Thu, 18 Sep 2008
I found this amazing video on YouTube
This video shows Jeong-Hyun Lim who calls himself FunTwo performing Pachelbel's Canon. He calls his version "Canon Rock" - Simply amazing both in adaptation and performance.
Posted At: 21:43 | Posted In: /Miscallaneous | permanent link to this entry
Mon, 11 Aug 2008
Script to kill processes older than x days
On a linux farm sometimes there would be a need to kill processes that have been running for extended periods of time and notify the users before doing it. I had such a requirement and had to scour the internet for a lot of long hours to find a proper script to get this job done but couldn't find one. This script was written with ideas various sources and has been tested in an RHEL environment.
#!/bin/bash
# This is a script to identify user processes that have been running
# longer than a pre set number of days.
# **** BEGIN CONFIGURABLE PARAMETERS ****
# WARNING!! The following values should NOT be NULL.
# The script will not work with NULL values.
# Path to the logfile
LOG=/var/log/prockill
# List of groups to which users belong to
# The format should be 'group1| group2| group3| group4'
GROUP='everyone| utmp| 2000'
# Set the maximum age of a process before it is killed or email notification is sent
# If you want to notify users after 5 days and kill processes after 8 days then
# AGEKILL='1-| 2-| 3-| 4-| 5-| 6-| 7-| 8-'
# AGEMAIL='1-| 2-| 3-| 4-| 5-'
# AGE=3
AGEKILL='1-| 2-| 3-| 4-| 5-| 6-| 7-| 8-| 9-| 10-| 11-| 12-| 13-| 14-| 15-| 16-| 17-| 18-| 19-| 20-| 21-| 22-| 23-| 24-'
AGEEMAIL='1-| 2-| 3-| 4-| 5-| 6-| 7-| 8-| 9-| 10-| 11-| 12-| 13-| 14-| 15-| 16-| 17-| 18-| 19-| 20-'
AGE=3
# Email Address to send notifications to
MAIL=sheen@marfic.com
# Exceptions: processes that you dont want to kill
EXCP='ldap'
# **** END CONFIGURABLE PARAMETERS ****
# **** USER NOTIFICATION & PROCESS KILL ****
# Check if users have been notified
if [ -f /tmp/prockill.notified ]
then
# **** PROCESS KILL ****
if [ "`find /tmp/prockill.notified -mtime +$AGE`" != "" ] # Checking if the file was created x days ago
then # If file was created x days ago, its been x days since the users were notified.
# Demarc start of log
echo "**** Start List Processes Killed on `date` ****" >> $LOG
# Logging list of processes that match our conditions
ps -A -o user,pid,etime,group,args | egrep "$GROUP" | egrep -v "$EXCP" | grep "-" | egrep -v "$AGEKILL" >> $LOG
# Demarc start of log
echo "**** End List Processes Killed on `date` ****" >> $LOG
# Issuing SIGTERM to give processes a chance to exit gracefully
kill -15 `ps -A -o user,pid,etime,group,args | egrep "$GROUP" | egrep -v "$EXCP" | grep "-" | egrep -v "$AGEKILL" | cut -c10-15` > /dev/null
# Wait for 30 seconds to allow processes to terminate
echo "Waiting for processess to cleanly exit..."
sleep 30s
# Issuing SIGKILL to force all misbehaving processes to die.
kill -9 `ps -A -o user,pid,etime,group,args | egrep "$GROUP" | egrep -v "$EXCP" | grep "-" | egrep -v "$AGEKILL" | cut -c10-15` > /dev/null
rm -rf /tmp/prockill.notified # Clear the notified flag
exit 1
fi
else
# **** USER NOTIFICATION ****
# Get list of users and number of processes owned by them.
ps -A -o user,pid,etime,group | egrep "$GROUP" | egrep -v "$EXCP" | grep "-" | egrep -v "$AGEEMAIL" | cut -d' ' -f1 | uniq -c >> /tmp/prockill.eml
# Send email only if the filesize is greater than 0
if [ -s /tmp/prockill.eml ]
then
# Log notification.
echo "**** Start List Notified Processes on `date` ****" >> $LOG
echo "The following users have the indicated number of proceses that will be killed in 24 hours:"
cat /tmp/prockill.eml >> $LOG
echo "**** End List Notified Processes on `date` ****" >> $LOG
# Email Process list
mail -s "$HOSTNAME - Old Process Report" $MAIL < /tmp/prockill.eml
rm -rf /tmp/prockill.eml
touch /tmp/prockill.notified # Set notified flag
exit 1
else
# Log notification
echo "**** Start List Notified Processes on `date` ****" >> $LOG
echo "No old processes to kill!" >> $LOG
echo "**** End List Notified Processes on `date` ****" >> $LOG
exit 1
fi
fi