how to grep all users's certain file

[packets]

Can someone lead me how to do this. I have a bunch of users having .qmail in their home directory. How can I grep or cat whats inside in each of the user's .qmail file? I'm thinking of a bash script with 'for' syntax. Here is the sample:

#!/bin/bash

users=`cat /etc/passwd | awk -F: '{print $1}'`

for id in $users
do
cd ~$id/ | cat .qmail
done

Now that I got all the list of users, didn't know how to cat/grep the .qmail file in each users. Please advise.


Thanks!

[radoulov]

cat $(IFS=$'\n';printf "%s/.qmail " $(cut -d: -f6 /etc/passwd)) 2>&-

[wje_lf]

Actually, packets was very, very close to the solution on his own. Just make one tiny adjustment:

 #!/bin/bash

users=`cat /etc/passwd | awk -F: '{print $1}'`

for id in $users
do
cd ~$id/
cat .qmail
done

[Kieren]

Why bother to cd into the directory?

#!/bin/bash

users=`cat /etc/passwd | awk -F: '{print $1}'`

for id in $users
do
cat ~$id/.qmail
done

[Franklin52]

And using cat is redundant, awk is sufficient:

#!/bin/bash

awk -F: '{print $1}' /etc/passwd |
while read id
do
  cat ~$id/.qmail
done

Regards

[wje_lf]

You don't have to cd to the directory. There are all sorts of ways to do what he wants to do. I'm guessing that part of his question was "what's wrong with this script?", and I wanted to give him the minumum necessary to fix it, so that he could tell what was wrong with it, and thus learn a bit more about shell scripting.

[wje_lf]

And using cat is redundant, awk is sufficient

Correct. But when he said

How can I grep or cat whats inside

I'm guessing he wasn't asking, "which tool should I use to examine the data?" I'm guessing that he was asking, "Given a particular tool, how do I access the data?" So my extremely simple fix to his script was what I figure was necessary to send him on his way as a happy camper.

[Franklin52]

Correct. But when he said

I'm guessing he wasn't asking, "which tool should I use to examine the data?" I'm guessing that he was asking, "Given a particular tool, how do I access the data?" So my extremely simple fix to his script was what I figure was necessary to send him on his way as a happy camper.

wje_lf,

It was just to show the OP the possibility with awk not to correct you.

Regards

[wje_lf]

Oh, I knew that. :)

It's just that the two of us read differently what he wants. Between the two of us, I'm sure if he doesn't have what he wants, he'll speak up.

Such is the magic of electrons and stuff.

[packets]

Sorry for not replying.

I tried all the script but all it says is:

cat: ~nelsonts/.qmail: No such file or directory

My home directory nelsonts has .qmail file with ./Maildir/ in it. The reason why I doing this is I want to get all the users and those users that are not active. I would know fast if I can check inside those .qmail files