...file contains a list of locations from which to retrieve desired package files. See also apt_preferences (5) for a mechanism for overriding the general settings for individual p…...f (5), apt-config (8), apt-patterns (7), The APT User's guide in /usr/share/doc/apt-doc/, apt_preferences (5), the APT Howto. DIAGNOSTICS apt returns zero on normal operation, d…...a repository owner should always ensure correctness. Further more user configuration like apt_preferences (5) can depend and make use of this information. Since version 1.5 the …query the APT cache NAME apt-cache - query the APT cache SYNOPSIS apt-cache [ -agipns ] [ -o= config_string ] [ -c= config_file ] {gencaches | showpkg pkg ... | showsrc pkg ... | s…APT CD-ROM management utility NAME apt-cdrom - APT CD-ROM management utility SYNOPSIS apt-cdrom [ -rmfan ] [ -d= cdrom_mount_point ] [ -o= config_string ] [ -c= config_file ] {add …APT Configuration Query program NAME apt-config - APT Configuration Query program SYNOPSIS apt-config [ --empty ] [ --format ' %f "%v";%n ' ] [ -o= config_string ] [ -c= config_fil…show, set and unset various settings for a package NAME apt-mark - show, set and unset various settings for a package SYNOPSIS apt-mark { -f= filename | {auto | manual} pkg ... | {…let packages ask questions prior to their installation NAME dpkg-preconfigure - let packages ask questions prior to their installation SYNOPSIS dpkg-preconfigure [options] package.…select a timezone NAME tzselect - select a timezone SYNOPSIS tzselect [ - c coord ] [ - n limit ] [ - - help ] [ - - version ] DESCRIPTION The tzselect program asks the user for in…