Shell Programming and Scripting

Hello,
I have to build a temp. passwd-file without looked passwd entries in the /etc/passwd.

The looked passwd fields have an "*" in the passwd-filed (2nd field).

I think, it's possible to solve this problem with a small awk, but I don't know how ???

Normal users lines should be still in the new file, all lines with the following example "*" in the second field should be filtered, like:

otto:***LOCKED***:....
Mueller:*:....
Klaus:*TTT*:

What is the syntax (in awk) ?


Thx,
Martin

The easy way would be:

Code:

 grep -v \*\*\* /etc/passwd > temp.passwd

The awk way would be:

Code:

 awk '! /\*\*\*/' /etc/passwd > temp.passwd

I assume this is what you are looking for:

Code:

-bash-2.05b$ cat t
otto:***LOCKED***:....
Mueller:*:....
Klaus:*TTT*:
-bash-2.05b$ awk '! /\*\*\*/' t
Mueller:*:....
Klaus:*TTT*:

Depending on what you want.

To list lines where the second field is "*"...
awk -F: '$2 == "*"' file1

To list lines where the second field contains "*"...
awk -F: '$2 ~ "*"' file1

To list lines where the second field is not "*"...
awk -F: '$2 != "*"' file1

To list lines where the second field does not contain "*"...
awk -F: '$2 !~ "*"' file1

Sorry,
maybe my wish was not so clear.

I want to see in the new file all entries without the lines which contain characters like "*", "***LOCKED***", *XX*", ... in the second field.

I know, how to create to filter for specially (f.e.) "***LOCKED***", but what will be the syntax to filter different combinations with "*" in the second field (the filter should only check the entrie in the second field (ANYTHING:CHECK-THIS:ANYTHING:ANYTHING:.......)

Input:
otto:***LOCKED***:....
Sven:7hfd7ihd7fd:....
Mueller:*:....
Tanja:ukjs7i437jd:....
Klaus:*TTT*:

Output:
Sven:7hfd7ihd7fd:....
Tanja:ukjs7i437jd:....

Regards,
Martin

Is this what u are looking for ????

$ cat file1
otto:***LOCKED***:....
Sven:7hfd7ihd7fd:....
Mueller:*:....
Tanja:ukjs7i437jd:....
Klaus:*TTT*:
$ grep -v "*" file1
Sven:7hfd7ihd7fd:....
Tanja:ukjs7i437jd:....
$

No,
the filter should only "see" * in the second field,
your grep find every * everywhere in the line !

I know "grep -v" etc., but not shurte how the syntax is for awk -??? -NF=2 [?*?] or so ?????

Example:
Input:
otto:***LOCKED***:Comment 123:
Sven:7hfd7ihd7fd:Comment ***! :
Mueller:*:....:No Comment
Tanja:ukjs7i437jd:No Asterix here:
Klaus:*TTT*:*Comment*

Output:
Tanja:ukjs7i437jd:....
Sven:7hfd7ihd7fd:Comment ***! :

(also Sven, because the "*" is in NOT in the second field !!


Martin

Hmmm...I guess Ygor had a typo...

awk -F: '$2 !~ "\*"' file