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Try
sed -e "s/\(.*TRANSFER TO\).*\(\/usr\)/\1 $var \2/"

To "translate" $var into it's value
To also pick the slash "/" from usr

:(
Looks like your csh's built-in test operator does not support "-s", try this
set host=0
if ( /bin/test -s /usr/bin/1234.xcf ) set host="something"
If it doesn't work, try it even with curly...

Looks like you have already defined it correctly, when you were talking about "reads entire content in-memory".


Why not? :D

However I tested following and it worked, but there is at least one...

I've created a file with 1.000.000 lines and run a while read line loop. When the loop was processing the ~150.000 line, I deleted the processed file from another terminal and the while loop did not...

Try this ..
ls -l /etc/*.txt > /dev/null 2>&1; result=$?

# check result
if [ $result -ne 0 ]; then
echo "command failed "
else
echo "command succeeded "
fi

If you are bent on using...