How do I configruate sendmail so it's impossible to use my machine to send spam_emails? (I like just my machine an a macine x.y.z.v to be able to use mu machine as an smtp server. (byt I still want to be able to recive messages from other hosts)
Get the latest version of sendmail from http://www.sendmail.org -- if you go into the cf directory (to make the sendmail.cf configuration file) you will see you can set the option 'no promiscuous mode'
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SSH (Secure Shell) - Tips and Tricks
As you all know SSH(Secure Shell) is a network protocol, which we use to access/transfer files securely between two networked devices. SSH was actually designed as a replacement for insecure protocols that sen…
It’s 2016. Password authentication should be dead — or at least close to dying. But, unfortunately, it has not traversed Quagga stage yet. Using password authentication is like laundering hotel guest linens with a washboard — it’s Passé.
Learn how to find files with the shell using the find and locate commands.
Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
Learn how to navigate the file tree with the shell.
Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…