UNIX for Dummies Questions & Answers

How can I do an and condition with fgrep.

I want to do:

ps -ef | fgrep -f searchvalues > tempmail.file
mailx -s "Email Subject" email@domain.com < tempmail.file

The search values file contains:
opt/bea.*java.*80
mysqld

What I want is to find things that contain:
mysqld OR
opt/bea AND java AND 80

This doesn't work. Do I have the syntax wrong?

I don't think there is a way to use an "AND" expression with fgrep (someone correct me if I'm wrong). You could do something like:

Code:

ps -ef | perl -n -e 'print if (/mysqld/ || (/opt\/bea/ && /java/ && /80/));'

Reading the expressions from a file is another matter, although that wouldn't be too hard.

Try:
ps -ef | grep -E "[m]ysqld|[o]pt/bea.*java.*80"

If you have a grep that doesn't understand -E, then replace "grep -E" with "egrep".

THANKS!! Both of these worked! I used egrep. Would you mind explaining why I need to use the []?

I would ask if you explain the perl but I think it's over my head!


I am not worthy!

[o] is a character class with just a single character. It will match o but it will not match the string "[o]".

This stops the grep command from finding itself. Take out those brackets and the results expand by one with the extra line being the grep process.

The results with the [] and without seem the exact same. I guess I don't get it. Either way, IT WORKS!!

THANKS A BUNCH!!



bash-2.03$ ps -ef | egrep "mysqld|opt/bea.*java.*80"
root 3930 1 0 09:53:58 ? 0:44 /opt/bea/jdk131/bin/../bin/sparc/
native_threads/java -server -Dui.root=80 -ms89
root 1015 1 0 11:44:00 ? 1:13 /opt/bea/jdk131/bin/../bin/sparc/
native_threads/java -hotspot -Drib.root=8000 -
root 1161 1 0 11:53:09 ? 0:00 /bin/sh /usr/local/bin/safe_mysql
d --datadir=/cache --pid-file=/cache/transserv
root 1180 1161 0 11:53:09 ? 0:16 /usr/local/libexec/mysqld --based
ir=/usr/local --datadir=/cache --user=root --p

bash-2.03$ ps -ef | egrep "[m]ysqld|[o]pt/bea.*java.*80"
root 3930 1 0 09:53:58 ? 0:44 /opt/bea/jdk131/bin/../bin/sparc/
native_threads/java -server -Dui.root=80 -ms89
root 1015 1 0 11:44:00 ? 1:13 /opt/bea/jdk131/bin/../bin/sparc/
native_threads/java -hotspot -Drib.root=8000 -
root 1161 1 0 11:53:09 ? 0:00 /bin/sh /usr/local/bin/safe_mysql
d --datadir=/cache --pid-file=/cache/transserv
root 1180 1161 0 11:53:09 ? 0:16 /usr/local/libexec/mysqld --based
ir=/usr/local --datadir=/cache --user=root --p

On HP-UX 11.00, it is inconsistent that grep will find itself. First it will, then run the same command again and it will not. So you are better off with the brackets. For example, in the following, you will see that the grep command lists itself:

ps -ef|grep telnetd
root 9076 1005 0 09:16:05 pts/tk 0:00 telnetd
apptest 15532 5588 1 11:04:35 pts/tf 0:00 grep telnetd
root 11008 1005 0 09:55:49 pts/tl 0:00 telnetd

But if you do:

ps -ef|grep [t]elnetd

then it would not.