Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [W] [Y] [Z] package management Debian distributions apt [See apt utility.] downloadable packages, finding handling dependencies [See apt utility.] RPM-based distributions handling dependencies [See yum (Yellow Dog Updater, Modified), yum install command.] installing packages removing packages pagers Parent Process ID (PPID) number paths current directory path, displaying finding period (.) permission characters permissions 2nd alphabetic notation, modifying with file attributes, abbreviations for listing numeric notation recursive application to files and directories sticky bit, setting and clearing suid, setting and clearing PID (process ID) number ping command pipe (|) PPID (Parent Process ID) number printing command-line compatible formats CUPS [See default printer, CUPS, canceling print jobs to.] process ID (PID) number process trees programs, non-pipable ps command grep, using with piping output to grep process trees STAT letters user-owned processes ps2pdf command pump command pwd command |