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Information Technology Services

UNIX System Information


UCC UNIX(tm) Quick Reference Guide

Getting in and out

login
Log into the system
rlogin
Log into another system
passwd
Change your password
logout
Leave the system

File utilities

mv
Move (rename) files
cp
Copy files
rm
Remove files
cat
Display, concatenate files
more
Page through files
sort
Sort a file
diff
Find differences in files
cmp
Compare files
comm
Find common lines
uniq
Remove repeated lines
chmod
Change permissions of files
vi
Edit file
joe
A simple editor for files
emacs
A complex editor for files
jove
Another editor for files

Special Characters

!
History recall
\
Quote character
*
All match
?
One character match
[]
Match a set of characters
^
History substitution
%
Job referencing
&
Put job in background
'
Quote characters
-
Denotes an option

I/O Redirection

c > f
c into f
c < f
f into c
c < f > o
f into c output into o
c >> f
Add output of c to f
c >! f
Overwrite f from c output
c >& f
Put c output & errors into f
p | n
Pipe p into n
p |& n
Pipe p and errors into n
`c`
Quote output of c

Printing

lpr
Print a file
lpq
Check the printer
lprm
Remove print job

Common Utilities

date
Print date and time
script
Save a transcript of a job
clear
Clear the screen
mail or elm
Send/read e-mail
trn
Read USENET news
talk
Open a conversation
head
Display the first few lines of a file
tail
Display the last few lines of a file
finger
Find out who's on
groups
Find out what group you're in
quota -v
Check your quota
man
Display manual pages
grep
Find a string in a file
find
Find a file in a directory
du
Display disk usage
ftp
File transfer between machines
rlogin
Log into a UNIX system
telnet
Log into non-UNIX system
tn3270
Log into IBM systems
balance
Show your account balance
sysinfo
Read relevant system information
msgs
Read important system messages

Compilers and program utilities

cc
C compiler
gcc
GNU C compiler
f77
FORTRAN 77 compiler
pc
Pascal compiler
dbx
Debugger for cc, pc, f77

Processes

jobs
Show jobs
ps
Show process status
kill
Terminate a job
stop
Suspend a job
fg
Bring a job to foreground
bg
Resume job in background
exit
Leave a non-login shell session
Control-Z
One keypress to suspend a job
Control-C
One keypress to kill a job
Control-D
One keypress for end-of-file (EOF)

csh Shell Variables

term
What terminal you are using
path
Search path for commands
filec
Complete file names with ESC
ignoreeof
Can't use ^D to logout
noclobber
No overwrite w/ I/O redirection
prompt
The shell prompt

Files in your directory

.
The current directory
..
The parent directory
.cshrc
Paths, settings and aliases
.login
Reminders, tedious tasks
.logout
Commands done w/ logout
.mailrc
Default mail configuration
.forward
Address to forward to
.exrc
Startup for vi
.plan
Your 'plan' (for finger)
.project
Your 'project' (for finger)
.msgsrc
Record for msgs
.rhosts
The access file for your account
News
Directory for saved news articles
mbox or Mail
Your mail
core
A core dump
a.out
A compiled program

Using Directories

mkdir
Make a directory
ls
List directory contents
cd
Change directory
pwd
Print working directory
pushd
Push a directory on the stack
popd
Pop a directory off the stack
dirs
Print the directory stack

csh Shell Commands

alias
Assign/display aliases
unalias
Remove aliases
set
Declare/display shell variables
unset
Remove shell variables
setenv
Set environment variables
unsetenv
Remove environment variables
printenv
Print environment variables
rehash
Re-establish commands
source
Execute shell scripts
history
Print history of commands

Environment Variables

PRINTER
Default printer
MANPATH
Search path for man pages
PAGER
Default screen page reader
VISUAL
Default screen editor
EDITOR
Default editor
EXINIT
vi configurations
HOME
Your home directory
TERM
Terminal type
USER
Your User ID
SHELL
The shell you are using

Last revised November 9, 1995
Questions or corrections? problem@uhura.cc.rochester.edu
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