Set Date In Ubantu

1 . Set Timezone 2. sudo date --set="26 OCT 2011 19:51:00" 3 You can sync the Hw clock aswell : hwclock -w

Tomcat Remote Debug in linux

add folowing inside /etc/default/tomcat6

JAVA_OPTS="${JAVA_OPTS} -Xdebug -Xrunjdwp:transport=dt_socket,address=8787,server=y,suspend=n"

and restart . tomcat debug is now in port 8787

linux + convert file to Unix format

1. vi filename
2. Esc --> : set fileformat=unix
3.wq!

Find system profile in a linux machine - ubantu

$sudo lshw -html > mypc-name.html

Archive logs and Restart tomcat script .

#!/bin/bash
#author sanjeewa
#Important!! Script Must be run as root(u can ignore this if your tomcat does not need root
PATH=$PATH:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
export PATH
NOW=$(date +"%Y%m-%dT%H%M")
LOG_PATH=/home/abc/logs

log1=/var/log/tomcat6/catalina.out
log2=/var/log/tomcat6/application/error.log
log3=/var/log/tomcat6/application/application.log
netstatlog=/home/abc/logs/netstat.log

if [ "$(id -u)" != "0" ]; then
echo "This script must be run as root" 1>&2
exit 1
fi


echo `date` ":Tomcat restart script initiated!!"

cd $LOG_PATH
touch $netstatlog
echo "" > $netstatlog

if [ `ps -ef | egrep 'tomcat6' | egrep -v egrep | wc -l` -gt 0 ];
then
echo "tomcat found running"

netstat --tcp > $netstatlog
kill -3 `ps ax | grep tomcat6 | grep -v grep | awk '{print $1}'`
/etc/init.d/tomcat6 stop
/etc/init.d/tomcat6 stop

if [ `ps -ef | egrep 'tomcat6' | egrep -v egrep | wc -l` -gt 0 ];
then
kill -9 `ps ax | grep tomcat6 | grep -v grep | awk '{print $1}'`
fi
tar -cvf $NOW-abc.tomcat.tar $log1 $log2 $log3 $netstatlog
rm $log1
rm $log2
rm $log3

echo "Restarting tomcat !!!!!"
/etc/init.d/tomcat6 start

else
echo "Tomcat not found running"
echo "Restarting tomcat !!!!!"
/etc/init.d/tomcat6 start
fi

if [ `ps -ef | egrep 'tomcat6' | egrep -v egrep | wc -l` -eq 0 ];
then
/etc/init.d/tomcat6 start
fi

#you may use same script for search a exception in logs , if found restart
#[ `grep -R "ABC exception try restarting transaction" $log1 | egrep -v egrep | wc #-l` -gt 0 ];

Script to restart a remote machine, if certain processers found running.

Eg : Usage can be change to any command (eg : shutdon, sending mails, backup ..)

#!/bin/bash
# author SanjeewaF.
# Script will reastrt the remote server if any matching processors found.
# Process 1 : [abc]

if [ ! $1 ] ; then
echo "Please specify the remote IP";
exit
fi
echo "Checking for xyz Processers ========================== ";
ssh root@$1 "if [ `ps -ef | egrep '(\[\babc\b] )' | egrep -v egrep | wc -l` -gt 0 ]; then echo 'xyz processes were found!! System will Restart!!!!'; shutdown -r now; else echo 'xyz processes were Not found...............'; fi"

Shell script to travel through Mysql database tables

TABLES=$($MYSQL -u $MUSER -p$MPASS $MDB -e 'show tables' | $AWK '{ print $1}' | $GREP -v '^Tables' )

for t in $TABLES
do
echo "checking $t table from $MDB database..."
$MYSQL -u $MUSER -p$MPASS $MDB -e "check table $t"
done

I found it in Net .. might be useful ..