How do I see if my friends or coworkers are logged into the same Linux or BSD or UNIX (AIX, HP-UX, Apple OS X) server / workstation as I am from a command line?
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logins
How do I deny access to user account? Do I need to use /bin/false or /sbin/nologin to refuse a login?
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Q. I’ve Debian Linux server and whenever someone trying to ssh into this box, they get an error as follows and server closes the connection:
System bootup in progress -please wait
How do I fix this problem and allow ssh login?
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Q. How do I block access to root user over ssh session? A.. sshd (OpenSSH Daemon) is the daemon program for ssh. Server side ssh configuration is defined in /etc/ssh/sshd_config file. You need to use DenyUsers option to block access to root user. This option can be followed by a list of user name patterns, [...]
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