Question

i am learning shell scriptnig,
is there any way i can test the operation like checking file permission on a file..
like…
i know some of the way like. searching the file through find command using permission,
or in “ls…| grep ‘r–r–r’ smthg.. whatever permission u wan’t

I have some file how i check whether the file have the required permission or not..?\

Thanks in advance..

Answer 1

You can do something like:

Test for execution:

if [ -x "$file" ]; then
  #do_something
fi

Test for writing:

if [ -w "$file" ]; then
  #do_something
fi

Test for reading:

if [ -r "$file" ]; then
  #do_something
fi