Working with the Unix OS

Introduction to Unix
Multiple commands can be entered on a single line, provided they are separated by a ";". To terminate a
command you can type ^c (interrupt).
! Input and Output
The default input comes from the terminal keyboard and output goes to the terminal screen.
! Redirection & Pipes
> output redirection, e.g. ls > filelist
" append output, e.g. cat filename " files
< input redirection, e.g. mail joe mary < letter
| pass output from one command to another,
e.g. sort filename | uniq | more who | wc-1
2> write standard errors to file, e.g. command> outfile 2> errorfile
& allows commands to be submitted for background processing by appending "&" to
the command line, e.g. spssx outfile 2> errorfile &
Note: C shell syntax is: (spssx < cmdfile > outfile) >& errorfile &
Logging In
! Logging In
login: enter your user name.
password: enter your password.
message of today
(hp) enter your terminal name
$ system prompt (Bourne, Korn)
! Logging Out
% logout from C-shell
$ exit from Korn shell
$ ^d short logout if allowed
Remember to logout!!!
! Changing Password
$ passwd
Changing password for user_name
Old password:
New password: e.g.: no01WAY.
Re-enter new password:
! Terminal Type
$ TERM=vtlOO
$ export TERM
! Halt screen output
^s stop scrolling
^q start scrolling
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