Shell Programming and Scripting

ls -ld /home/*|while read a;do du -sk $a;done

du -skh /home/*

Take the following scenario when you are the system administrator to purchase a larger disk drive for your Linux server. You receive a phone call from an angry user, who claims that they are unable to save the files. To solve this problem quickly, you must check which user had taken most of the disk space and then make a decision what to do.  

Display the Device name, used space for each disk in kilo bytes and also the total available disk space in GB with meaningful headings sorted by Capacity. 

Display the usage in kilo bytes sorted in descending order (highest as the first line) for the first 10 users. (Test in Ubantu only as opentech does not allow you to access the other users. Create 3 or 4 users in Ubantu and 4 to 5 files in each user’s directory). 

Ask the user to enter the size of the used space in Kilobytes. List all users whose used space is  more than the size entered by the user as:
Login Name    User Full name		Used space

Login Name is the directory name itself. User Full name can be obtained from /etc/passwd command.

du -skh /home/* > /tmp/usr_usage.tmp
echo " Login name  User Full Name  Used Space" 
while read line 
do 
Usage=`echo $line | awk '{print $1}'`
User=`echo $line | awk '{print $2}'| cut -d\/ -f3`
rlname=`grep $User /etc/passwd | cut -d: -f5`
echo "$User     $rlname     $Usage"
done </tmp/usr_usage.tmp
rm /tmp/usr_usage.tmp