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[Solved] Touch 10% of the total files inside a folder

 
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Top Forums UNIX for Dummies Questions & Answers [Solved] Touch 10% of the total files inside a folder
# 8  
Old 04-24-2012
sorry. the line i gave replaces the ls | while loop. this for loop will give $file a full path, so you can touch the file no matter your working directory.

Code:
#!/bash/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

N=0

for file in "/home/user/Desktop/"*; do
    [ -f "$file" ] || continue # Skip things which aren't files

    [ `expr $N % 10` -eq 0 ] && touch "$file"

    N=`expr $N + 1` # Add 1 to N
done

This User Gave Thanks to neutronscott For This Post:
regraphix
# 9  
Old 04-24-2012
Many thanks guys! It works perfectly!

---------- Post updated at 05:10 PM ---------- Previous update was at 03:58 PM ----------

One last questions related to this topic! How do you make it scan for the 20% of the total files? I tried changin [ `expr $N % 10` -eq 0 ] to [ `expr $N % 20` -eq 0 ] but it touches less files now....

Thanks!

Quote:
Originally Posted by Corona688
What's your system? What's your shell?

Code:
N=0

ls /home/user/Desktop | while read FILE
do
        [ -f "$FILE" ] || continue # Skip things which aren't files

        # % is remainder of division.  0 % 10 is 0.  1 % 10 is 1.  9 % 10 is 9.  10 % 10 is 0.  And so on.
        # The remainder will be zero, every tenth file.
        [ `expr $N % 10` -eq 0 ] && touch "$FILE"

        N=`expr $N + 1` # Add 1 to N
done

# 10  
Old 04-24-2012
if you use 20 it will touch every 20th file and that's why number of new files are less.
for 20% use [ `expr $N % 5` -eq 0 ].
This User Gave Thanks to 47shailesh For This Post:
regraphix
 
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