Linux Killing a Process using pid or process name

To get rid of a background job, use the kill command with the job number as an argument. For example, to kill job 2:

% kill %2

To get rid of only one process, use the kill command with the process ID as an argument. For example, to kill process 12030:

% kill 12030

If that doesn't kill it, use the -9 option:

% kill -9 12030

Here is a ksh script to kill processes by name.
Usage: kill processName

---------------- cut here ---------------------
#!/usr/bin/ksh

str="$1"

ps -ef  grep "$str"  {
while read aline;do
        cmd=`echo $aline  awk '{ print $9 }'`
        if [ [ $cmd = $0 ] ]; then
                continue
        fi

        cmd=`echo $aline  awk '{ print $8 " " $9 " " $10 }'`
        if [ [ $cmd = "grep" ] ]; then
                continue
        fi

        cmd2=`echo $cmd  grep "$str"`
        if [ [ $cmd2 = "" ] ]; then
                continue
        fi

        print "$aline"
        pid=`echo $aline  awk '{ print $2 }'`
        print "kill pid = $pid"
        kill -9 $pid
        done
}