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topics
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checkpoint.html,
chem_links.html,
compchem.html,
contents.html,
converge.html,
drug.html,
eq_state.html,
excited.html,
formul.html,
gaussian.html,
general_links.html,
grails.html,
intro.html,
magnet.html,
magnet3.gif,
models.html,
mopac.html,
motif.html,
motif1.gif,
motif2.gif,
nobel.html,
qmmm.html,
security1.html,
spin_cont.html,
states.html,
ts.html,
ts2.gif,
unix.html,
vi.html,
vib.html
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Most used UNIX commands
Most used UNIX commands
commands in bold
names of user supplied items in italics
- cat file
- -displays file without stopping
- cd directory
- -change to a subdirectory of the current
directory
- cd /path/directory
- -change to a new directory
- cd ..
- -move up one directory
- chmod +w dir
- -changes permissions of directory to allow
others to write into it.
- cp file location
- -Copies a file to a new location, where the
location can be a directory
or a new file name.
- date
- -shows the date and time
- df -k
- -shows the amount of room left on the
hard drives
- ftp machine
- -transfer files between current computer and named
machine.
Examples of named machine are asnc90 or
asnc90.asc.edu
or 129.66.16.2
User logs into the new machine then types
get file -to bring a file from the new machine or
put file -to send a file to the new machine or
dir -to show files on the new machine or
cd directory -to change to a new directory on the new machine.
- kill -9 pid
- -stops the job with the given pid number (get pid
number with ps command)
- lpq
- -shows which jobs are pending in the print queue
- lpr file
- -sends the file to the default printer
(usually a line printer)
- lprm job#
- -removes a job from the print queue (job number is
gotten from the lpq command)
- ls
- -Lists files in the current directory
- ls -a
- -Lists files including hidden files
- ls -l
- -Lists files along with size, date, ownership
and permissions
- mail user
- -sends mail to the specified user on that
computer.
End the message by typing control-D
- mail user@addr
- -sends mail to a user on another computer.
End the message by typing control-D
- man command
- -shows manual page on how to use that command
- mkdir directory
- -creates a new directory
- more file
- -displays a file controlled by the commands:
return -show next line
space -show next screen
b -show previous screen
q -quit
- mv file location
- -If location is a file name, this renames the
file.
-If location is a directory, this moves the
file there.
- passwd
- -changes users password (for machines not using
yellow pages)
otherwise use yppasswd
- program
- -typing the name of a program will run that
program
- program &
- -runs the program in the background, so the user
can continue to work while the program runs
- ps
- -shows processes belonging to the user for that
session by pid number
- ps -u user
- -shows all processes belonging to the specified user
by pid number
- pwd
- -shows current directory path
- rlogin machine
- -allows user to work in text mode on the named
machine.
Examples of named machine are asnc90 or
asnc90.asc.edu
or 129.66.16.2
- rm file
- -deletes the file
- rm *.ext
- -deletes all files with that extension (be
careful)
- rm *
- -deletes everything in that directory (be really
careful)
Don't do this in your home directory ever,
there are important hidden files!!
- rmdir directory
- -deletes the directory
- talk user
- -allows interactive typing of messages between to
logged in users.
Second user must also type
talk first_user
- telnet machine
- -Allows user to work in text mode on the named
machine.
Examples of named machine are asnc90
or asnc90.asc.edu
or 129.66.16.2
- time program
- -runs the program then tells the user how long the
program took to complete
- vi
- -the UNIX ASCII text editor (requires a complete
set of instructions of it's own)
- who
- -shows who is logged in
- who am i
- -shows your login ID
- yppasswd
- -changes users password (for machines using
yellow pages)
otherwise use passwd
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