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Secure Shell (SSH) public key authentication can be used by a client to access servers, if properly configured. These notes describe how to configure OpenSSH for public key authentication, how to enable a ssh-agent to allow for passphrase-free logins, and tips on debugging problems with SSH connections. Password free logins benefit remote access and automation, for example if administering many servers or accessing version control software over SSH.
The shell program /bin/bash (hereafter referred to as just "the shell") uses a collection of startup files to help create an environment. Each file has a specific use and may affect login and interactive environments differently. The files in the /etc directory generally provide global settings. If an equivalent file exists in your home directory it may override the global settings.
An interactive login shell is started after a successful login, using /bin/login, by reading the /etc/passwd fil... more>
An interactive login shell is started after a successful login, using /bin/login, by reading the /etc/passwd fil... more>
What do you do when "kill -9 [ID]" doesn't work? Absolute Beginner Talk
sudo useradd -d /home/testuser -m testuser
sudo passwd testuser
sudo passwd testuser
Linux Log files and usage
=> /var/log/messages : General log messages
=> /var/log/boot : System boot log
=> /var/log/debug : Debugging log messages
=> /var/log/auth.log : User login and authentication logs
=> /var/log/daemon.log : Running services such as squid, ntpd and others log message to this file
=> /var/log/dmesg : Linux kernel ring buffer log
=> /var/log/dpkg.log : All binary package log includes package installation and other information
=> /var/log/faillog : User failed login l... more>
=> /var/log/messages : General log messages
=> /var/log/boot : System boot log
=> /var/log/debug : Debugging log messages
=> /var/log/auth.log : User login and authentication logs
=> /var/log/daemon.log : Running services such as squid, ntpd and others log message to this file
=> /var/log/dmesg : Linux kernel ring buffer log
=> /var/log/dpkg.log : All binary package log includes package installation and other information
=> /var/log/faillog : User failed login l... more>
Crontab usage explanation
How do I start/stop Apache? Server Platforms
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