UNIX COMMANDS

Is

list files and directories

ls -a

list all files and directories (command lists files that are normally hidden)

ls -l

list all files and information about those files (command lists more information about the files

mkdir **directory**

make a **directory**

cd **directory**

change to **named directory**

cd

change to home directory

cd ..

change to parent directory (Backs up/go back one directory

cd -

Returns you to whatever directory you were in last

pwd

prints the path of current (working) directory

cp **file1 file2**

copy **file1** and call it **file2**

mv **file1 file2**

move or rename **file1** to **file2**

rm **file1**

remove/delete **file1**

rmdir **directory**

remove a **directory**

clear

clears the screen

more **file1**

display **file1** a page at a time

cat **file1**

displays the entire contents of **file1** at once

grep **word** file1

* search for instances of **word** in file1
* stands for global search for regular expression and print out
* searches a file for a particular pattern of characters and displays \\n all lines that contain that pattern

diff file1 file2

Shows the line by line differences between file1 and file2

man command

display the manual for the given command

cd .

Stay in current directory

rmdir

remove the directory

rmdir directory1

remove directory1

apropos xxx

The command apropos can be used to display any command that references xxx.

diff

* used to display the differences in the files by comparing the files line by line
* If two files are identical, diff will show nothing.

gcc MyProgram.c

the command to compile a C program from a UNIX terminal.

./a.out

run a C program after compiling from a UNIX terminal.