When you try to run some commands in console , jailshell enabled user accounts on cPanel server give this error sometimes.
-jailshell: fork: Resource temporarily unavailable
This is a bug in cPanel’s jailshell. Commands such as ls, cat etc returns this error. To correct this error:
a)Login to WHM
b)Suspend the account which has this issue
c)Unsuspend the account with [...]