Linux Ask! » Fedora http://www.linuxask.com Linux Ask! is a Q & A web site specific for Linux related questions such as how to use common Linux commands. Tue, 05 May 2015 07:15:40 +0000 en-US hourly 1 http://wordpress.org/?v=3.9.1 Check which Apache modules are loaded http://www.linuxask.com/questions/check-which-apache-modules-are-loaded http://www.linuxask.com/questions/check-which-apache-modules-are-loaded#comments Sat, 03 Jul 2010 04:07:03 +0000 http://www.linuxask.com/?p=1821 Related posts:
  1. How to tell if Apache 2 is using prefork or worker MPM?
  2. Remove default Fedora/RHEL/CentOS default Apache welcome page
  3. Check the number of active Apache connection
]]> Check which Apache modules are loaded

Answer:

To check which Apache modules are loaded, in RHEL/Fedora/CentOS, type

# httpd -M

In Debian/Ubuntu

# sudo apache2ctl -M

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  1. How to tell if Apache 2 is using prefork or worker MPM?
  2. Remove default Fedora/RHEL/CentOS default Apache welcome page
  3. Check the number of active Apache connection

]]> http://www.linuxask.com/questions/check-which-apache-modules-are-loaded/feed 0 How to tell if Apache 2 is using prefork or worker MPM? http://www.linuxask.com/questions/how-to-tell-if-apache-2-is-using-prefork-or-worker-mpm http://www.linuxask.com/questions/how-to-tell-if-apache-2-is-using-prefork-or-worker-mpm#comments Thu, 15 Apr 2010 14:32:41 +0000 http://www.linuxask.com/?p=1592 [...]
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  2. Remove default Debian/Ubuntu default Apache welcome page
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]]> How to tell if Apache 2 is using prefork or worker MPM?

Answer:

If you are running in Red Hat Linux/ Fedora/ CentOS

# httpd -V
....
Architecture:   64-bit
Server MPM:     Prefork
  threaded:     no
    forked:     yes (variable process count)
...

If you are running in Debian/ Ubuntu, you can use apache2 -V, which get the same output as above.

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]]> http://www.linuxask.com/questions/how-to-tell-if-apache-2-is-using-prefork-or-worker-mpm/feed 0 Immediate time synchronization in RHEL/CentOS/Fedora http://www.linuxask.com/questions/immediate-time-synchronization-in-rhelcentosfedora http://www.linuxask.com/questions/immediate-time-synchronization-in-rhelcentosfedora#comments Fri, 12 Feb 2010 10:23:09 +0000 http://www.linuxask.com/?p=1182 Related posts:
  1. Remove default Fedora/RHEL/CentOS default Apache welcome page
  2. Setup time synchronisation in CentOS
  3. Restart networking in Fedora/CentOS/Red Hat Linux
]]> Immediate time synchronization in RHEL/CentOS/Fedora

Answer:

If you want to sync the system time without installing ntpd package, rdate is an older way but it will do what you need.

# rdate -s ntp0.cornell.edu

You can find a list of time servers at: http://pank.org/blog/2004/08/time-server-list.html

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]]> http://www.linuxask.com/questions/immediate-time-synchronization-in-rhelcentosfedora/feed 0 Remove package with Yum http://www.linuxask.com/questions/remove-package-with-yum http://www.linuxask.com/questions/remove-package-with-yum#comments Sun, 10 Jan 2010 10:44:12 +0000 http://www.linuxask.com/?p=673 Related posts:
  1. How to remove installed package using RPM?
  2. How to install a RPM package
  3. How to upgrade an installed RPM package
]]> Remove package with Yum

Answer:

You can use the following command to remove packages using yum,

e.g. remove Firefox

yum remove firefox

To remove multiple packages, try

yum remove firefox gedit

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]]> http://www.linuxask.com/questions/remove-package-with-yum/feed 0 How to remove installed package using RPM? http://www.linuxask.com/questions/how-to-remove-installed-package-using-rpm http://www.linuxask.com/questions/how-to-remove-installed-package-using-rpm#comments Sun, 10 Jan 2010 10:40:42 +0000 http://www.linuxask.com/?p=669 Related posts:
  1. Remove package with Yum
  2. How to upgrade an installed RPM package
  3. How to check if a rpm package is already installed?
]]> How to remove installed package using RPM?

