Useful unix commands



 
Command Description 
cat filename display the contents of the file called filename on the screen
cp filename newfilename copy the file called filename to a new file newfilename.
cp filename dir_name copy a file filename into directory dir_name.
more filename display the contents of the file called filename on the screen, pausing when the screen is full, waiting foe the user to type RETURN or ENTER to continue displaying
mv filename newfilename move the file called filename to a new file newfilename; wipes out old contents of , and delete the file filename
mv filename dir_name move a file filename into directory dir_name.
mv *.log dir_name move all log files into directory dir_name.
qpr -q printer filename print the file called filename on the printer called printer
Eg. qpr -q prsps plate.log
rm filename remove (delete) the file filename from the computer; the file is really truly gone!
cd dir_name change (or move) to the directory called dir_name
cd .. change (or move) back up one level in the directory tree
cd change (or move) back to your home directory, from whereever you currently located
ls display the names of all files in the current directory
ls *.log display all files ending in .log in the current directory
ls -l use long format for output from the ls command
mkdir dir_name create a directory called dir_name, which is located in the current directory
pwd display the complete name of your current directory including the whole pathname, that is, every directory on the path starting at the root directory of the Unix system down the tree branches to your current directory.
rmdir dir_name remove an entire directory from the computer; the directory must be empty for this command to actually do any deletion of the directory.
du display disk usage statistics
quota display your current disk quota
password change your login password
man command to display online documentation for command
script filename.scr make a record of a session for printing. The script ends when you type exit.