How do I change a user password in Ubuntu Linux?

last updated in Categories , ,

We recently switched from Windows server operating system to Ubuntu Linux operating system at work. I am a developer by profession and do not know much about Linux. I need to change the sftp/ssh user account password on Ubuntu. How do I change a user password in Ubuntu Linux?

Sudo is Not Prompting For a Password When Re-executed Second Time

last updated in Categories , , , , , , , , , , ,

I use sudo to provide permissions and command execution rights to other users under UNIX and Linux operating systems. However, I noticed something strange about sudo. When executing sudo, it will prompt for the user’s password the first time, but sudo no longer requires a password anymore when re-executing it. Why? Is this is a security risk?