Bash
chmod Numbers Explained: 600, 644, 700, and 755
Decode numeric chmod permissions, choose common file and directory modes, verify the result, and avoid unsafe recursive changes.
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- Bash
How to Change File Ownership with chown in Bash
Use chown to change a file or directory owner and group, verify the result, and avoid unsafe recursive ownership changes.
- Bash
How to Find and Stop a Stuck Process Safely in Bash
Confirm a process and its PID, send SIGTERM first, verify the result, and reserve SIGKILL for a process that will not stop cleanly.
- Bash
SSH Key Permissions: When to Use chmod 600 or 700
Use chmod 600 for a private SSH key and 700 for its directory, then verify both permissions and ownership before reconnecting.
- Bash
How to List Running Processes in Bash with ps
Use ps in Bash to list running processes, read PID and owner columns, inspect one process, and choose when a live top view is more useful.
- Bash
How to Write a Safer Bash Backup Script with tar
Build a Bash backup script that validates its source, avoids silent overwrites, removes partial archives, and verifies the tar file.