secure ftp port: Making the secure ftp port is more important as you already know that vsftpd use default port 21 for making the connection with the server. So anybody (hacker) can try with the same port for connecting to server. But what if he/she doesn’t know the port for vsftpd for connection, yes off […]

You will be in the big trouble when dis-remember the root password. Only way to recover forgotten root password is to boot the server in single user mode to change the root password. Here is practical way of doing it. 1.    Reboot the server with following combination when the system asks for username & password […]

Connecting from one server to another server often asks the password before making connection. Also it asks the password while copying the data using scp command. This creates issue while automating the tasks using shell script. So to avoid the problem we need to configure the password less ssh login between the two servers/systems. So […]

user access control In UNIX system you always need to deal with security towards the system. File or directory level user access control is one of them. Mainly the purpose of the user access control list is to provide secure access to the flies and directory within the system. There are only two commands to […]

awk command examples : Awk is an text processing language which will typically use for extracting the required data from the flat file. You can define your requirements by using the conditions in the awk programming. This is widely used product in most of the UNIX like operating systems. To explain this I have given […]