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01-03-2005
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Filter passwd
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 
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01-03-2005
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The easy way would be:
Code:
grep -v \*\*\* /etc/passwd > temp.passwd Code:
awk '! /\*\*\*/' /etc/passwd > temp.passwd Code:
-bash-2.05b$ cat t otto:***LOCKED***:.... Mueller:*:.... Klaus:*TTT*: -bash-2.05b$ awk '! /\*\*\*/' t Mueller:*:.... Klaus:*TTT*:
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01-03-2005
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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
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01-03-2005
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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 Last edited by Topsurfer; 01-04-2005 at 12:24 AM.
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01-04-2005
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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:.... $
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01-04-2005
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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
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