Best ways to Lock and Unlock a User Account in Linux | FOSS Linux
How to Fix Account Lockouts with Adaptive Policies | 2018-04-01 | Security Magazine
How to lock or unlock a root and normal user account using pam_tally2 and pam_faillock after certain number of failed login attempts in Linux - GoLinuxHub
Lock user symbol - Free security icons
Musk locks his Twitter account to personally test reported malfunction [Updated] | Ars Technica