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how to search the exact word using grep in hpux

 
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senthil_kumar_1
Super Advisor

how to search the exact word using grep in hpux

Hi

Normally we use below command to find the line containing exact word in linux.

Ex: #grep -w ze4egi /etc/passwd.

But it is not working in hp-ux.

how to solve this?
18 REPLIES
Kenan Erdey
Honored Contributor

Re: how to search the exact word using grep in hpux

hi,

grep -w also works in hp-ux. what's the problem ?
Computers have lots of memory but no imagination
James R. Ferguson
Acclaimed Contributor

Re: how to search the exact word using grep in hpux

Hi:

What version of HP-UX? The '-w' switch to 'grep' works as "...the matching substring must either be at the beginning of the line, or preceded by a non-word constituent character. Similarly, it must be either at the end of the line or followed by a non-word constituent character. Word-constituent characters are letters, digits, and the underscore."

You can roll-your-own matches with 'grep' with your own regular expresssions and/or extended ones.

Regards!

...JRF...
senthil_kumar_1
Super Advisor

Re: how to search the exact word using grep in hpux

My HP unix version is 10.20, 11.00 and 11.11.


I am getting following error when running this command.


root@lgapps:/root > grep -w ze4egi /etc/passwd
grep: illegal option -- w
usage: grep [-E|-F] [-c|-l|-q] [-bhinsvx] -e pattern_list...
[-f pattern_file...] [file...]
usage: grep [-E|-F] [-c|-l|-q] [-bhinsvx] [-e pattern_list...]
-f pattern_file... [file...]
usage: grep [-E|-F] [-c|-l|-q] [-bhinsvx] pattern [file...]


Ganesan R
Honored Contributor

Re: how to search the exact word using grep in hpux

Hi,

What is the output you are getting?

Above command syntax suppose to work.

try this if that doesn't work.

#grep -i /etc/passwd
Best wishes,

Ganesh.
Sunny123_1
Esteemed Contributor

Re: how to search the exact word using grep in hpux

Hello

Try this


grep -i ze4egi /etc/passwd.

Regards
Sunny
Ganesan R
Honored Contributor

Re: how to search the exact word using grep in hpux

Hi,

-w switch is available with grep in 11.X. Not sure why you are getting illegal option message.

Can you check man grep to find if you have that option or not?
Best wishes,

Ganesh.
senthil_kumar_1
Super Advisor

Re: how to search the exact word using grep in hpux

Hi

If use the command

"grep -i ze4egi /etc/passwd"

If getting all the words in output like

wze4egi, ze4egiqwe,

But here i want to search exact word only.

Sunny123_1
Esteemed Contributor

Re: how to search the exact word using grep in hpux

Hi

Can you try this???

more /etc/passwd |grep "ze4egi"

Regards
Sunny
johnsonpk
Honored Contributor
Solution

Re: how to search the exact word using grep in hpux

Hi Senthil ,

This wont be the answer you asked for ,but if you are dealing with the /etc/password it may help u

if you want to extract by username
grep ^"usename:" /etc/passwd

if you are grepping any other field other than the login shell then

grep ":password:" /etc/passwd

grep ":1021:" /etc/passwd


thanks!!
Johnson
Shailendran V Naidu
Frequent Advisor

Re: how to search the exact word using grep in hpux

Try,

grep -c "ze4egi\>" /etc/passwd
James R. Ferguson
Acclaimed Contributor

Re: how to search the exact word using grep in hpux

Hi (again):

The '-w' switch isn't/wasn't available in 10.20 or 11.0.

Since you are searching '/etc/passwd' you might anchor your matches with ":" like:

# grep ":ze4egi:" /etc/passwd

Regards!

...JRF...
mobidyc
Trusted Contributor

Re: how to search the exact word using grep in hpux

Hello,

You need to use regexp.

you can try:
$ toto=daemon
$ egrep "[^[:alnum:]]$toto[^[:alnum:].]|^$toto[^[:alnum:].]|[^[:alnum:]]$toto$" /etc/passwd
daemon:*:1:5::/:/sbin/sh
$ toto=aemon
$ egrep "[^[:alnum:]]$toto[^[:alnum:].]|^$toto[^[:alnum:].]|[^[:alnum:]]$toto$" /etc/passwd
$

Regards,
Cedrick Gaillard
Best regards, Cedrick Gaillard
mobidyc
Trusted Contributor

Re: how to search the exact word using grep in hpux

Hello,

if your egrep does not understand [^[:alnum:]] you can replace it with :
[^a-zA-Z0-9]

Cheers,
Cedrick Gaillard
Best regards, Cedrick Gaillard
Suraj K Sankari
Honored Contributor

Re: how to search the exact word using grep in hpux

Hi,
See the below link there are so many grep examples are there

http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_04_02.html

Suraj
Viktor Balogh
Honored Contributor

Re: how to search the exact word using grep in hpux

it makes no sense grepping in /etc/passwd for whole words since all the lines are consisting of a single word
(instead of whitespace there is a : between the "words" - the only exception is the gecos field, it can contain whitespaces too...)

if you want to search for a particular user then either

# grep "^username:"

or use the special command pwget:

# pwget -n username

or

# awk -F: '{ if ( $1 == "username" ) print $0 }' /etc/passwd

this will print the whole line from /etc/passwd.

****
Unix operates with beer.
Viktor Balogh
Honored Contributor

Re: how to search the exact word using grep in hpux

sed works too:

# printf '\nthis is a sample\nfor \
> what can be done\nwith sed\n\n'

this is a sample
for what can be done
with sed

# printf '\nthis is a sample\nfor \
> what can be done\nwith sed\n\n' |
> sed -n '/\s*what\s*/p'
for what can be done
#
****
Unix operates with beer.
Viktor Balogh
Honored Contributor

Re: how to search the exact word using grep in hpux

corrected:

sed -n '/\swhat\s/p'

without the stars it match all the words that has whitespace(s) before and after
****
Unix operates with beer.
Bill Hassell
Honored Contributor

Re: how to search the exact word using grep in hpux

> grep: illegal option -- w

I suspect that your man pages do not mention -w either. The -w option was added to 11.00 or 11.11 as a 'funny' patch, that is, there didn't seem to be a grep patch but it was added with something else. grep is telling you that the option does not exist in the (old) version you are using.

As mentioned, the passwd file doesn't have words -- words being defined as text surrounded by white space. If you are searching the GECOS field (the user's name and related information), you need to isolate GECOS with something like awk and then search for words:

awk -F: '{print $5}' /etc/passwd | grep -w ze4egi

This will only work for a grep that has the -w option.


Bill Hassell, sysadmin