Help with shell script..

 
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Homework and Emergencies Homework & Coursework Questions Help with shell script..
# 8  
Old 04-11-2011
Perhaps you should start by looking at the du command.

It's not clear if morethan100k is the script name, or the file which shows the user's usage.
# 9  
Old 04-11-2011
ok in the terminal i can now get the total disk usage which is great... now tho need to create a script to execute from the terminal,
if [du -s -gt 100 ];
then echo "You have used more than 100k of disk space"
else echo "You have not used more than 100k of disk space"
fi

i tried doing this, but it doesnt seem to like the du command..

it is the script name

i now have this i am however having trouble comparing this output to a number
SIZE=`du -s`
echo $SIZE
test $SIZE -gt 100 && echo You have used more than 100k of disk space ||
echo You have not used more than 100k of disk space

Last edited by stefan1989; 04-11-2011 at 06:21 PM.. Reason: progress
# 10  
Old 04-12-2011
Quote:
Originally Posted by scottn
Please don't post one-line ready-made solutions in the homework forum.

Especially without good explanation.


The O/P is looking to be guided, not spoon-fed.
Oooops, sorry.

Here are the adding explaination for education pupose :
sum+=$7is like sum=sum+$7 since the 7th column of the find -ls statement display the size of the file, this will sum all the size of the found file (in bytes).
x=(sum>(100*1024))?1:0means if the sum exceed 100Kb (1Kbyte=1024 bytes) then set the variable x to 1 otherwise, set it to 0.(in awk 0 or empty means "false", if not empty and not 0 then it is evaluated to true... so 1 means "true")
Let me knows if you don't understand something in the code.
By the way, you can find usefull awk information here

---------- Post updated at 10:58 AM ---------- Previous update was at 10:55 AM ----------

@stephan1989,

Beware that using du -s, the displayed size will be in 512-bytes blocks !

see man du

So you should fix your

Code:
if [ du -s -gt 100 ]

statement about size calculation which is erroneous

... also don't forget the space after the "[" and before the "]"

Last edited by ctsgnb; 04-12-2011 at 06:05 AM..
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