Using set -A write a script to print the output of the ls
command in 5 columns with two spaces between each column.
Pretend that ls does not have multicolumn output.
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Script S1 (which copies .dat files from one directory1 to another directory2) run continuously. Write Script S2 which kills S1 first, compresses all .dat files in directory1 and directory2 successfully, re-run Script S1 and stops self i.e. S2.
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