UNIX for Dummies Questions & Answers

while :
do
   your command
   sleep time_you_want
done

watch "ps -fu <user name> -o pid,comm,vsz | grep <process_name> | grep -v grep"

(01:40:26+deco@DeCoBuntu)
[~]$cat track
#!/bin/bash
if [[ -z $1 ]];then
echo "Usage: `basename $0` <process to watch> <delay between checks>"
echo "If Delay not specified, default is 5 seconds"
exit
fi

usage=`top -b1 -n1|grep -i $1|awk '{print $10}'`
while true
do 
echo -ne "$1 is using $usage percent of the total memory"
echo -ne "\r"
if [[ -n $2 ]];then
sleep $2
else
sleep 5
fi
usage=`top -b1 -n1|grep -i $1|awk '{print $10}'`
done
(01:42:10+deco@DeCoBuntu)
[~]$./track
Usage: track <process to watch> <delay between checks>
If Delay not specified, default is 5 seconds
(01:45:45+deco@DeCoBuntu)
[~]$./track firefox 2
firefox is using 16.5 percent of the total memory