Linux

System Monitoring

For some Linux administrators, the Linux server monitoring activity may be a definite need, because with the monitoring server, an optimal server where it has been fulfilled or not the resources owned by a server to support the distribution process.

Many of them still use the old way to collect their Linux system data, let’s call it the method of using sosreport in a Linux machine. Where the resulting data will be a lot and there is a need for the selection of data to be used, not to mention the creation of graph reports, so it is a little inconvenient and requires a long time for users.

In this share, I will share a little of my knowledge about the implementation of hard disk uses using scsi-target-utils and initiator-utilities in RHEL / CentOS / Fedora Linux OS. Where in making the ISCSI hard drive, later in the next article we will use it for High availability Cluster Web Server storage server. For the installation and configuration of the hard drive on RHEL / CentOS / Fedora, as follows:

If you want to delete an object in the Squid proxy server cache, all you can do is manually and automatically delete the Squid proxy cache, here we will discuss how to maintain our proxy machine, the following methods can be run manually or automatically in removing the cache your squid proxy.

Manually delete the squid proxy cache;
1. Stop/stop the running Squid process

# /etc/init.d/squid stop

2. Clean all of Squid’s swap directory cache

On this occasion, we will discuss the process of installing Youtube Video Cache with Squid and Nginx on RHEL / CentOS where in previous writings more often used Ubuntu server in terms of creating a proxy server, but this time we will use OS Linux RHEL / CentOS 6 where to further explore our knowledge (I am personally) in terms of Linux networking: D. However, if you are still using the proxy world (ubuntu server), maybe this is one alternative in making proxy servers on RPM-based machines.
Install the packages needed in the squid installation process:

On this occasion, the Techsoftcenter web will share a little about “Clusters” where according to the title above is “High Availability: Linux Clustering on RHEL6 / CentOS6 with Luci and Ricci”. as we know that to do clustering can use several methods but for the opportunity this time we learn a little “High Availability – Linux Clustering using Luci and Ricci on OS Linux RHEL6 / CentOS6” To equalize perception, this time topology information uses Host Server: IP 192.168,100,250, has several VMs as follows:
arrif-base: IP 192.168,100,120 (arrif-base)
arrif-vm1: IP 192.168.100.102 (node1)
arrif-vm1: IP 192.168.100.103 (node2)
IP: 192.168.100.121 (virtual IP that is automatically formed by Ricci on the active node)
Where for the storage media to use the hard drive, if you don’t have a storage media, you can start creating an iSCSI target / multipath initiator on RHEL6 / CentOS6 Linux first on the article link.
First, do / configure / etc / hosts or you can use DNS server, configuration / etc / hosts