2) sort
3) more
4) cut
5) wc
6) uniq
1) grep: (Global Regular Expression Patern)
This command is used for searching a required patern in a file.
Syntax:
$ grep [- optopn] "search patern" Filename [redirection symbol newfilename]
Options:
-i Ignores case sensitiveness in searching patern
-n displays line numbers for those lines which gets matched and un matched with the patern
-c counts number of times a searching patern exists and does not exists
-v (verbose) Displays those lines that does not match with the patern
Example:
$ cat > paypal.txt
welcome to unix
paypal welcomes you
unix multi user os
WELCOME to the world of unix
$ grep "welcome" paypal.txt
$ grep -i "welcome" paypal.txt
$ grep -i -n "welcome" paypal.txt
$ grep -i -c "welcome" paypal.txt
$ grep -i -v "welcome" paypal.txt
$ grep -i -v -n "welcome" paypal.txt > funpal.txt
Sort : Used to arrange numbers/text in ascending/descending order.
* by default it arrages ascending order.
Syntax:
$ sort [-option] [redirection synbol ] filename [redirection synbol] [new filename]
options:
-r Arrage data in reverse or descending order
-n Arrage data in ascending or descending order by considering whole number.
* if n is not used then numbers gets arranged in order based on 1st digit.
Ex1:
$ sort > paypal.txt
6
2
9
1
5
3
$ cat paypal.txt Ascending order
$ sort -r paypal.txt > funpal.txt Descending order
$cat funpal.txt
Ex2:
$ sort >google.txt
176
2165
8
93
-----
------ [ctrl+d]
$cat google.txt It considered first digit
$sort -n google.txt > yahoo.txt It considered whole number.
more: This filter command used to display information from multiple files based n page wise.
It gives an identification of end of file for first file and begining of next file.
Syn:
$more [-option] file1,file2,file3, etc...
options:
-p clears the screen and displays next file in the list of files
*note:
Enterkey retrives next file based on %s
spacebar retrieves complete data from next file
Ex: $more - p paypal.txt funpal.txt
cut: Used to cut the required text from a file.It can cut the data on the columns and feilds.
Syntax:
$ cut [-option] filename [redirection symbol new filename]
-c To cut the data in columns
-f To cut the data in feilds that is that data which is separated by tab.
Ex1:
$ cat>paypal.txt
Hyderabad
Secunderabad
Andhra [ctrl+d]
$ cut -c1 paypal.txt [Enter]
H
S
A
$cut -c3 paypal.txt [Enter]
d
c
d
$cut -c1 -3 paypal.txt [Enter]
Hyd
Sec
And
Ex2:
$cat > funpal.txt [Enter]
India Delhi
Andhra Hyderabad
Peers Net
[ctrl+d]
$ cut -f1 funpal.txt [Enter]
India
Andhra
Peers
$ cut -f2 funpal.txt [Enter]
Delhi
Hyderabad
Net
wc: It will count number of lines,worlds,characters in a file.
Syntax:
$ wc [-option] filename
options:
-l count number of lines
-w count number of words
-c count number of characters
Ex:
$ wc -l paypal.txt
$ wc -w paypal.txt
$ wc -c paypal.txt
uniq: This filter is used to get the uniq or duplicate lines from a file.Data should be in order.
Syntax: $ unix [-option] filename
options:
-d Display duplicate lines
-u Display uniq lines
-c Counts number of times each word has occured in a file
Ex:
$ cat > city.txt
ameerpet
ameerpet
peers
bhel
hyderabad
ameerpet
peers
secunderabad [ctrl+d]
$ sort city.txt> city1.txt
$cat city1.txt Ascending order of data displaying
$ uniq -u city1.txt
$ uniq -d city1.txt
$ uniq -c city1.txt
