Linux Commands section is for learning the linux commands with examples.We will include basic to advance commands which is generally required for system administration task.
In this tutorial we will learn,how to allow only members of Wheel group to use su command.Means only members of wheel group can switch to another user by using su command.As we know that in Red Hat based operating system, wheel group is a special administrative group. To allow only Wheel group’s member to use … Read more
In this post we will know,how to create a system account below uid 500 on Red Hat based operating system.In Red Hat based operating system,the system account are below UID 500. The UID below 500 are reserved for system use ,it should not be assigned to other users. We can easily check the system user … Read more
In this tutorial we will learn, how to extract RPM package on Linux system. Extracting the rpm has one the important command and it will surely help you in System Administration. Many times I solved some problem which is caused by file corruption of particular package. Here is the story from my experience.One day,my colleague … Read more
In this tutorial we will learn,how to free pagecache, dentries and inodes from memory on linux systems. The linux system is quite capable to manage the memory itself.Sometimes we require to flush the cache from memory in linux system . On writing the file /proc/sys/vm/drop_caches cause the kernel to drop clean caches, dentries and inodes … Read more
In this post we will learn, how to create new directory in Linux system.Directory also called as folder(In Windows System). To create a new directory in Linux system we will use the command called mkdir. By using some options with mkdir command, we can do many things. To create a directory in Linux Use the … Read more
After installing the RHEL 6 and CentOS6 with minimal installation,I was configuring the rsyslog server. While configuring the rsyslog,without verifying I hit the semanage command.And result was with error – bash: semanage: command not found . The method is applicable to Red Hat based operating system like RHEL 6 and CentOS 6 What is semanage … Read more