Greg's Bash & Linux Commands

Bash Commands | Linux Programs | Miscellaneous Things
 

Bash Commands
  • [Ctrl] c
  • a2ps
    • -1
    • -B
  • alias
  • cal
  • cat
  • cd
    • ../
    • ~-
  • clear
  • cp
    • -f
    • -i
  • date
  • df
  • dict
  • diff
  • du
  • exit
  • factor
  • free
  • grep
  • gzip
  • gunzip
  • head
  • history
    • #
    • -c
  • kill
  • less
  • ls
    • -a
    • -A
    • -C
    • -l
    • -o
    • -r
    • -R
    • -S
    • -t
    • --color
  • man
  • mkdir
  • more
  • mount
  • mv
    • -f
    • -i
  • nl
  • passwd
  • pwd
  • rm
    • -f
    • -i
  • rmdir
  • scp
  • tail
  • umount
  • unalias
  • uptime
  • wc
Kills current process
Print (a2ps [file])
    One page per sheet
    Do not print header
Creates command alias (alias [new alias]='command')
Displays calendar (cal [[month] year])
Concatenate files (cat [file1] [file2] > [new file])
Change directory
    One level up
    Previous directory
Clears terminal screen
Copy (cp [file] [to])
    Forces action, ignoring errors and warnings
    Asks for confirmation
Displays date and time
Displays drives and free disk space
Useful dictionary (dict [word])
Outputs the difference between two files (diff [file1] [file2])
Displays disk usage in current directory and subfolders
Exits Bash
Outputs prime factors (factor [number])
Displays memory usage
Searches files with text (grep "text" [file1] [file2]...)
Compresses file (gzip [file])
Decomresses zipped file (gzip [file])
Displays first 10 lines of file (head [file])
Displays your command history
    Displays last # commands in history
    Clears command history
Stop a process from running (kill [process])
Displays file with ability to move around (less [file])
List files
    Show all files (including hidden files)
    Same as -a but without implied . and ..
    List entries in columns
    Use a long listing format
    Do not show group info in long listing format
    Reverse order when sorting
    List subdirectories recursively
    Sort by file size
    Sort by modification time
    Use colors to distinguish file types
Displays help manual about command (man [command])
Make new directory (mkdir [dir name])
Displays file (more [file])
Mount a file system (floppy: mount /floppy)
Move (mv [file] [to])
    Forces action, ignoring errors and warnings
    Asks for confirmation
View file with lines numbered (nl [file])
Modify a user password
Displays current directory
Removes file (rm [file])
    Forces action, ignoring errors and warnings
    Asks for confirmation
Removes directory
Securely copies files (scp [from] [to]:[file name])
Displays last 10 lines of file (tail [file])
Unmounts a file system (undoes mount command)
Removes an alias (unalias [alias name])
Displays time since system last booted
Print byte, word, and line counts (wc [file])
 
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Linux Programs
  • emacs
  • gv
  • nano
  • pico
  • xfig
  • xcalc
  • xclock
    • -d
    • -update
  • xpdf
  • xv
Advanced text editor
Postscript and PDF viewer
Text editor
Text editor
Vector drawing program
Calculator
Displays clock
    Displays in digital format
    Updates display every XX seconds (-update [XX])
PDF viewer
Picture editor
 
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Miscellaneous Things
  • *
  • ?
  • ~
  • &
  • ;
  • > [file]
  • >> [file]
  • | [command]
Wildcard for a set of characters
Wildcard for a single character
Specifies a user's home directory (~[user])
Runs program in background ([program] &)
    NB: This allows continued use with Bash while program runs
Used between commands ([command1];[commmand2];...)
Inserts output into file
Concatenates output into file
Pipes screen output to command (such as more, less, wc, etc.)
 
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Greg Caravelli
gjc at jhu.edu
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