Working with the Unix OS

Introduction to Unix
1,$s/^/>>/
1,$s/..$//
/[tT]he/
1,$s/[^a-zA-Z]//g
1,$s/ */ /g
1,$s/e.*e/+++/
1,$s/^.\{10\}//
1,$s/.\{5\}$//
1,$s/\(.*\) \(.*\)/\2 \1/
insert >> at beginning of each line
delete the last 2 chars from each line
look for the or The
delete all non alphabetic characters
change multiple blanks to single blanks
change from first e to last e on a line
delete first 10 chars from each line
delete last 5 chars from each line
switch to fields
! Regular expression characters
Notation Meaning Examples Matches
. any character x.. x followed by any two characters
^ begin of line ^wood line starting with wood
$ end of line x$ line ending with x
^$ line with no chars
* zero or more x* zero or more x's
occurrences of xx* one or more x's
.x* zero or more chars
[chars] any cha rs [tT] lower/uppercase t
[a-z] lowercase letter
[^chars] not chars [^0-9] any nonnumeric
[^a-zA-Z] any nonalphabetic
\{min,max\} at least min x\{1,5\} at least 1 and
and at most max
at most 5 x' s
occurrences of [0-9]\{3,9\} anywhere from 3-9
previous regular
successive digits
expression [0-9]\{3\} exactly 3 digits
[0-9]\{3,\} at least 3 digits
\(...\) store chars ^\(.\) 1st char on line
matched between store in register 1
parentheses in ^\(.\)\1 1st and 2nd char on
next register(1-9)
line if they're same
Advanced Vi
! Abbreviations
:ab fit Faculty of Information Technology
! Macros -set of macro chars { q, v, K^, ^A, ^ D, ^ E, ^X, ^Y }
:map ^A :!cat $HOME/.vihelp^M
! Search & Replace
:g/man /s//person /gc
:g/\(.*\) -\(.*\)/s//\2 -\1/gc
! Customise options for ".exrc' file
:set all
options abbreviation default
autoindent ai noai
ignorecase (search) ic noic
number nu nonu
redraw
noredraw
showmatch ) } sm nosm
wrapscan ws ws
wrapmargin wm wm=0
The UNIX Operating System
! Advantages
10