sergiitk

Useful shell tools (BSD)

Strings

• l | tail +2 — Skip first line of stdout
• l | head -n-1 — Skip last line of stdout (GNU version only)
• echo "test" | head -c-1 — Remove last newline
• comm -12 <(echo 1; echo 2) <(echo 1; echo 2; echo 3) — Shows intersection (here 1 2).
• cat template.txt | envsubst — substitutes environment variables in file
• echo 123abc | od -c -t d1 — Show decimal dump
• echo 123abc | xxd — Show a hexdump (or do the reverse)