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Full Discussion: Please explain this grep command
Top Forums UNIX for Dummies Questions & Answers Please explain this grep command Post 302797345 by bakunin on Monday 22nd of April 2013 12:00:25 PM
Old 04-22-2013
Quote:
Originally Posted by alister
Note that the 'server.log' in that grep command is almost certainly incorrect. The dot is behaving as a wildcard when what's most likely intended is a literal dot.
True. The other plausible explanation is that the writer of this intended to search a file named "server.log" for a string/regexp he just forgot to write. This would mean the statement is equally incorrect, but so for a different reason.

Code:
grep '<missing regexp>' -A 999999 server.log

In any way, your solution is preferable to this, albeit in case the intended purpose was like i said it would have to be modified slightly:

Code:
sed -n '/<missing regexp>/,$ { /Option=\[Yes]/p; }' server.log | wc -l

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
scj2012
 

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LEARN ABOUT OSF1

nislog

nislog(1M)						  System Administration Commands						nislog(1M)

NAME

       nislog - display the contents of the NIS+ transaction log

SYNOPSIS

       /usr/sbin/nislog [-h num | -t num]  [-v] [directory...]

DESCRIPTION

       nislog  displays  the  contents of the NIS+ server transaction log on the standard output. This command can be used to track changes in the
       namespace. The /var/nis/trans.log file contains the transaction log maintained by the NIS+ server. When updates occur, they are	logged	to
       this  file  and	then  propagated  to replicas as log transactions.  When the log is checkpointed, updates that have been propagated to the
       replicas are removed.

       The nislog command can only be run on an NIS+ server by superuser. It displays the log entries for that server only.

       If directory is not specified, the entire log is searched. Otherwise, only those logs entries that correspond to the specified  directories
       are displayed.

OPTIONS

       -h num	       Display num transactions from the ``head'' of the log. If the numeric parameter is  0, only the log header is displayed.

       -t num	       Display	num transactions from the ``tail'' of the log. If the numeric parameter is  0, only the log header is displayed.

       -v	       Verbose mode.

FILES

       /var/nis/trans.log      transaction log

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWnisu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       nis+(1), rpc.nisd(1M), nisfiles(4), attributes(5)

NOTES

       NIS+  might  not  be  supported in future releases of the SolarisTM Operating Environment. Tools to aid the migration from NIS+ to LDAP are
       available in the Solaris 9 operating environment. For more information, visit http://www.sun.com/directory/nisplus/transition.html.

SunOS 5.10							    12 Dec 2001 							nislog(1M)
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