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bashshellunixunix-timestamp

How to subtract today's date with a file's modification date in unix?

For example: echo $(date) - $(date -r sample.txt)

Output: 90 days(for example)

Solution

  • Use %s seconds since 1970-01-01 00:00:00 UTC as in 

    echo $(expr $(date +%s) - $(date -r sample.txt +%s)) #!/bin/sh
echo $(($(date +%s) - $(date -r sample.txt +%s))) #/bin/bash