In a bash script, using the conditional "or" in an "if" statement

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http://unix.stackexchange.com – This question is a sequel of sorts to my earlier question. The users on this site kindly helped me determine how to write a bash for loop that iterates over string values. For example, suppose that a loop control variable fname iterates over the strings "a.txt" "b.txt" "c.txt". I would like to echo "yes!" when fname has the value "a.txt" or "c.txt", and echo "no!" otherwise. I have tried the following bash shell script: #!/bin/bash for fname in "a.txt" "b.txt" "c.txt" do echo $fname if [ "$fname" = "a.txt" ] | [ "$fname" = "c.txt" ]; then echo "yes!" else echo "no!" fi done I obtai (HowTos)