MAC Terminal Operations Command

Directory Operations

command name	function Description	Examples of Use
Mkdir	Create a Directory	mkdir dirname
RmDir	Delete a directory	RmDir dirname
Mvdir	Move or rename a directory	Mvdir Dir1 Dir2
Cd	Change the current directory	CD dirname
Pwd	Displays the path name of the current directory	Pwd
Ls	Display the contents of the current directory	Ls-la
dircmp	Compare the contents of two directories	DIRCMP Dir1 Dir2

File operations

command name	feature description	use example
cat	show or connect files	cat filename
pg	page format display file contents	pg filename
more	split screen display file contents	more filename
od	Show Non- Content of the text file	od-c filename
cp	Copy file or directory	CP file1 file2
rm	Delete a file or directory	rm filename
mv	Change the file name or directory	mv File1 file2
ln	join file	ln-s file1 file2
Find	find files using matching expressions	find.-name "*.c"-print
file	display files of type	file filename
Open	opening a file with the default program	open filename

Select action

command name	function Description	Examples of Use
Head	Show the first few lines of a file	head-20 filename
Tail	Display the last few lines of a file	tail-15 filename
Cut	Display some fields in each row of a file	Cut-f1,7-d:/etc/passwd
Colrm	Remove several columns from standard input	COLRM 8 File2
Paste	Cross-connect files	Paste File1 file2
Diff	Compare and display the differences of two files	diff File1 File2
Sed	Non-interactive mode flow editor	Sed "s/red/green/g" filename
Grep	Find in Files by pattern	grep "^[a-za-z]" filename
Awk	Find and manipulate patterns in files	awk ' {print '} ' filename
Sort	Sort or Merge files	sort-d-f-u File1
Uniq	Remove duplicate rows from a file	Uniq file1 file2
Comm	Public and non-public rows showing two ordered files	Comm File1 File2
Wc	The number of characters, words, and lines of a statistic file	WC filename
nl	Add a line number to a file	NL file1 >file2

Safe operation

command name	function Description	Examples of Use
passwd	Modify User Password	passwd
chmod	Change permissions for a file or directory	chmod ug+x filename
Umask	Define a permission mask to create a file	Umask 027
Chown	Change the owner of a file or directory	Chown newowner filename
Chgrp	Change the owning group of a file or directory	CHGRP staff filename
Xlock	To lock the terminal	Xlock-remote

Programming operations

command name	function Description	Examples of Use
Make	Maintaining the latest version of an executable program	Make
Touch	Update file access and modification times	Touch-m 05202400 filename
Dbx	Command line interface Debugging Tools	DBX a.out
Xde	Graphical user interface Debugging Tools	Xde a.out

Process actions

command name	function Description	Examples of Use
Ps	Show the current status of the process	PS u
Kill	Terminating a process	Kill-9 30142
Nice	Change the priority of the pending command	Nice cc-c *.c
Renice	Change the priority of a running process	Renice +20 32768

Time operation

command name	function Description	Examples of Use
Date	Displays the current date and time of the system	Date
Cal	Show Calendar	Cal 8 1996
Time	Execution time of the statistical program	Time A.out

Network and communication operations

command name	function Description	Examples of Use
Telnet	Telnet	Telnet hpc.sp.net.edu.cn
Rlogin	Telnet	Rlogin hostname-l username
Ts.	Execute the specified command on the remote host	RSH f01n03 Date
Ftp	Transferring files between a local host and a remote host	FTP ftp.sp.net.edu.cn
Rcp	Copying files between a local host and a remote host	rcp file1 host1:file2
Ping	Send a response request to a network host	Ping hpc.sp.net.edu.cn
Mail	Read and send e-mail	Mail
Write	Send a message to another user	Write username PTS/1
Mesg	Allow or deny receiving of messages	MESG N

Korn shell command

command name	function Description	Examples of Use
History	List several recently executed commands and numbers	History
R	Repeatedly executes a command that has been recently executed	R-2
Alias	To define an alias for a command	Alias Del=rm-i
Unalias	To cancel the definition of an alias	Unalias del

Other commands

command name	function Description	Examples of Use
Uname	Displays information about the operating system	Uname-a
Clear	Clear screen or window contents	Clear
Env	Show all currently set environment variables	Env
W.H.O.	List all users who are currently logged on	W.H.O.
WhoAmI	Displays the user name that is currently in action	WhoAmI
Tty	Displays the name of the terminal or pseudo terminal	Tty
Stty	Display or reset control key definitions	Stty-a
Du	Querying disk usage	Du-k SubDir
Df	Displays the total and free space of the file system	Df/tmp
W	Displays the total information for the current system activity	W

MAC Terminal Operations Command