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How long does a variable in a shell script last?

How long does a variable in a shell script last?

Asked On2022-01-12 06:14:47 by:shwet0710

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Shell programming or shell scripting consists of most of the features that modern programming languages have to offer. Any script, simple to complex, can be developed using Shell scripting. It is a series of UNIX commands written to accomplish a particular task using a plain text file. Tasks of day-to-day life can be automated with the help of shell scripting. 

If you are new to the concepts of Unix, shell, and Perl, read it here. If you have knowledge about shell scripting and have to face a related job interview, then this shell scripting interview questions and answer article will help you with the top shell scripting interview questions that can make your preparation easy.

Answerd on:2022-06-29 Answerd By:nalimela-vamshi


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you can't, but you can use a file to do it

# if we don't have a file, start at zero
if [ ! -f "/tmp/value.dat" ] ; then

# otherwise read the value from the file
  value=`cat /tmp/value.dat`

# increment the value
value=$((value + 1))

# show it to the user
echo "value: ${value}"

# and save it for next time
echo "${value}" > /tmp/value.dat

Answerd on:2022-02-12 Answerd By:Suresha-N

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