Out of neat one-liners I never use but sound good on paper? timestamp() { while IFS= read -r line; do printf '[%s] %s\n' "$(date '+%F %T.%4N')" "$l

Out of neat one-liners I never use but sound good on paper? timestamp() { while IFS= read -r line; do printf '[%s] %s\n' "$(date '+%F %T.%4N')" "$line"; done } This prepends a timestamp in front of the output of a command, useful for long-running commands, and logging (e.g. "while sleep .1; do echo openssl rand -hex 8; done | timestamp"). Out of scripts I actually use a lot? Boring stuff like "refactor": sedescape_regex() { printf '%s' "$@" | sed 's/[^^]/[&]/g; s/\^/\\^/g' } sedescape_subst() { printf '%s' "$@" | sed 's/[&/\]/\\&/g' } regex="$(sedescape_regex "$1")"; shift subst="$(sedescape_subst "$1")"; shift grep -rwl \ --include='*.sh' \ --include='*.c' --include='*.h' \ --include='*.asm' --include='*.inc' \ --include='*.s' --include='*.i' \ --include='*.ld' \ --include='*.md' \ "$regex" "$@" | xargs -t sed -i "s/\<$regex\>/$subst/g" This one is obviously less useful for languages with namespaces, hence why --include currently only really has C and a few Assembly flavors. I wish there was a CLI "refactor" tool that supported LSP, without needing a heavy editor to do that.