Answer:

To remove installed package using rpm, use the following command

e.g. remove Firefox

rpm -e firefox

To remove multiple packages, try

rpm -e firefox gedit

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  2. How to upgrade an installed RPM package
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]]> http://www.linuxask.com/questions/how-to-remove-installed-package-using-rpm/feed 0 How to install bulk packages using yum with groupinstall? http://www.linuxask.com/questions/how-to-install-bulk-packages-using-yum-with-groupinstall http://www.linuxask.com/questions/how-to-install-bulk-packages-using-yum-with-groupinstall#comments Fri, 01 Jan 2010 05:28:42 +0000 http://www.linuxask.com/?p=386 [...]
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  3. Remove package with Yum
]]> How to install bulk packages using yum with groupinstall?

Answer:

Sometimes, if you forgot to select "Development Tools" during Fedora/CentOS installations, you can add them later by using one command

yum groupinstall "Development Tools"

Which save you a lot of times from installing the needed packages one by one.

To see what options are available for groupinstall, try

yum grouplist

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]]> http://www.linuxask.com/questions/how-to-install-bulk-packages-using-yum-with-groupinstall/feed 0 How to extract RPM package without installing it http://www.linuxask.com/questions/how-to-extract-rpm-package-without-installing-it http://www.linuxask.com/questions/how-to-extract-rpm-package-without-installing-it#comments Thu, 31 Dec 2009 16:20:22 +0000 http://www.linuxask.com/?p=298 Related posts:
  1. How to install a RPM package
  2. How to upgrade an installed RPM package
  3. How to remove installed package using RPM?
]]> How to extract RPM package without installing it

Answer:

Assume you have foo.rpm, type the following command to extract the rpm's contents

rpm2cpio foo.rpm | cpio -idmv

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]]> http://www.linuxask.com/questions/how-to-extract-rpm-package-without-installing-it/feed 0 How to turn off SELinux? http://www.linuxask.com/questions/how-to-turn-off-selinux http://www.linuxask.com/questions/how-to-turn-off-selinux#comments Sat, 19 Dec 2009 15:36:17 +0000 http://www.linuxask.com/?p=22 [...]
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]]> How to turn off SELinux?

Answer: (pick either one)

1. Change the run-time configuration (won't take effect when you reboot)

# sestatus informs you of the two permission mode statuses,
# the current mode in runtime and the mode from the config
# file referenced during boot:

sestatus | grep -i mode
Current mode: enforcing
Mode from config file: enforcing

# Changing the runtime enforcement doesn't effect the
# boot time configuration:

setenforce 1
sestatus | grep -i mode
Current mode: permissive
Mode from config file: enforcing

2. Turn off SELinux permanently, use the following command

system-config-securitylevel

Source: http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/selinux-guide/rhlcommon-section-0068.html

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]]> http://www.linuxask.com/questions/how-to-turn-off-selinux/feed 0 How to check if a rpm package is already installed? http://www.linuxask.com/questions/how-to-check-if-a-rpm-package-is-already-installed http://www.linuxask.com/questions/how-to-check-if-a-rpm-package-is-already-installed#comments Mon, 30 Nov 2009 00:00:00 +0000 http://www.linuxask.com/?p=239 Related posts:
  1. How to upgrade an installed RPM package
  2. How to remove installed package using RPM?
  3. How to check if a Perl module is already installed?
]]> How to check if a rpm package is already installed?

Answer:

To query if a package is installed, e.g.

rpm -q httpd

To display package information, e.g.

rpm -qi httpd

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]]> http://www.linuxask.com/questions/how-to-check-if-a-rpm-package-is-already-installed/feed 1 How to compile APC module for PHP http://www.linuxask.com/questions/how-to-compile-apc-module-for-php http://www.linuxask.com/questions/how-to-compile-apc-module-for-php#comments Tue, 02 Jun 2009 10:47:36 +0000 http://www.linuxask.com/?p=412 [...]
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]]> How to compile APC module for PHP

Answer:

The following steps works in RHEL/CentOS

1. Download the latest APC from PECL

wget http://pecl.php.net/get/APC

2. Extract the APC source package and compile/install it

tar -xvf APC
cd APC-X.X.X (replace with your downloaded version)
phpize
./configure
make && make install

3. Enable APC in PHP configuration

echo "extension=apc.so" > /etc/php.d/apc.ini

4. Restart the httpd and use phpinfo() to verify if APC is running

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]]> http://www.linuxask.com/questions/how-to-compile-apc-module-for-php/feed 1