UNIQ(1) General Commands Manual UNIQ(1) (NAME) uniq - (SYNOPSIS) uniq [OPTION]... [INPUT [OUTPUT]] (DESCRIPTION) . (OPTIONS) -D, --all-repeated[=] . . [: none] : o none o prepend o separate --group[=] . [: separate] : o separate o prepend o append o both -w, --check-chars N -c, --count -i, --ignore-case -d, --repeated -s, --skip-chars N -f, --skip-fields N -u, --unique -z, --zero-terminated 0 -h, --help -V, --version (EXTRA) INPUT ( ) OUTPUT ( ). : uniq . (sort) sort -u uniq . (VERSION) v(uutils coreutils) 0.11.0 2026-09-01 UNIQ(1)