Shell Programming and Scripting

if [ -x "$filename" ]; then # Note the space after the semicolon.
#+ ^^
echo "File $filename exists."; cp $filename $filename.bak
else # ^^
echo "File $filename not found."; touch $filename
fi; echo "File test complete."

$ ls -l foo.lis
ls: cannot access foo.lis: No such file or directory

jim@jim-HP ~
$ ls -l foo.lis
ls: cannot access foo.lis: No such file or directory

]jim@jim-HP ~
$ touch foo.lis

jim@jim-HP ~
$ ls -l foo.lis
-rw-r--r-- 1 jim None 0 Nov 24 06:03 foo.lis

cat -v myscript.sh

$ filename="/etc/hosts"
$ if [ -f "$filename" ];then echo "yes"; else echo "No";fi
yes

$ if [ -x "$filename" ];then echo "yes"; else echo "No";fi
No

$ ls -ltr /etc/hosts
-rw-r--r-- 1 root root 218 Nov 11 08:46 /etc/hosts