linux - Run bash commands from txt file

Question

I have some commands in txt file and I need to execute all them line by line. How could I do it?

Answer 1

Just do bash file:

$ cat file 
date
echo '12*12' | bc

$ bash file
Mon Nov 26 15:34:00 GMT 2012
144

In case of aliases just run bash -i file

No need to worry about file extensions or execution rights.