Category: CentOS – Page 2

Install Python 3.8 on CentOS 6 from source

Posted on July 18, 2020 by ServerOk

To install Python 3.8 on CentOS, you need to install OpenSSL as the one installed by CentOS from yum is very old.

cd /usr/local/src
wget https://www.openssl.org/source/openssl-1.1.1g.tar.gz
tar xvf openssl-1.1.1g.tar.gz
cd openssl-1.1.1g
./config --prefix=/usr/serverok/openssl --openssldir=/usr/serverok/openssl no-ssl2
make
make install

cd /usr/local/src

wget https://www.openssl.org/source/openssl-1.1.1g.tar.gz

tar xvf openssl-1.1.1g.tar.gz

cd openssl-1.1.1g

./config --prefix=/usr/serverok/openssl --openssldir=/usr/serverok/openssl no-ssl2

make

make install

Now edit file

vi ~/.bash_profile

1	vi ~/.bash_profile

at end of the file, add

export PATH=/usr/serverok/openssl/bin:$PATH
export LD_LIBRARY_PATH=/usr/serverok/openssl/lib
export LC_ALL="en_US.UTF-8"
export LDFLAGS="-L/usr/serverok/openssl/lib -Wl,-rpath,/usr/serverok/openssl/lib"

export PATH=/usr/serverok/openssl/bin:$PATH

export LD_LIBRARY_PATH=/usr/serverok/openssl/lib

export LC_ALL="en_US.UTF-8"

export LDFLAGS="-L/usr/serverok/openssl/lib -Wl,-rpath,/usr/serverok/openssl/lib"

Make the settings active with command

source ~/.bash_profile

1	source ~/.bash_profile

Now we can install Python 3.8 with

cd /usr/local/src
wget https://www.python.org/ftp/python/3.8.4/Python-3.8.4.tar.xz
tar xvf Python-3.8.4.tar.xz
cd /usr/local/src/Python-3.8.4
make clean && make distclean
./configure --enable-optimizations  --with-openssl=/usr/serverok/openssl/
make altinstall

cd /usr/local/src

wget https://www.python.org/ftp/python/3.8.4/Python-3.8.4.tar.xz

tar xvf Python-3.8.4.tar.xz

cd /usr/local/src/Python-3.8.4

make clean && make distclean

./configure --enable-optimizations --with-openssl=/usr/serverok/openssl/

make altinstall

Now python 3.8 will be available […]

yum list all available packages in a repo

Posted on April 18, 2020 by ServerOk

To list all packages available on a specific repo, run

yum  --disablerepo="*" --enablerepo="REPO_NAME_HERE" list available
<pre>

You can get list of all available repos with command

<pre>
yum repolist

yum --disablerepo="*" --enablerepo="REPO_NAME_HERE" list available

<pre>

You can get list of all available repos with command

<pre>

yum repolist

Example:

yum  --disablerepo="*" --enablerepo="litespeed" list available

1	yum --disablerepo="*" --enablerepo="litespeed" list available

This command list all packages available in repo “litespeed” […]

Install PHP 7 on CentOS VestaCP

Posted on March 23, 2020 by ServerOk

To install PHP 7. you need to first enable epel and remi repo.

yum install -y epel-release
rpm -Uvh http://rpms.remirepo.net/enterprise/remi-release-7.rpm

1 2	yum install -y epel-release rpm -Uvh http://rpms.remirepo.net/enterprise/remi-release-7.rpm

Remove existing PHP

yum -y remove php

1	yum -y remove php

Install PHP 7.3

yum --enablerepo=remi-php73 install php73-php php73-php-mbstring php73-php-mysqlnd php73-php-gd php73-php-fpm php73-php-intl php73-php-cli php73-php-xml php73-php-opcache php73-php-pdo php73-php-gmp php73-php-process php73-php-pecl-imagick php73-php-devel

