`date +%h" "%d" "%h` will not be executed inside the single quotes. Use the -v option to pass variables into awk, and then the match () builtin function.
First goal: search for a line matching a certain expression and print all lines from then on to the end of the file. The following does this:
Code:
sed -n '/<regexp>/,$ p' /path/to/inputfile
If you, for instance, replace "<regexp>" with "foobar", then all lines, starting with the first occurrence of "foobar", to the end are being printed.
Second goal: get the correct regexp into this expression somehow. This is easy:
Code:
regexp="foobar"
sed -n '/'"$regexp"'/,$ p' /path/to/inputfile
Notice that first the single-quoted string is closed, then a double-quoted string is openend in which the variable is expanded, this is closed afterwards and then another single-quoted string is opened. This makes sure that, regardless of what is in "$regexp", the input string to sed remains as one string.
To fill the variable "$regexp" with the right content is left as an exercise to the interested reader. Note, that you may need escaping if the expression contains wildcard characters special to "sed", like "*", ".", etc..
One last thing: you should NOT USE BACKTICKS! Instead of
I'm completely lost here. The date command you used in your awk script:
Code:
date +%h" "%d" "%h
will give you something like:
Code:
Aug 14 Aug
which doesn't look anything at all like the:
Code:
Wed Aug 13 16:
you said you wanted to match. And, you never specified what that string represents in relation to the current time. If you're trying to print every line in your log file starting with the 1st line that matches the current hour of the current day, that would be something like:
or (since there are no slash characters in the date format you're trying to match which bakunin warned you about):
Code:
sed "/$(date +'^%a %h %d %H:')/,\$p" /iscp/user/monitor/ORA_errors
Note that if the day in the timestamps in your log file has a leading space instead of a leading 0 for the 1st nine days of a month, you'll need to change the %d in the date command format string to %e.
Last edited by Don Cragun; 08-14-2014 at 02:58 PM..
Reason: fix doubled single quote
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AABC
TTYP
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NHJK
KJHM
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AST3
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I tried with grep -A but it's not supported on my system.
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Hi
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Nov 10 session closed
Nov 10 Nov 9 08:14:27 EST5EDT 2010 on tty .
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Nov 10 afrtetryytr
Nov 10 session closed
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AA 1111 23 34
BB 45 56 78
CC 22 44
AA 2222 78 34 56
BB 22 56 67 68 23
CC 56 78
DD 33 55 77
AA 3333 46
BB 58 79
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09 0 XXX 0000001234 Z 1
09 0 XXX 0000001234 Z 1
09 0 XXX 0000001234 Z 1
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08-13-2014
How to dynamically fetch lines after a match?
