Useful Unix Commands

Useful Unix Commands

cd

Go to your home directory

cd directory

Go to this directory

cd ..

move up one directory

cp [-i] file directory

Copy file to directory

cp –i file directory

Copy file to directory but check for existing file

man command

Get help for command

ls [-aFl]

List contents of a directory

a – all files (shows hidden files)

f – show file types ( * is an executable …)
l – show long file listing

mkdir directory

Make a new directory

rmdir directory

Remove a directory (must be empty)

mv oldfile newfile

Rename oldfile to newfile

lp file

Print file

rm [-ifr] file

Remove file

i – ask before deleting

f – delete files without inquiring
r – recursively traverse directories and their contents

Be careful typingrm –r *in your home directory

|

Pipe output of one program to the input of another

EX:>ls –alF | more
Will list the contents of the current directory one page at a time

grep [-i] searchpattern [file …]

Search files for test

-I-- ignore upper and lower case

Pwd

Print current working directory

find startdir directives Find searches a directory tree to find files that match criteria given
by directives.
EX: >find ~/ -name javaresources.htm
           Will attempt to find javaresources.htm starting in your
            home directory. Find can sometimes be quite slow.
         >find ~/ -name "*.html" -print
           Will search for all .html files in your home directory.

Useful Emacs Commands

Ctrl-X Ctrl-C	Quit emacs
Ctrl-H or backspace	Get help
Ctrl-N	Move cursor down one line
Ctrl-P	Move cursor up one line
Ctrl-A	Move cursor to beginning of current line
Ctrl-E	Move cursor to end of line
Escape-<	Move cursor to beginning of file
Escape->	Move cursor to end of file
Ctrl-X Ctrl-S	Save file
Ctrl-X Ctrl-F	Load new file for editing
Ctrl-X Ctrl-B	Show list of buffers (open files)
Ctrl-X filename Enter	Switch to filename
Ctrl-X K	Kill current file
Ctrl-S text Enter	Search forward for text
Ctrl-R text Enter	Search backwards for text
Ctrl-X 2	Split current window in two
Ctrl-X 1	Make the current window the only one
Ctrl-X 0	In Xemacs – remove all other frames
Ctrl-X 50	In Xemacs – remove current frame
Escape-% old Enter new Enter	Start searching forward and replace occurrence of old with new

cd	Go to your home directory
cd directory	Go to this directory
cd ..	move up one directory
cp [-i] file directory	Copy file to directory
cp –i file directory	Copy file to directory but check for existing file
man command	Get help for command
ls [-aFl]	List contents of a directory a – all files (shows hidden files) f – show file types ( * is an executable …) l – show long file listing
mkdir directory	Make a new directory
rmdir directory	Remove a directory (must be empty)
mv oldfile newfile	Rename oldfile to newfile
lp file	Print file
rm [-ifr] file	Remove file i – ask before deleting f – delete files without inquiring r – recursively traverse directories and their contents Be careful typingrm –r *in your home directory
\|	Pipe output of one program to the input of another EX:>ls –alF \| more Will list the contents of the current directory one page at a time
grep [-i] searchpattern [file …]	Search files for test -I-- ignore upper and lower case
Pwd	Print current working directory
find startdir directives	Find searches a directory tree to find files that match criteria given by directives. EX: >find ~/ -name javaresources.htm Will attempt to find javaresources.htm starting in your home directory. Find can sometimes be quite slow. >find ~/ -name "*.html" -print Will search for all .html files in your home directory.

cd

Useful Emacs Commands

Ctrl-X Ctrl-C