New to scripting. How can I write code to create multiple files (a.txt, b.txt, ... , z.txt)?
Thanks.
1
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1Do you want to put anything in those files?Cascabel– Cascabel2010-11-10 03:41:59 +00:00Commented Nov 10, 2010 at 3:41
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8 Answers
One command to create 26 empty files:
touch {a..z}.txt
or 152:
touch {{a..z},{A..Z},{0..99}}.txt
A small loop to create 152 files with some contents:
for f in {a..z} {A..Z} {0..99}
do
echo hello > "$f.txt"
done
You can do numbered files with leading zeros:
for i in {0..100}
do
echo hello > "File$(printf "%03d" "$i").txt"
done
or, in Bash 4:
for i in {000..100}
do
echo hello > "File${i}.txt"
done
answered Nov 10, 2010 at 3:41
Dennis Williamson
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Comments
for i in {1..200}; do touch any_prefix_here${i}; done
where i is the count. So example files are employee1 employee2 etc... through to emplyee200
Comments
To create files with names a.txt and b.txt simple pass names to touch
touch a.txt b.txt
2 Comments
Stephane Gosselin
This ... is not arbitrary? ;)
vovan
Make sense to fix description :)
echo Hello > a.txt
echo World > b.txt
for i in a b c d e f g; do
echo $i > $i.txt
done
If you want more useful examples, ask a more useful question...
1 Comment
Cody Allan Taylor
Not everyone is a bash (or shell) expert. It is so easy to do everything with executables it can be easy to forget about built-in flow control tools.
You can create a file using $ cat > a.txt. If you need to have a file with specific content, type $ echo content > filename.
Comments
to have some content in file use dd
for i in {1..N};
do
dd if=/dev/urandom of=./path/file${i} bs=1M count=1;
done
Comments
Instead of using filenames a..z i prefer using numbers.
create a script like this (createNfiles.sh)
#!/bin/bash
if [ "$1" = "" ]; then
echo "Usage: $0 <number of files to create>"
exit 1
fi
now=`date '+%Y-%m-%d_%H%M%S'`
prefix="${now}_myFilePrefix"
echo "creating $1 files"
echo "now=$now"
for i in $(seq 1 $1); do file="${prefix}_${i}.log"; echo "creating $file"; touch $file; done
To execute it (create 100 files for example)
./createNfiles.sh 100
Comments
tl;dr:
echo CONTENT | tee PATH…
I had to address the content issue to create minimal valid Nix files, which can't be empty:
$ docker run --interactive --rm --tty --volume="${HOME}/dev/root:/etc/nixos" nixos/nix
[…:/# cd /etc/nixos
[…]:/etc/nixos# echo {} | tee common.nix hardware-configuration.nix host.nix
{}
[…]:/etc/nixos# cat common.nix
{}
[…]:/etc/nixos# cat hardware-configuration.nix
{}
[…]:/etc/nixos# cat host.nix
{}
