Creating multiple files in unix/linux

If you want to create a set of files like filename1, filename2,.., you can use touch command like below

$ touch filename{1,2,3}

$ ls -ltr
$ filename1 filename2 filename3

You could also use ranges to create multiple files

$ touch filename{1..5}

$ ls -ltr
$ filename1 filename2 filename3 filename4 filename5

You could also use any string of characters like below

$ touch {a..c}{1..5}

$ ls
a1  a2  a3  a4  a5  b1  b2  b3  b4  b5  c1  c2  c3  c4  c5

And you can use below command to remove set of files

$ rm -f {a..c}{1..5}