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Function: make links between files
Usage: ln [OPTION]... [-T] TARGET LINK_NAME
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Function: update user’s authentication tokens
Usage: passwd [-k] [-l] [-u [-f]] [-d] [-e] [-n mindays] [-x maxdays] [-w warndays] [-i inactivedays] [-S] [--stdin] [username]
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Function: print user's login name
Usage: logname [OPTION]
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Function: copy files and directories
Usage: cp [OPTION]... SOURCE... DIRECTORY
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Function: mount a filesystem
Usage: mount [-fnrsvw] [-o option[,option]...] device|dir
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Function: print system information
Usage: uname [OPTION]...
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Function: queue, examine or delete jobs for later execu-tion
Usage: at [-V] [-q queue] [-f file] [-mMlbv] TIME
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Function: join lines of two files on a common field
Usage: join [OPTION]... FILE1 FILE2
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Function: Print network connections, routing tables, interface statis-tics, masquerade connections, and multicast memberships
Usage: netstat {--interfaces|-I|-i} [iface] [--all|-a] [--extend|-e] [--ver-bose|-v] [--program|-p] [--numeric|-n] [--numeric-hosts][--numeric-ports][--numeric-ports] [--continuous|-c] [delay]
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Function: move (rename) files
Usage: mv [OPTION]... SOURCE... DIRECTORY
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Function: print name of current/working directory
Usage: pwd [OPTION]...
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Function: file perusal filter for crt viewing
Usage: more [-dlfpcsu] [-num] [+/pattern] [+linenum] [file ...]
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Function: change file timestamps
Usage: touch [OPTION]... FILE...
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Function: kill processes by name
Usage: killall -l
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Function: check and repair a Linux file system
Usage: fsck [-sAVRTMNP] [-C [fd]] [-t fstype] [filesys...] [--] [fs-specific-options]