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I tried below three commands. None returned the verion. Output of $KSH_VERSION is blank

ksh --version

ksh: ksh: --: unknown option

echo "${.sh.version}"

bash: ${.sh.version}: bad...

Team,

I have two files and I am trying to find the lines unique to file1. So i have executed the below command at shell prompt and got the correct results

comm -23 <(sort test) <(sort test1)...