I have a quick question. I just wanted to know if it was valid format (using bash shell scripting) to have a counter for a loop in a file name. I am thinking something along the lines of:
for((i=1; i <=12; i++))
do
STUFF
make a file(i).txt
-
Look at thisdinox0r– dinox0r2012-06-22 18:34:03 +00:00Commented Jun 22, 2012 at 18:34
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2 Answers
Here's a quick demonstration. The touch command updates the last-modified time on the file, or creates it if it doesn't exist.
for ((i=1; i<=12; i++)); do
filename="file$i.txt"
touch "$filename"
done
You may want to add leading zeroes to the cases where $i is only one digit:
for ((i=1; i<=12; i++)); do
filename="$(printf "file%02d.txt" "$i")"
touch "$filename"
done
This will result in file01.txt, file02.txt, and so on, instead of file1.txt, file2.txt.
1 Comment
jordanm
Good explanation. I would also add how ">" can be used to create files and truncate them if they already exist.
If you only want to make a bunch of files and don't need the loop for anything else, you can skip the loop altogether:
touch file{1..12}.txt
will make them all in one command.
If you have Bash 4, you can get leading zeros like this:
touch file{01..12}.txt
answered Jun 22, 2012 at 22:31
Dennis Williamson
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