The current directory contains the following file: -rw-r—r— 1 root exec 24551 Apr 2 12:36 test.sh The file contains a valid shell script, but…

The execute bit in Linux is a permission bit that allows the user to run an executable file or enter a

directory. For regular files, such as scripts or binaries, the execute bit must be set for the user to run

them. For directories, the execute bit allows the user to access the files and subdirectories inside.

Therefore, to successfully execute the script test.sh, the execute bit should be set in the file’s

permissions. This can be done by using the chmod command with the +x option, for example: chmod

+x test.sh. The other options are either irrelevant or incorrect. The file’s extension does not affect its

executability, only its association with a program. The user executing the script does not need to be

in the exec group, as long as the user has the execute permission on the file. The SetUID bit is a

special permission bit that allows the user to run the file as the file’s owner, regardless of the user’s

identity. This is not necessary for executing the script, and may pose a security risk. The #!./test.sh

syntax is invalid, as the #! is used to specify the interpreter for the script, not the script

itself. Reference:

Linux Essentials Version 1.6 Objectives1, Topic 1.4: Command Line Basics, Subtopic: Basic Shell

Commands

Linux Essentials Version 1.6 Exam Preparation Guide2, Section 1.4: Command Line Basics, Page 16

Execute vs Read bit. How do directory permissions in Linux work?3