The first character on each line will indicate the file type. Next we have the last modification date and time. And finally, we have the name. Security chmod - Changes file modes. We can use the chmod command to modify those permissions listed above.
Execute access is required to run a file or access a directory.
Write access is needed to modify a file or directory. Note the chmod command operates on directories. Just remember that computers like numbers, not names. These are used for our convenience. Due to the details, UNIX supports the idea of links without much difficulty.