In /usr/bin/prelude-adduser line 7: libdir=${prefix}/lib/x86_64-linux-gnu ^----^ SC2034: libdir appears unused. Verify use (or export if used externally). In /usr/bin/prelude-adduser line 9: datadir=${datarootdir} ^-----^ SC2034: datadir appears unused. Verify use (or export if used externally). In /usr/bin/prelude-adduser line 16: $bindir/prelude-admin $@ ^-- SC2068: Double quote array expansions to avoid re-splitting elements. For more information: https://www.shellcheck.net/wiki/SC2068 -- Double quote array expansions to ... https://www.shellcheck.net/wiki/SC2034 -- datadir appears unused. Verify us...