grep- grep is used in putty for pattern matching.
The grep command is used to search text or searches the given file for lines containing a match to the given strings or words. By default, grep displays the matching lines.
$ cat
example.txt
UNIX operating system
UNIX and Linux operating system
Linux operation system
UNIX operating system
UNIX and Linux operating system
Linux operation system
Now we want to search all lines in file example.txt which contains word UNIX but same time doesn't contain world Linux.
$ grep UNIX example.txt
UNIX operating system
UNIX and Linux operating system
UNIX operating system
UNIX and Linux operating system
Now to exclude all lines which contains Linux we will apply another grep command in this output with option -v to exclude matching word as shown in below grep command :
$ grep UNIX example.txt | grep
-v Linux
UNIX operating system
UNIX operating system
Read more: http://javarevisited.blogspot.com/2011/06/10-examples-of-grep-command-in-unix-and.html#ixzz2fnzlK6By
AWK is used for processing the rows and columns in a file. Awk has built in string function and associative arrays. It supports most of the operators, conditional blocks and loops available in C language.
How it works
oretail@abcd-xyz004|OID: ls -l
field1 field2 field3 field4 field5 filed6 field7 field8 filed9
-rw-rw-r-- 1 oretail orappadm 4 May 17 2012 1.abc
drwxrwxr-x 3 oretail orappadm 256 Jun 29 2012 14159691
-rw-rw-r-- 1 oretail orappadm 4 May 17 2012 2.abc
-rw-rw-r-- 1 oretail orappadm 8 May 17 2012 3.abc
And among the 9 fields if we want to extract the field only then use the below command in unix box.
oretail@abcd-xyz|OID: awk '{print $1}' input_file
awk: 0602-533 Cannot find or open file input_file.
The source line number is 1.
Same for column 2 ----8.
Now what I am doing in my project
After create the user changes in the Appoworx tool. I need to verify whether the count is same as per the sheet.
for that I need to connect to piand001 and login with my credentials and password.
$ sudo su - appworx again ask for the password please provide the same. and all my user changes information present in the u2/appworx/out
then ls -l | tail - (no of user changes done for the day )
Now use the below command to sortout the logfiles.
$ grep -i user_name `ls -l o.RETAIL_USER_MAINT.*|grep "Sep 23"|awk '{print $9}'`|awk '{print $2}'
Meaning: In ls -l field number 9 is file name.So it fill get file name and grep for user_name in all the files
of the date and the resulting output will be
o.RETAIL_USER_MAINT.6105052.00.log:export user_name="abendrok"
in this field number 2 is user_name="abendrok" it will print that. Space is used as separator.
Thanks & Have Fun...
