|
Academic and Research Computing
QUICK STUDY #2
February 2003
Useful UNIX Commands
Type those commands shown in Bold type exactly as shown. Items which
appear in italic type should be replaced with the name of a specific
file, printer, etc.
Please note that you need not necessarily be on an RCS UNIX machine in order
to use these commands; you can also initiate a SecureCRT
session to an RCS host (for example, rcs-ibm.rpi.edu) from a PC. SecureCRT is pre-installed on all Rensselaer laptops.
If you
would like instructions for obtaining the SecureCRT license, click on the
Academic & Research Computing link under the ``Computing
Services"
section of the RPInfo homepage, then select the Software to
install,
and
SecureCRT
links.
Working with Files and Directories
| To do this: |
Enter this in a UNIX window: |
|---|
| Create a directory |
mkdir directoryname |
| Change directories |
cd directoryname |
| To change to your home directory |
cd |
| To change to parent directory |
cd .. |
| Print working (current) directory |
pwd |
| List access to a directory |
fs la |
| List files in a directory |
ls |
| List files including size, etc. |
ls -l |
| List all files (including hidden files) |
ls -a |
| Display contents of file on screen |
more filename |
| Copy one file to another |
cp origfilename
newfilename |
| Move (rename) a file |
mv filename1 filename2 |
| Create a file alias (symbolic link) |
ln -s
origfilename aliasfilename |
| Remove (delete) a file |
rm filename |
| Remove all files in a directory (be careful!!) |
rm * |
| Remove an empty directory |
rmdir directoryname |
| Remove a directory and all its files |
rm -r
directoryname |
| Edit a file |
emacs filename |
| |
vi filename |
| |
nedit filename |
| Search a file for pattern |
grep pattern filename |
| Append a second file to the first file |
cat
filename2 >> filename1 |
Printing
| To do this: |
Enter this in a UNIX window: |
|---|
| Print a file on the default printer |
lpr filename |
| Print a file and select printer |
lpr -Pprintername
filename |
| Check the print queue |
lpq or lpq -Pprintername |
| Cancel a print job |
lprm jobnumber
or lprm -Pprintername jobnumber |
| Check your printing allocation |
pagestatus |
Account-related Activities
| To do this: |
Enter this in a UNIX window: |
|---|
| Change your password |
passwd |
| Get help on a command or program |
man command |
| Check your disk quota |
fs lq |
| Increase your disk quota (extra charge) |
quota_request
-quota # (total # of MB wanted) |
| Reset your disk quota |
quota_request -reset |
Working with PC files
| To do this: |
Enter this in a UNIX window: |
|---|
| Copy file from RCS to the a:(floppy) drive |
mcopy filename a:filename |
| Copy file from the a:(floppy) drive to RCS |
mcopy a:filename filename |
| List files on the a:(floppy) drive |
mdir a: |
| Eject floppy disk from drive (if no button) |
meject |
For more information on UNIX commands and text editors,
see memo RPI.113,
Using UNIX:
The Rensselaer Computing System (RCS).
Published by Academic and Research Computing, RPI, Troy, NY 12180
Send comments to consult@rpi.edu.
|