Unix cheatsheet
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This document provides a cheat sheet for using the UNIX C Shell, covering topics like file manipulation, terminal setup, changing directories, listing and displaying files, copying, moving, removing files, printing files, finding files, comparing files, setting permissions, input/output redirection, C shell specific commands, job control, and special startup files.
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![UNIX C Shell Cheat Sheet
Setup
File Manipulation
Terminal Setup % stty erase ‘^?’ kill ‘^U’ intr ‘^C’
% set term=vt100
Setting Path Variable % set path=(directory ... directory)
Password Changing % passwd
Changing Default
Shell
% chsh
Help % man command
% man -k topic
Logging Out % logout
% <CTRL-D>
Listing Files % ls
Displaying Files % cat filename
% more filename
<space> next page
<return> next line
q quit
Copying Files % cp file1 file2
% cp file1 [file2] ... directory
% cp -r directory1 directory2
Use the -i option to prompt before overwriting files.
Moving Files % mv file1 file2
% mv file1 [file2] ... directory
% mv directory1 directory2
Use the -i option to prompt before overwriting files.
Removing Files % rm filename
% rm -r directory
Use the -i option to prompt before deleting files.
Printing Files % lpr filename
Directory Manipulation
Miscellaneous Commands
File Protection
Creating Directories % mkdir directory
Changing Directories % cd directory
% cd
Displaying Current
Directory
% pwd
Removing Directories % rmdir directory
Finding Files % find directory -name filename -print
Searching Files % grep string filename
Sorting Files % sort [-o output-file] filename
Comparing Files % diff filename1 filename2
% cmp filename1 filename2
User and Permission
Types
u file owner (u is short for user)
g group members
o all other users
r read permission
w write permission
x execute permission (for directories, allows users to use
the directory name in a pathname)
Displaying File
Protection
% ls -l filename
Changing File
Protection
% chmod [ugo][+-=][rwx] filename
% chmod nnn filename
numeric protection mode table
user group other
r 400 40 4
w 200 20 2
x 100 10 1
Default Protection % umask nnn
The umask value is subtracted from 666 for new files and
from 777 for new directories.](https://image.slidesharecdn.com/unix-cheatsheet-180103111105/85/Unix-cheatsheet-1-320.jpg)
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