In this tutorial, we will learn the basic use of head command in Linux / Unix system. Head command is widely used for System Administration. As the name suggest, it shows the head part means show output of the first part of files . Introduction Of Head Command Head command in Linux / Unix system,…
Today, while working on CentOS server, the requirement was to install mod_fcgid . In CentOS , the by-defualt yum repo link does not have mod_fcgid package. What is mod_fcgid mod_fcgid is a high performance alternative to mod_cgi or mod_cgid, which starts a sufficient number instances of the CGI program to handle concurrent requests, and these…
In this tutorial we will learn about whoami command in Linux / Unix system. We will also read about its use and advantage. Its best use is in shell like sh,ash and ksh where username is not seen in command prompt. Introduction Of whoami Command The whoami command print the user name associated with user…
In this post, you will learn about how to search keyword or string in Man Page like we do in vi/vim file editor. It basically searching keyword within same man page of the command. Question: How may I search a keyword in man page like we search in vi /vim editor ? Answer: To search…
In this tutorial we will learn, simple method to find the keyword in all available man pages in Linux / Unix system. First we have to be confirm that man command is installed. man page Abbreviation of man page is manual page. It is a software documentation in Unix like operating system. Generally in many…
When we work in terminal or command line, sometime we want to know in which current directory we are working. And sometimes we also want to know in which previous directory I worked.These requirement are simple but are very important for system administration. Information of working directory is also required in scripting. When system administrator…
In Linux and Unix Systems, cd command is one the basic,essential and frequently use command.Abbreviation of cd is “Change Directory” . For Linux/Unix System Administrator, it is important to know by how many ways cd command can be used. In this post, I have listed 6 examples which will help you in your daily system…
Learn how to configure or set motd on Linux Operating Systems. The motd abbreviation is “Message Of The Day”. The motd is widely used in Linux servers.
In this post we are explaining about type command with examples. In Linux system, type command is used for displaying information about command types. It displays if command is an alias,shell function, shell builtin, disk file, or shell reserved word. You can use type command with other command names also. With the help of type…
When we execute any command or script,it returns an exit status. The exit status is also called as return code or exit code. It is important to know the exit status of command which we execute. The method which we are going to describe become more helpful with script also. Exit status must be an…
Learn more about which command with examples to find the path of Linux command and executable files in Linux and Unix operating system.
In this tutorial we will learn about, how to use df command to check the mounted filesystem on linux. As a Linux System administrator, this command is basic and very important.The df command shows the usage of mounted filesystem.It is notable that the filesystems which are not mounted on system,we can not get its information…
The post is about to show account aging information.To get details of user account password expiration ,we use the command chage. With chage command use the option -l or –list. The chage program requires a shadow password file to be available.The absolute path of shadow file is /etc/shadow.It is notable that /etc/shadow file has password…
Today,in this post we will learn, How to show line numbers with less command in Linux.In our previous post we have described about how to show line number with cat command. Less command is similar to more command but it has more features.As the name suggest, it read less output rather than reading the entire…
In this tutorial we will know, how to test rpm package before installation .You may have seen while installing the rpm package file by using rpm -i command, some problem may occur. It can be issue with dependency,GPG signature or corrupt rpm package etc. As a Linux System Engineer,this command is very useful and should…