In this tutorial,we will learn about how to install and configure transparent squid proxy server on RHEL/CentOS 6.x .In this practical,we will install Squid version 3.5.0 package in CentOS 6.5 / RHEL 6.5 . Squid server are designed to run in Unix like operating system. Up to version 2.7, Windows Operating System was supportive. Till…
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…
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…
shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory While working on setting new squid transparent proxy in network.I faced an unusual error while restarting the Squid service. The getcwd() function copies an absolute pathname of the current working directory to the array pointed to by buf, which is…
In this tutorial, we will setup Owncloud 6 with self signed SSL certificate on Ubuntu 13.10 Server.In other words,setting HTTPS for Owncloud 6 in Ubuntu 13.10 Server.In recent months, Owncloud 6 has been released.In our last post,we have already written document on “how to install Owncloud 6 in Ubuntu 13.10 Server“.Hence, we expect,you have already…
After installing the Squid Version 3.5.0 in CentOS 6.5. I got the issue,squid service failed to start/restart. Generally, after installing the package with by-default configuration,we can start/stop/restart the service without any problem.This time squid gave me trouble here. I checked the /var/log/messages and there was no sufficient logs giving any hint. In other words,I have…
In this tutorial we will learn, how to install and configure rsyslog 7.6 version on RHEL 6.5/CentOS 6.5 .The scenario is,install and setup rsyslog Centralized Logging Server in RHEL/CentOS 6.5. All the logs from client servers will be sent to Centralized logging server i.e rsyslog server. Check Pre-installed rsyslog package Step 1: First of all…
While configuring the rsyslog, without verifying we 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.
Today,while working in cloud server.I faced an issue.I was copying some files to s3bucket,which I have mounted by using s3fs package. One every copy command(i.e cp),I was getting error – fatal error: error writing to /tmp/ccwAjc9Z.s: No space left on device. The problem was not new for me.I have seen this problem earlier also.The problem…
In this post we will learn, how to backup and restore iptables on Linux systems .As a Linux System Administrator,it is important to understand iptables. With iptables,you can secure the Linux Operating System.In this post,we have written a quick way to take backup and restore the iptables in Linux systems. iptables is a user space…
In this tutorial we will learn, how to add before entry widget in Genesis Child Theme. It is mine new journey with Genesis Framework.Working and exploring,to make theme on it.In my some posts,I already stated I recently got my premium theme.Before this I played on,already available free Genesis Theme. In my some other sites,I decently…
In this tutorial,we will learn how to use yum command to download rpm file without installing in linux system.It was before RHEL 5 arrival, when I used to download the source rpm packages by using up2date -d package-name Now things are changed,in Red Hat based Operating System above version 5.x . We use the yum…
In this tutorial we will learn,how to find installed and enabled apache module in Debian/Ubuntu. The method is applicable to Debian based operating system.As a system admin, sometimes we have to find which Apache module is installed. Every System Admin has their own style of work. How generally we do ,I am sharing in this…
In this tutorial we will learn,how to install MongoDB server on Ubuntu 12.04 LTS. MongoDB is one the popular nosql database.It is a cross-platform document-oriented database system.MongoDB has its interactive shell called mongo .In recent years,many companies started using MongoDB.To know about more details on MongoDB,you can visit the Wikipedia link How to install MongoDB…
In this post we will learn,Run cron job alternate week day. Today, I met with very good question i.e how to run cron job alternate week day. The user wants to run the script in alternate Saturday.When I read this question first time,it make me to take a pause for a while. Later thinking on…