09-22-2009
Not sure about grep on aix. Check for a -P option. On RHEL 5, this puts grep into Perl mode, which would presumably allow you to keep your regexes intact.
Otherwise, it's very similar. Use quotes to shell-proof your patterns. Drop the slash delimiters.
Since it's a log, you can probs just grep on the keyword at the start of the line, i.e., grep "^Date: " or you could do grep "^Date: [0-9][0-9]:" etc.
To get positional vars out of a line you can use awk, I think like this:
echo $var | awk '{ print $1 $3 }'
Truth be told, though, if you can stick with perl, it's much easier--made for this kind of task.
---------- Post updated at 08:19 AM ---------- Previous update was at 08:17 AM ----------
also, if you're really a newb, you may not know about the man pages. Type 'man awk' or 'man grep' at the command-line. and while you're at it, type 'which perl' . If you get a path to perl, use it.
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LEARN ABOUT NETBSD
zfgrep
ZGREP(1) BSD General Commands Manual ZGREP(1)
NAME
zgrep, zegrep, zfgrep -- print lines matching a pattern in gzip-compressed files
SYNOPSIS
zgrep [grep-flags] [--] pattern [files ...]
zegrep [grep-flags] [--] pattern [file ...]
zfgrep [grep-flags] [--] pattern [file ...]
DESCRIPTION
zgrep runs grep(1) on files or stdin, if no files argument is given, after decompressing them with zcat(1).
The grep-flags and pattern arguments are passed on to grep(1). If an -e flag is found in the grep-flags, zgrep will not look for a pattern
argument.
zegrep calls egrep(1), while zfgrep calls fgrep(1).
EXIT STATUS
In case of missing arguments or missing pattern, 1 will be returned, otherwise 0.
SEE ALSO
egrep(1), fgrep(1), grep(1), gzip(1), zcat(1)
AUTHORS
Thomas Klausner <wiz@NetBSD.org>
BSD
December 28, 2003 BSD