Junior executed chmod -x /bin/chmod and lost execute permissions. How to restore?

The command chmod -x /bin/chmod removed the execute permissions from the chmod binary itself, making it impossible to use this command to restore permissions. To restore execute permissions, you can:

1. Log in as a user with root privileges (for example, via sudo su or directly in recovery mode).
2. Run the command:

chmod +x /bin/chmod

If chmod is unavailable, you can use alternative methods:

• Use install (if available):

install -m 755 /bin/chmod /bin/chmod

• Use busybox chmod (if busybox is installed):

busybox chmod +x /bin/chmod

• Reboot into recovery mode or with a liveCD, mount the root partition, and fix the permissions.

The main goal is to gain access to the system with root privileges and use any available tool to restore execute permissions to the file.