UnixCommands

Unix

UnixCommands/Kill

UnixCommands/Cat

UnixCommands/Screen

Compression

Filters

Redirection

Chmod

ViewFiles

VIvisualEdit

SedStreamEditor

AwkPatternMatching

SinkFiles

• ManPages

Command/Syntax What it will do

• awk / nawk [options] file scan for patterns in a file and process the results
• cat [options] file concatenate (list) a file
• cd [directory] change directory
• chgrp [options] group file change the group of the file
• chmod [options] file change file or directory access permissions
• chown [options] owner file change the ownership of a file; can only be done by the superuser
• chsh (passwd -e/-s) username login_shell change the user's login shell (often only by the superuser)
• cmp [options] file1 file2 compare two files and list where differences occur (text or binary files)
• compress [options] file compress file and save it as file.Z
• cp [options] file1 file2 copy file1 into file2; file2 shouldn't already exist. This command creates or overwrites file2.
• cut (options) [file(s)] cut specified field(s)/character(s) from lines in file(s)
• date [options] report the current date and time
• dd [if=infile] [of=outfile] [operand=value] copy a file, converting between ASCII and EBCDIC or swapping byte order, as specified
• diff [options] file1 file2 compare the two files and display the differences (text files only)
• df [options] [resource] report the summary of disk blocks and inodes free and in use
• du [options] [directory or file] report amount of disk space in use
• echo [text string] echo the text string to stdout
• ed or ex [options] file Unix line editors
• emacs [options] file full-screen editor
• expr arguments evaluate the arguments. Used to do arithmetic, etc. in the shell.
• file [options] file classify the file type
• find directory [options] [actions] find files matching a type or pattern
• finger [options] user[@hostname] report information about users on local and remote machines
• ftp [options] host transfer file(s) using file transfer protocol
• grep [options] 'search string' argument
• egrep [options] 'search string' argument
• fgrep [options] 'search string' argument, search the argument (in this case probably a file) for all occurrences of the search string, and list them.
• gzip [options] file
• gunzip [options] file
• zcat [options] file, compress or uncompress a file. Compressed files are stored with a .gz ending
• head [-number] file display the first 10 (or number of) lines of a file
• [[hostname display]] or set (super-user only) the name of the current machine
• kill [options] [-SIGNAL] [pid#] [%job] send a signal to the process with the process id number (pid#) or job control number (%n). The default signal is to kill the process.
• ln [options] source_file target link the source_file to the target
• lpq [options]
• lpstat [options], show the status of print jobs
• lpr [options] file
• lp [options] file, print to defined printer
• lprm [options]
• cancel [options], remove a print job from the print queue
• ls [options] [directory or file] list directory contents or file permissions
• mail [options] [user]
• mailx [options] [user]
• Mail [options] [user], simple email utility available on Unix systems. Type a period as the first character on a new line to send message out, question mark for help.
• man [options] command show the manual (man) page for a command
• mkdir [options] directory make a directory
• more [options] file
• less [options] file
• pg [options] file page through a text file
• mv [options] file1 file2 move file1 into file2
• od [options] file octal dump a binary file, in octal, ASCII, hex, decimal, or character mode.
• passwd [options] set or change your password
• paste [options] file paste field(s) onto the lines in file
• pr [options] file filter the file and print it on the terminal
• ps [options] show status of active processes
• [[pwd print]] working (current) directory
• rcp [options] hostname remotely copy files from this machine to another machine
• rlogin [options] hostname login remotely to another machine
• rm [options] file remove (delete) a file or directory (-r recursively deletes the directory and its contents) (-i prompts before removing files)
• rmdir [options] directory remove a directory
• rsh [options] hostname remote shell to run on another machine
• script file saves everything that appears on the screen to file until exit is executed
• sed [options] file stream editor for editing files from a script or from the command line
• sort [options] file sort the lines of the file according to the options chosen
• source file
• [[.]] file read commands from the file and execute them in the current shell. source: C shell, .: Bourne shell.
• strings [options] file report any sequence of 4 or more printable characters ending in <NL> or <NULL>. Usually used to search binary files for ASCII strings.
• stty [options] set or display terminal control options
• tail [options] file display the last few lines (or parts) of a file
• tar key[options] [file(s)] tape archiver--refer to man pages for details on creating, listing, and retrieving from archive files. Tar files can be stored on tape or disk.
• tee [options] file copy stdout to one or more files
• telnet [host [port]] communicate with another host using telnet protocol
• touch [options] [date] file create an empty file, or update the access time of an existing file
• tr [options] string1 string2 translate the characters in string1 from stdin into those in string2 in stdout
• uncompress file.Z uncompress file.Z and save it as a file
• uniq [options] file remove repeated lines in a file
• uudecode [file] decode a uuencoded file, recreating the original file
• uuencode [file] new_name encode binary file to 7-bit ASCII, useful when sending via email, to be decoded as new_name at destination
• vi [options] file visual, full-screen editor
• wc [options] [file(s)] display word (or character or line) count for file(s)
• whereis [options] command report the binary, source, and man page locations for the command named
• which command reports the path to the command or the shell alias in use
• who or w report who is logged in and what processes are running
• zcat file.Z concatenate (list) uncompressed file to screen, leaving file compressed on disk

<tasks> [ ] needs wiki formatting,table </tasks>