i enter when calling the script. This all works as expected but what i want to do is add some additional data into another file so that other scripts are aware of this file.
I've found the following sed command which... (12 Replies)
Hi,
I wanted to configure new iscsi port on HPUX system, i added the target port address and configured it, once done, went to array side and searched for that host iqn number , but was nt able to find the same, came to host, then when i ran "iscsiutil -pVS" command it gave me below result
... (0 Replies)
Discussion started by: Vinay Kumar D
0 Replies
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)