How to specify multiple files as an argument to a Linux command?

Question

linux

For example, apply chmod +x to two files 1.sh and 2.sh at once.

Answer 1

chmod +x 1.sh 2.sh.
The command, of course, must support this syntax. Many commands from coreutils support.

Answer 2

As jcmvbkbc pointed out:
or like this:
chmod +x {1,2}.sh

Answer 3

Sometimes a command does not support multiple input files, then xargs is a great option
And a great replacement for xargs is gnu parallel www.gnu.org/software/parallel