id | chpasswd < file

id - print user identity

apropos - search the manual page names and descriptions


apt - Advanced Package Tool

APT is a management system for software packages.


Apt returns zero on normal operation, decimal 100 on error


Way How to change passwords for all users:

1)
create filetochangeps
username01:password01
username02:password02
username03:password03

2)
chpasswd < filetochangeps

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