[sllug-members]: Script Question

[Remo Mattei]

you can use uniq and sort to make the files appear the same order..

Remo

Jason Clint wrote:
> I agree with roger the problem with diff is that the files may or may
> not be in the same order.  I worked trying to use diff for a bit and it
> requires a lot of trimming once you get the results.
> 
> Roger with this script you gave me it seems you define the files
> "$file1=somefile", "$file2=someotherfile".  Then you go in and cat,
> grep, sort and grep again all in one command.  First so I can understand
> how this is done can you explain what this command does "[[:space:]]+2\
> [[:space:]]" does that tell it to ignore the space?
> 
> Thanks.
> 
> Junior Systems Administrator
> Sento IT Jason Clint
> 
> (801) 431-9297
> (801) 661-4139
> 
> 
> -----Original Message-----
> From: Roger Smith [mailto:roger at itigger.com] 
> Sent: Monday, May 05, 2008 10:51 AM
> To: sllug-members at sllug.org
> Cc: Jason Clint
> Subject: Re: [sllug-members]: Script Question
> 
> On Monday 05 May 2008 10:44:37 am Jason Clint wrote:
>> I am trying to do a Linux script to compare 2 files in some way and
> only
>> return a certain result.
>>
>> File 1 = /etc/passwd 
>> File 2 = nonusers.txt
>>
>> File 2 has all the nonusers in it and I need to make sure my script
>> doesn't accidently pull out any of them.  This is a for a manual ldap
>> import and when I ran the script the first time I had a user named
> "ns"
>> so it pulled out "ns" and "nscd" which is a nonuser.  Anyway I was
>> trying to use a script to compare the 2 and only return a result that
>> didn't have "nologin" or even just return all results except the ones
>> that were in the status list nonusers.txt.  I'm kind of new at shell
>> scripting so any help would be greatly appreciated.
> 
> diff works, assuming the orders are the same. This is another way of
> going 
> about it.
> 
> # define files to compare
> File1 = /etc/passwd 
> File2 = nonusers.txt
> 
> # list all login entries : show unique entries and count how often they
> # appear : show entries that appear once
> cat $File1 $File2|grep -v nologin| sort |uniq -c|grep -E "[[:space:]]+1\
> [[:space:]]"
> 
> # list all login entries : show unique entries and count how often they
> # appear : only show entries that appear twice
> cat $File1 $File2|grep -v nologin| sort |uniq -c|grep -E "[[:space:]]+2\
> [[:space:]]"
> 
> -- Roger
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