Fix "Permission denied" on script.sh

By Zennith Tech Lab • Published 2026-05-22 •
LinuxShell ScriptPermissionsBash

Stop getting permission denied errors when running local scripts. Learn how filesystem permissions protect Unix execution boundaries.

Direct Executable Permission

Grant execution permissions to your shell script using the command chmod +x script.sh to resolve bash permissions denied errors.

# Anatomy of Unix File Permissions

When creating scripts or files inside macOS or Linux, they obtain secure non-executable constraints by default to prevent rogue execution exploits. Attempting to run them triggers:

``bash # Bash console failure block bash: ./script.sh: Permission denied `

# Step 1: Add Execution Flag

Apply appropriate permission profiles to the target script file:

`bash # Elevate file privileges with user execution flags chmod +x script.sh `

Now execute the shell script successfully:

`bash ./script.sh `

# Step 2: Set Exact Permissions on Servers

If you are configuring system scripts for corporate servers, lock access vectors using numeric definitions:

`bash # Set write capabilities ONLY to the user owner, keeping read/execute public chmod 755 script.sh ``

# Related Sysadmin Tools

Optimize parameters:

  • Paste configuration segments within our Word & Character Counter to find formatting anomalies.