Sponsored Content
Full Discussion: Another grep question
Top Forums UNIX for Dummies Questions & Answers Another grep question Post 302094358 by ghostdog74 on Friday 27th of October 2006 01:56:13 AM
Old 10-27-2006
Quote:
Originally Posted by kingdbag
Say I want to grep for a line with EXEC in it

grep EXEC blah.conf

thats cool but what if i want to grep for EXEC and if it finds a line with that in it to also grab the two lines above it?
Python alternative:
Sample input:
abc
def
ghi
EXEC
klm
nop
qrs
tuv
wxy


Code:
#!/usr/bin/python
data = open("input.txt").readlines()
for linenum , line in enumerate(data):
 	if 'EXEC' in line:
 		print ''.join(data[linenum - 2 : linenum])

output:
Code:
def
ghi

 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

grep question

what is the format for grep if I want to search from the current directory and through all its subdirectories?:) (3 Replies)
Discussion started by: pkappaz
3 Replies

2. UNIX for Dummies Questions & Answers

Grep Question

Hello Everybody, I have files; yyyymmdd.log which the data look like this; "Txid=9426043&MsgTxt=Thankyou&UserId=john&Password=jh2501" "Txid=9426150&MsgTxt=Thankyou&UserId=john&Password=jh2501" . . . "Txid=9426200&MsgTxt=Thankyou&UserId=john&Password=jh2501" Question 1: How to... (3 Replies)
Discussion started by: nazri76
3 Replies

3. Shell Programming and Scripting

grep question

hello people, All my servers have 4 mounts with this norme. For example, if my hostname is siroe. df -h | grep `hostname` /dev/dsk/c1t3d0s6 404G 399G 800M 100% /siroe3 /dev/dsk/c1t2d0s6 404G 399G 800M 100% /siroe2 /dev/md/dsk/d6 20G 812M 19G ... (3 Replies)
Discussion started by: melanie_pfefer
3 Replies

4. UNIX for Dummies Questions & Answers

grep question

Instead of using the following command #dmesg | grep -v sendmail | grep -v xntpd How can I use just one grep -v and give both arguments. Please suggest thanks (4 Replies)
Discussion started by: Tirmazi
4 Replies

5. Shell Programming and Scripting

grep question

Hello, Is there a way in grep to remember patterns? For eg: int a,b,c,d,a; If a variable is declared twice, like in the previous example, I should be able to print only those lines. Is there a way to print only the lines where the variable name occurs more than once, using grep... (1 Reply)
Discussion started by: prasanna1157
1 Replies

6. Shell Programming and Scripting

grep question please

i have files with "DOMAINSOLVER ACMS" with any number of spaces in between the two words on its own line and i can find it with the following: grep -c "DOMAINSOLVER* ACMS" $FILENAMEbut i need to exclude any lines matching: "$DOMAINSOLVER". i've tried a variety of quoting and escaping with no luck.... (4 Replies)
Discussion started by: crimso
4 Replies

7. Shell Programming and Scripting

Question about grep

can anyone tell me what the \/$ means? from grep \/$ (8 Replies)
Discussion started by: Nick1097
8 Replies

8. Shell Programming and Scripting

Question about grep

is there anyway i can ask grep to only get the first line? as in the top command line line 1 <-- just grep this line line 2 line 3 ---------- Post updated at 04:24 PM ---------- Previous update was at 04:19 PM ---------- nvm.. found out that i can do it with |head (12 Replies)
Discussion started by: Nick1097
12 Replies

9. UNIX for Dummies Questions & Answers

Question on grep

Hello all, I'm trying to grep the string "scott" from all files whose names are like srvr*.log and that were created "Nov 15"...I'm trying the following command but throws an error message...seems like the syntax is incorrect.. grep scott < ls -l srvr*.log|grep "Nov 15" Thanks for your... (9 Replies)
Discussion started by: luft
9 Replies

10. UNIX for Dummies Questions & Answers

Grep Question

My grep returns a row of data like this: 75=20130130;60=074338;61=985;511=55473883;452=115439;62=196;267=1; Is there a way for the grep to only return 60="something" and 511="something" ? Thanks in advance. (10 Replies)
Discussion started by: Carl2013
10 Replies
ZGREP(1)						    BSD General Commands Manual 						  ZGREP(1)

NAME
zgrep, zegrep, zfgrep -- print lines matching a pattern in gzip-compressed files SYNOPSIS
zgrep [grep-flags] [--] pattern [files ...] zegrep [grep-flags] [--] pattern [file ...] zfgrep [grep-flags] [--] pattern [file ...] DESCRIPTION
zgrep runs grep(1) on files or stdin, if no files argument is given, after decompressing them with zcat(1). The grep-flags and pattern arguments are passed on to grep(1). If an -e flag is found in the grep-flags, zgrep will not look for a pattern argument. zegrep calls egrep(1), while zfgrep calls fgrep(1). EXIT STATUS
In case of missing arguments or missing pattern, 1 will be returned, otherwise 0. SEE ALSO
egrep(1), fgrep(1), grep(1), gzip(1), zcat(1) AUTHORS
Thomas Klausner <wiz@NetBSD.org> BSD
December 28, 2003 BSD
All times are GMT -4. The time now is 01:01 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy