[CentOS] Need help in writing a shell/bash script
Craig White
craig.white at ttiltd.com
Fri Dec 30 16:50:30 UTC 2011
looked like English to me...
On Dec 30, 2011, at 9:41 AM, m.roth at 5-cent.us wrote:
> Hey, supergiantpotato (and btw, this list is plain text, not unicode, and
> most of us don't read Japanese...),
>
> 夜神 岩男 wrote:
>> On 12/30/2011 09:00 PM, ankush grover wrote:
>>>
>>> I am trying to write a shell script which can merge the 2 columns into
>>> 3rd one on Centos 5. The file is very long around 31200 rows having
>>> around 1370 unique groups and around 12000 unique user-names.
>>> The 1st column is the groupname and then 2nd column is the user-name.
>>>
>>> 1st Column (Groupname) 2nd Column (username)
>>> admin ankush
>>> admin amit
>>> powerusers dinesh
>>> powerusers jitendra
> <snip>
>> This will do what you want. But please read the comments in the code.
> <snip>
>> #######BEGIN collator.sh
> <snip>
>> INFILE=${1:?"Input filename missing, please read script comments."}
>> OUTFILE=${2:?"Output filename missing, please read script comments."}
>>
>> awk '{print $1 ": "}' $INFILE | uniq > $OUTFILE
>> for GROUP in `cat $OUTFILE | cut -d ':' -f 1`
>> do for NAME in `cat $INFILE | grep $GROUP | awk '{print $2}'`
>> do sed -i "s/^$GROUP: /&$NAME,\ /" $OUTFILE
>> done
>> done
>> #######END collator.sh
>
> This is really complicated and fiddly. Look at the one awk script that was
> posted, which is *far* simpler, and uses awk the way it's intended to be
> used, not as a replacement for cut....
>
> mark
>
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
--
Craig White ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ craig.white at ttiltd.com
1.800.869.6908 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ www.ttiassessments.com
Need help communicating between generations at work to achieve your desired success? Let us help!
More information about the CentOS
mailing list