I need to assign a variable within a variable in a sed command.
I tried doing the following in c shell.
set left = 1
set right = 2
set segment = qwerty
sed -n -e "/$segment{$left}/,/$segment{$right}/p" file.txt
what is wrong with this syntax? (3 Replies)
Hi,
Is there any way to assign defaults values to the shell variables without reassigning them ( restarting the session)
for example
after login the value of ORACLE_HOME=/a/b/c
i have changed this value from the console
export ORACLE_HOME=/c/d
now what if i want the value exported to... (1 Reply)
Hi GUYS,
I have function. I am assigning a line count to count variable. But it is throwing an error at this line.
function_recur (){
#file being created in this function
lenth = `wc -l function_outpu.dat`;
echo $lenth;
}
this is the error i got
rec.ksh: lenth: not found.
... (3 Replies)
Hi,
I am having a line which is separated by -
I need to extract each field and put into some variable.
a=`echo "this-is-the-case" | awk -F- '{print $1}' `
b=`echo "this-is-the-case" | awk -F- '{print $2}' `
c=`echo "this-is-the-case" | awk -F- '{print $3}' `
d=`echo "this-is-the-case" | awk... (2 Replies)
Hi All,
I have a tcsh script as:
#!/usr/bin/csh -x
set packsName=$(awk -F'' '/^execute.*=true/{print $2}' ExecutePacks.config)
for var in $packsName
do
echo "printed $var"
done
I want to assign the value which is returned by awk function to the variable called packsName.
How do I... (2 Replies)
Hi Gurus,
I have a file named log with 2 lines
Each line is a file name. eg
$ cat log
monday
tuesday
I need to read log and assign each output(filename) to a different variable.
The following doesn't work:-
while read A B
do
echo " a is ${A} "
echo " b is ${B} "
done <... (6 Replies)
Hi! This might be a simple thing, but I'm struggling to assign values to variables from the file.
I've the following values stored in the file.. It consists of only two rows..
10
20
I want to assign the first row value to variable "n1" and the second row value to variable "n2"..
That is ... (3 Replies)
i have variables RECIPIENTS_DEVL,RECIPIENTS_UACC,RECIPIENTS_PROD
i have a case statement to get the phase variable:
case ${WMD_UPHASE1} in
u) WMD_UPHASE4=UACC;;
i) WMD_UPHASE4=DEVL;;
p) WMD_UPHASE4=PROD;;
d) WMD_UPHASE4=DEVL;;
*) WMD_UPHASE4=DEVL;;
esac
I am unable to... (3 Replies)
Hi,
Can the below be clarified please. i just want to know what is the difference between the two ways of assigning variables as mentioned below.
export SRC_TBL=${SRC_TBL-"MMA_COPAY_PLN_FACT_STG"}
export SRC_TBL="MMA_COPAY_PLN_FACT_STG"
thanks in advance :)
Arun (1 Reply)
Discussion started by: Arun Mishra
1 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)
06-16-2005
, 