How to install dig on CentOS, Fedora, or Redhat

To install the dig command on CentOS, Fedora, or Redhat run the following:

yum install bind-utils

Filed under: Uncategorized by — aaron @ 8:22 pm

PHP 5.2.9 Compile with mcrypt failing on CentOS 5

If you are getting the following message while trying to compile PHP 5.2.9 with mcrypt:

/usr/bin/ld: cannot find -lltdl
collect2: ld returned 1 exit status
make: *** [libphp5.la] Error 1

Then try this:

yum install libtool-ltdl-devel

Filed under: Uncategorized by — aaron @ 12:50 am

Compiling PHP 5 on CentOS 5 64 Bit configure: error: mysql configure failed.

If you are receiving the following error while trying to compile PHP 5 on CentOS or RHEL 5 64bit:

configure: error: mysql configure failed. Please check config.log for more information.

And in the config.log you see:

/usr/bin/ld: skipping incompatible /usr/lib/mysql/libmysqlclient.so when searching for -lmysqlclient

Then add the following to your configure line:

–libdir=/usr/lib64 –with-libdir=lib64

Filed under: Uncategorized by — aaron @ 6:19 pm

Howto Disable Firewall (iptables) in Linux (Redhat/Fedora/CentOS)

You can run the following to stop iptables from running, by default on Redhat Entrprise Linux 4 and 5, Fedora, and CentOS the firewall is enabled:

chkconfig iptables off
service iptables save
service iptables stop

Filed under: Uncategorized by — aaron @ 12:49 am

How to find out which processes are using RAM in Linux?

An easy quick way to find out which processes are using RAM in linux is the following:

top -c

Then

Shift + M

This will list the top processes using the most RAM.

Filed under: Uncategorized by — aaron @ 12:46 am

yum upgrade error (openvz) on Lxlab’s HyperVM

When I try and do a yum upgrade on an HyperVM openvz node, I’m getting the following error:

Total download size: 220 M
Is this ok [y/N]: y
Downloading Packages:
http://download.lxlabs.com/download/update/centos-5/x86_64/t emp/x86_64/php-5.2.6-5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
http://download.lxlabs.com/download/update/centos-5/x86_64/t emp/x86_64/php-cli-5.2.6-5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
http://download.lxlabs.com/download/update/centos-5/x86_64/t emp/x86_64/php-common-5.2.6-5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.

Error Downloading Packages:
php – 5.2.6-5.x86_64: failure: temp/x86_64/php-5.2.6-5.x86_64.rpm from lxlabsupdate: [Errno 256] No more mirrors to try.
php-cli – 5.2.6-5.x86_64: failure: temp/x86_64/php-cli-5.2.6-5.x86_64.rpm from lxlabsupdate: [Errno 256] No more mirrors to try.
php-common – 5.2.6-5.x86_64: failure: temp/x86_64/php-common-5.2.6-5.x86_64.rpm from lxlabsupdate: [Errno 256] No more mirrors to try.

To fix this, you can run the following:

yum clean all

yum upgrade

Filed under: Uncategorized by — aaron @ 3:05 pm

How to find out which processes are using RAM in Linux?

An easy quick way to find out which processes are using RAM in linux is the following:

top -c

Then

Shift + M

This will list the top processes using the most RAM.

Filed under: Uncategorized by — aaron @ 6:44 pm

Fantastico not installing (Not Installed)

Sometimes, even after we install fantastico it will show as “Not Installed”. Or during the installation itself, it may show an error message like “Buggy version of wget”.

To fix this, we need to correct the version of wget.

For 32-bit:

rpm -qa wget
wget http://mirrors.kernel.org/fedora/core/5/i386/os/
Fedora/RPMS/wget-1.10.2-3.2.1.i386.rpm
rpm -e wget
rpm -ivh –force wget-1.10.2-3.2.1.i386.rpm
rpm -qa wget

For 64-bit:

rpm -qa wget
wget http://download.fedora.redhat.com/pub/fedora/linux/releases/7/
Everything/x86_64/os/Fedora/wget-1.10.2-15.fc7.x86_64.rpm
rpm -e wget
rpm -ivh –force wget-1.10.2-15.fc7.x86_64.rpm
rpm -qa wget

Thats it!!!

Thanks for this article Gopi!

Filed under: Uncategorized by — aaron @ 9:35 pm

How to disable Firewall or SELinux in CentOS 5

Disabling the Firewall and/or SELinux on CentOS 5 is fairly easy, just run the following command and you can make all the necessary changes!

/usr/bin/system-config-securitylevel-tui

Filed under: Uncategorized by — aaron @ 5:56 pm

CentOS 5 yum error: Error: None

On some new installs of CentOS we have been getting the following error while using yum:

[root@s yum]# yum upgrade
Error: None

To fix this phython sqlite and yum must be re-installed.

First remove phython sqlite and yum, then download and re-install them using the following:

rpm -ivh yum-metadata-parser-1.1.2-2.el5.x86_64.rpm
rpm -ivh python-sqlite-1.1.7-1.2.1.x86_64.rpm
rpm -ivh yum-3.2.8-9.el5.centos.1.noarch.rpm
rpm -ivh yum-updatesd-0.9-2.el5.noarch.rpm

Then execute:

yum clean all
yum upgrade

This should fix the issue.

If you are still having issues try the following:

rm /var/lib/rpm/__db*
rpm –rebuilddb
yum clean all
yum upgrade

Thanks Gopi for this article!

Filed under: Uncategorized by — aaron @ 4:32 pm