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Report disk usage by file type$ find . -type f -empty -prune -o -type f -printf "%s\t" -exec file --brief --mime-type '{}' \; | awk 'BEGIN {printf("%12s\t%12s\n","bytes","type")} {type=$2; a[type]+=$1} END {for (i in a) printf("%12u\t%12s\n", a[i], i)|"sort -nr"}' |
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Read other user's shell history, and convert epoch to human-readable date$ cat /home/john/.bash_history | awk '/#[0-9]*$/ {split($0, arr, "#"); print "#", strftime("%c",arr[2]);getline; print; }' |