The JDK is a development tool for building applications, applets, and components using the Java programming language . It includes a useful tool for developing and testing programs written in the Java programming language and runs on the Java platform. You can go through this document to know more about new enhancement of Java JDK […]
One recommended way to manage virtual private server (VPS) or a dedicated linux server is not using the root account as the main access for SSH login. This is because usually the hackers will try to brute force your root password and potentially get access to your server. Instead of using the default root account, […]
I have a virtual private server (VPS) and plans to run a WordPress blog in it. A limited amount of RAM and swap size will be an issue because some software applications like MySQL, Apache, NGINX, PHP, HHVM and Varnish requires more memory to operate. From my past experience in Ubiquity Hosting and Linode, the […]
On this day, Nginx web server is reported to be a most popular and fastest in the internet if installed properly. But it should always be updated from time to time in order to maintain stability and high security so that is not exposed to hackers. For system administrators and web masters, it is routine […]
Red Hat Enterprise Linux 7 (RHEL 7) and CentOS 7 come with the new naming scheme for the network devices. These features change the name of network interfaces on a system in order to make the network interfaces fully predictable, fully automatic, easier to differentiate and that broken hardware can be replaced seamlessly. This affects […]
This post will show you the list of ldapsearch examples for 389 Directory. This ldapsearch examples assumes the following: a)This ldapsearch is search for uid in the directory. b)The 389 directory is configured to not support anonymous access, then the user “Directory Manager” and the password is required c)This ldapsearch command has been run on […]
This post assumed that we will change the System Timezone from the command line without using redhat-config-date. There are several files and directories that are used for time zones. In RHEL 6 and RHEL 6, there is one directory that very useful to select the appropriate time zone which is /usr/share/zoneinfo directory. Sometimes we forget […]
Question : How to mount CDROM/DVDROM media on linux CentOS server ? Solution : In certain situations, system administrators will need to mount cdrom containing the installer or data on linux CentOS or RHEL. Once cdrom mounted, they can access the data in the media discs directly. For reference, here is the easy way to […]
Tcpdump is a packet sniffer that able to capture traffic that passes through a machine. It operates on a packet level, meaning that it captures the actual packets that fly in and out of your computer. It can save the packets into a file. In this post, i will show how to install tcpdump on […]
Question : During the deployment of Samba and NFS services on one of the RHEL 6 server, I’m hit by this message when trying to start, stop and restart service portmap : [root@rhel6 ~]# service portmap start portmap: unrecognized service Answer : Portmap is replaced by rpcbind on some linux distributions such as Fedora […]
In this article, I will share about how to update and install RPM packages from the image CD-ROM/DVD-ROM in Red Hat Enterprise Linux 6 (RHEL 6). This step can also be used on CentOS 6 or older versions such as CentOS 5. It would be very useful if the server you have a slow internet […]
useradd is a low-level utility to create new users to the system. When used without the -D option, useradd command will create a new user account using the command line plus the default values ??of the system. Depending on the command line option, useradd command will update system files and also can create new user’s […]
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