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awk '$1=="zone" { del=($2~/deletethisentry.com/) } !del' /var/named/zones.conf
If Field#1 is "zone" then set del according to field#2 containing "deletethisentry.com"; print if del is 0.

sed '/delete/,/^$/d' file

awk OK?
awk '/delete/, /^}/ {next} 1' file
zone "localhost" {
type master;
notify no;
file "db.myzone";
};


zone "keepthisentry.com" {
type master;
notify no;
file "db.myzone";
};

Use nawk or /usr/xpg4/bin/awk instead on Solaris or SunOS:
ifconfig lo0:5 inet6 | nawk '/inet6/{gsub(/inet6 |\/.*/,x)}1'

I don't know how large your log files will be, but greping or seding them will always read them from the start, which may become serious overhead.
If you just want to know if there's a DONE...

Yes, this is exactly what I'm suggesting. Here is working code, using sed as a better way to get the part of log file to test:

LAST_LINE_WITH_DONE=`grep -n DONE log | tail -n 1 | cut -d : -f 1`...

is it necessary to key off of the "DONE!" or could you somehow have the script check the status of the software under test? maybe running some sort of pre-existing status command or check the...

Are there no timestamps in this log file?

Or do as you suggested and tail the file. Pipe the stream into code that exits when it matches (grep -q). Worst case, tail will linger until the next time...

Would this work:

The first time, check if "DONE" already exists in the log file, using grep -n and tail -n 1 to find the last line number that "DONE" occurs on.

Then use the while loop,...

xmllint is a very handy tool to work with XML files. Here is a foolproof way to get the ip addresss no matter how your XML file is formatted, even it is packed in one line.


echo "
setns...

To get the IPv4 addresses into an array:

$ set -A myarray `sed -n '/ip="/s/.*ip="\(.*\)" loc.*/\1/p' infile`
$ echo ${myarray[@]}
192.168.1.101 192.168.1.117 192.168.1.154 192.168.1.159

As you may have found, XML parsing can be very complex.

Each case should be treated uniquely.

As for the data sample you provided, try the code below:
sed -n '/ip="/s/.*ip="\(.*\)" loc.*/\1/p'...

I think this should work for you:tail -f /var/log/logfile.log | perl -pe 's/ERROR/\e[41;1m$&\e[0m/g;s/SUCCESS/\e[42;1m$&\e[0m/g'

Well, signals go to all the processes, so the trap is in the tail's parent. You could open a subshell and set the trap just in there. It it is in a script, on most UNIX it is in a script-running...

Not when using a wildcard, I think. That is done inside the shell, you can't feed a literal "*.gz" into tar and expect it to understand. So either you need to be in the directory, or specify the...

Another variation:
FIRSTIPADDR=$(echo $VAR | awk -F'[ @]*' '{$0=$5}1')
echo $FIRSTIPADDR
or:
v=${VAR#*@}; FIRSTIPADDR=${v%% *}
echo $FIRSTIPADDR

$ echo $VAR | sed "s/.*@\([0-9]*\.[0-9]*\.[0-9]*\.[0-9]*\\).*/\1/"
10.10.10.10

try:
FIRSTIPADDR=`echo $VAR | awk '{ print substr($5,2) }'`
echo $FIRSTIPADDR

TryFIRSTIPADDR=$(echo $VAR | awk '{sub("@","",$5);print $5}')
echo $FIRSTIPADDR

or use it inline


if pkginfo TestPackage > /dev/null 2>&1
then
echo yeah
else
echo doh
fi

I would go for something like this:

pkginfo TestPackage > /dev/null 2>&1 # we do not want any output
if [ $? = 0 ]; then
echo yeah
else
echo doh
fi


And btw, this looks...

The problem is that underscore is a valid character in a variable name.
The shell is substituting $NAME_test not $NAME .
Surrounding the variable name with braces is the solution and many...

By using:

cp -- "${NAME}_test.tgz" "/tmp/${NAME}_test.tgz"

Or just:

cp -- "${NAME}_test.tgz" /tmp

perl -0pe 'if (!s/\n\n$/\n/){s/$/\n/}' /tmp/text.txt > /tmp/text.tmp; mv /tmp/text.tmp /tmp/text.txt

Assuming that the full script name is in $spath (e.g. /usr2/bin/script), then the following code in Kshell will yield the last part of the directory:


fullpath=${spath%/*} # full path of...