CentOS - Revision history

Christoph: /* LAMP on CentOS */

2016-08-27T00:00:38Z

‎LAMP on CentOS

Christoph: /* How to switch from FirewallD to Iptables on CentOS 7 */

2016-07-21T20:59:01Z

‎How to switch from FirewallD to Iptables on CentOS 7

Christoph at 00:40, 21 July 2016

2016-07-21T00:40:44Z

Christoph: /* Iptables vs. firewalld */

2015-05-14T01:52:36Z

‎Iptables vs. firewalld

Christoph at 21:21, 27 February 2015

2015-02-27T21:21:51Z

Christoph at 08:02, 11 November 2014

2014-11-11T08:02:07Z

Christoph: /* LAMP on CentOS */

2014-10-28T06:52:37Z

‎LAMP on CentOS

Christoph at 06:51, 28 October 2014

2014-10-28T06:51:50Z

Christoph: New page: '''CentOS''' (abbreviated from '''Community Enterprise Operating System''') is a Linux distribution that attempts to provide a free, enterprise class, community-supported computing pla...

2014-07-02T04:31:54Z

New page: '''CentOS''' (abbreviated from '''Community Enterprise Operating System''') is a Linux distribution that attempts to provide a free, enterprise class, community-supported computing pla...

New page

'''CentOS''' (abbreviated from '''Community Enterprise Operating System''') is a [[Linux]] distribution that attempts to provide a free, enterprise class, community-supported computing platform which aims to be 100% binary compatible with its upstream source, Red Hat Enterprise Linux (RHEL).

==Packages to install==

* Install the "Development Tools":
yum groupinstall 'Development Tools' -y

These core development tools are required to compile software and build new [[rpm]]s and including the following packages:

:autoconf
:bison
:gdb
:flex
:gcc (c/c++ compiler)
:gcc-c++ compiler
:redhat-rpm-config
:strace
:strace64
:rpm-build
:make
:automake
:pkgconfig
:gettext
:libtool
:binutils (and all dependencies)

==External links==
* [http://centos.org/ Official website]

[[Category:Linux Command Line Tools]]

@@ Line 2: / Line 2: @@
 ==LAMP on CentOS==
 The following CLI one-liner will install and configure everything you need for a basic LAMP stack setup (including the [[iptables|firewall]]):
   sudo sh -c "yum install httpd httpd-devel mysql mysql-server mysql-devel php \
@@ Line 8: / Line 9: @@
     && service httpd start && chkconfig httpd on && chkconfig mysqld on && \
     iptables -I INPUT -p tcp -m tcp --dport 80 -j ACCEPT && /etc/init.d/iptables save"
 ==Packages to install==

@@ Line 61: / Line 61: @@
   -A INPUT -i lo -j ACCEPT
   COMMIT
 If you are saving your rules in that <code>/etc/sysconfig/iptables</code> file, you will then need to run one of the following commands:
@@ Line 74: / Line 78: @@
   $ iptables -L
 and that your server is listening on those ports you opened (22 and 80 in the above example):

@@ Line 33: / Line 33: @@
 :binutils (and all dependencies)
-==Iptables vs. firewalld==
+==How to switch from FirewallD to Iptables on CentOS 7==
 Starting with RHEL 7 / CentOS 7, [https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Migration_Planning_Guide/sect-Red_Hat_Enterprise_Linux-Migration_Planning_Guide-Security_and_Access_Control.html firewalld was introduced] to manage [[iptables]]. As such, you will either need to use <code>`firewall-cmd`</code> commands or disable firewalld and enable iptables.

@@ Line 36: / Line 36: @@
 Starting with RHEL 7 / CentOS 7, [https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Migration_Planning_Guide/sect-Red_Hat_Enterprise_Linux-Migration_Planning_Guide-Security_and_Access_Control.html firewalld was introduced] to manage [[iptables]]. As such, you will either need to use <code>`firewall-cmd`</code> commands or disable firewalld and enable iptables.
-If you prefer to use the classic iptables setup, you will first need to stop and mask the firewalld service:
+If you prefer to use the classic iptables setup, you will first need to stop and mask the firewalld service (see: [[systemd]] for details):
   $ systemctl stop firewalld

← Older revision		Revision as of 21:21, 27 February 2015
Line 84:		Line 84:

	If you reboot your server after the above, your iptables rules should be saved and loaded again.		If you reboot your server after the above, your iptables rules should be saved and loaded again.
		+
		+	==Remove old/unneeded kernels==
		+
		+	It is sometimes necessary to remove old kernels, especially if you have a <code>/boot</code> partition running out of free space. The easiest (and safest) way to manually remove old/unneeded kernels is by using <code>[[yum]]</code>.
		+
		+	You can use <code>`yum list`</code> to find out what kernels are installed:
		+	$ yum list kernel.*
		+	kernel.x86_64 2.6.32-431.29.2.el6 @updates
		+	kernel.x86_64 2.6.32-504.el6 @base
		+	kernel.x86_64 2.6.32-504.8.1.el6 @updates
		+
		+	The above output shows that there are 3 kernels installed. It is a good practice to keep 3 to 5 kernels just in case a kernel update breaks something and you have to revert to an older version.
		+
		+	To remove the oldest version in the above kernel list, execute the following:
		+	$ yum remove kernel-2.6.32-431.29.2.el6
		+
		+	You can also use a <code>yum</code> plugin to keep a given number of kernels and automatically remove the older ones (e.g., always keep the latest 3 kernels). You can edit the <code>/etc/yum/pluginconf.d/installonlyn.conf</code> file (or create it if it does not exist) and add/change the following lines:
		+
		+	[main]
		+	enabled=1
		+	# set the number of package versions to keep:
		+	tokeep=3
		+
		+	The "<code>enabled=1</code>" line enables the <code>yum</code> plugin. The next time you run a <code>`yum update`</code>, <code>yum</code> will automatically remove the older versions and keep the latest 3 (note: This plugin will never remove your current working kernel). If you would prefer to keep any and all previous kernels, simply change that line to "<code>tokeep=0</code>".

	==External links==		==External links==

@@ Line 32: / Line 32: @@
 :libtool
 :binutils (and all dependencies)
 ==External links==

← Older revision		Revision as of 06:51, 28 October 2014
Line 1:		Line 1:
	'''CentOS''' (abbreviated from '''Community Enterprise Operating System''') is a [[Linux]] distribution that attempts to provide a free, enterprise class, community-supported computing platform which aims to be 100% binary compatible with its upstream source, Red Hat Enterprise Linux (RHEL).		'''CentOS''' (abbreviated from '''Community Enterprise Operating System''') is a [[Linux]] distribution that attempts to provide a free, enterprise class, community-supported computing platform which aims to be 100% binary compatible with its upstream source, Red Hat Enterprise Linux (RHEL).
		+
		+	==LAMP on CentOS==
		+	The following CLI one-liner will install and configure everything you need for a basic LAMP stack setup (including the [[iptables\|firewall]]):
		+	sudo sh -c "yum install httpd httpd-devel mysql mysql-server mysql-devel php php-mysql php-common php-gd php-mbstring php-mcrypt php-devel php-xml -y; service mysqld start && mysql_secure_installation && service mysqld restart && service httpd start && chkconfig httpd on && chkconfig mysqld on &&iptables -I INPUT -p tcp -m tcp --dport 80 -j ACCEPT && /etc/init.d/iptables save"

	==Packages to install==		==Packages to install==