That's a useless use of backticks and useless use of cat, not just inefficient but potentially harmful -- if the file is too large it may silently return less data than is really in the file.
This construct has none of those limits:
Since you have -m 1, you have GNU grep, which supports -F and -f, so a loop isn't actually necessary:
If targets.txt contains fixed strings and not regexes, add -F before -f.
---------- Post updated at 02:30 PM ---------- Previous update was at 02:29 PM ----------
...and if all you care about is the filename and not what precisely is matching, -l will work instead of -m 1.
These 2 Users Gave Thanks to Corona688 For This Post:
hi,
i'm having problem like this.
i wish to grep some keyword from certain files in one directory.
let's say i have a lot of files in my directory with the name of file.1 file.2 file.3 ...... file.500
i only wish to grep the keyword from file.20, file.21, file.23 .... file.50
i tried... (5 Replies)
hey.....
i do have text where the contents are like as follows,
FILE_TYPE_NUM_01=FILE_TYPE=01|FILE_DESC=Periodic|FILE_SCHDL_TYPE=Daily|FILE_SCHDL=|FILE_SCHDL_TIME=9:00am|RESULTS=B
FILE_TYPE_NUM_02=FILE_TYPE=02|FILE_DESC=NCTO|FILE_SCHDL_TYPE=Daily|FILE_SCHDL=|FILE_SCHDL_TIME=9:00am|RESULTS=M... (2 Replies)
Here is the sample of my file address.txt
Address 1
1234 Drive way
New Orleans, LA
Zipcode :- 12345
Address 2
4567 Spring way
Chicago, IL
Zipcode :- 67890
I would like to grep for an Address title (Ex :- Address 2) , then get its zipcode and echo both in a single line. Ex :- ... (3 Replies)
Hi
This time I'm trying to grep for an exact match
e.g
cat.dog.horse.cow.bird.pig
horse.dog.pig
pig.cat.horse.dog
horse
dog
dog
pig.dog
pig.dog.bird
how do I grep for dog only so that a wc -l would result 2 in above case.
Thanks in advance
---------- Post updated at 06:33 AM... (4 Replies)
root@localhost# echo 'server $serviceName -connectorType $connectorType -ipAddress $ipAddress -port $port -domain $domain' | cut -d "-" -f 1
O/P= server $serviceName
when i grep the o/p -v nothing is displayed
now how to output the all data by excluding the O/P (server $serviceName) from the... (5 Replies)
Hello everyone!I have a problem with grep function in unix.I have two files.One like this one:File1(Code)>100_10_50 >100_10_56>10_45_345and the other one like this:File2(Code more... (1 Reply)
Hello!
I have 2 files named tacs.tmp and tacDB.txt
tacs.tmp looks like this
0
10235647
102700
106800
107200
1105700
tacDB.txt looks like this
100100,Mitsubishi,G410,Handheld,,0,0,0
100200,Siemens,A53,Handheld,,0,0,0
100300,Sony Ericsson,TBD (AAB-1880030-BV),Handheld,,0,0,0... (2 Replies)
Hi There,
How do i finding files with match and without match
Normally,
I will use
grep -l 'Hello'
grep -L 'Hello World'
How do we combined (2 Replies)
Hi all,
Im trying to use grep to match a exact mask where some characters are known and some are not. for example:
j***n@email.com
in this case the length is known and the position of the unknown characters are know (and will be )
any idea how I can do this? the file list is not just... (3 Replies)
Discussion started by: flamer
3 Replies
LEARN ABOUT OPENDARWIN
zgrep
ZGREP(1) General Commands Manual ZGREP(1)NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep is used to invoke the grep on compress'ed or gzip'ed files. All options specified are passed directly to grep. If no file is speci-
fied, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and
fed to grep.
If zgrep is invoked as zegrep or zfgrep then egrep or fgrep is used instead of grep. If the GREP environment variable is set, zgrep uses
it as the grep program to be invoked. For example:
for sh: GREP=fgrep zgrep string files
for csh: (setenv GREP fgrep; zgrep string files)
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO grep(1), egrep(1), fgrep(1), zdiff(1), zmore(1), znew(1), zforce(1), gzip(1), gzexe(1)ZGREP(1)