1	yum --enablerepo=remi-php73 install php73-php php73-php-mbstring php73-php-mysqlnd php73-php-gd php73-php-fpm php73-php-intl php73-php-cli php73-php-xml php73-php-opcache php73-php-pdo php73-php-gmp php73-php-process php73-php-pecl-imagick php73-php-devel

start php-fpm

service php-fpm stop
service php73-php-fpm start

1 2	service php-fpm stop service php73-php-fpm start

Set php 7.3 as default PHP for cli

rm /usr/bin/php
ln -s /usr/bin/php73 /usr/bin/php

1 2	rm /usr/bin/php ln -s /usr/bin/php73 /usr/bin/php

Restart apache

service httpd restart

1	service httpd restart

[…]

rpmdb DB_RUNRECOVERY: Fatal error, run database recovery

Posted on March 18, 2020 by ServerOk

When running yum update on a CentOS server, i get following error.

[root@ip-172-30-0-39 ~]# yum update
error: rpmdb: BDB0113 Thread/process 12797/46913889995840 failed: BDB1507 Thread died in Berkeley DB library
error: db5 error(-30973) from dbenv->failchk: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery
error: cannot open Packages index using db5 -  (-30973)
error: cannot open Packages database in /var/lib/rpm
CRITICAL:yum.main:

Error: rpmdb open failed
[root@ip-172-30-0-39 ~]#

[root@ip-172-30-0-39 ~]# yum update

error: rpmdb: BDB0113 Thread/process 12797/46913889995840 failed: BDB1507 Thread died in Berkeley DB library

error: db5 error(-30973) from dbenv->failchk: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery

error: cannot open Packages index using db5 - (-30973)

error: cannot open Packages database in /var/lib/rpm

CRITICAL:yum.main:

Error: rpmdb open failed

[root@ip-172-30-0-39 ~]#

To fix it, run

rm -f /var/lib/rpm/__db.00*

1	rm -f /var/lib/rpm/__db.00*

[…]

rpm verify packages

Posted on March 6, 2020 by ServerOk

To verify a package installed on system, you can use

rpm -V PKG_NAME

1	rpm -V PKG_NAME

Example

[root@hello-1 curl-curl-7_69_0]# rpm -V bind
S.5....T.  c /etc/named.conf
[root@hello-1 curl-curl-7_69_0]#

[root@hello-1 curl-curl-7_69_0]# rpm -V bind

S.5....T. c /etc/named.conf

[root@hello-1 curl-curl-7_69_0]#

Here bind package have /etc/named.conf file modified. To verify all packages on system, run

rpm -Va

rpm -Va

[…]

CentOS 7 resolv.conf make changes permanent

Posted on December 31, 2019 (December 31, 2019) by ServerOk

On rebooting CentOS 7 server, changes made to resolv.conf is lost. This is becaise one of the network interface is configured to use DNS server.

[root@server ~]# grep DNS /etc/sysconfig/network-scripts/ifcfg-*
/etc/sysconfig/network-scripts/ifcfg-eno1:DNS1="127.0.0.1"
[root@server ~]#

[root@server ~]# grep DNS /etc/sysconfig/network-scripts/ifcfg-*

/etc/sysconfig/network-scripts/ifcfg-eno1:DNS1="127.0.0.1"

[root@server ~]#

To fix, edit

vi /etc/sysconfig/network-scripts/ifcfg-eno1

1	vi /etc/sysconfig/network-scripts/ifcfg-eno1

Remove the line

DNS1="127.0.0.1"

1	DNS1="127.0.0.1"

Now NetworkManager will not modify /etc/resolv.conf file on boot. Or you can set valid DNS servers in network config file like […]

Install Pure-FTPd on CentOS with Virtual Users

Posted on December 30, 2019 by ServerOk

To install Pure-FTPd on CentOS, run

yum install -y pure-ftpd

1	yum install -y pure-ftpd

Edit configuration file

vi /etc/pure-ftpd/pure-ftpd.conf

1	vi /etc/pure-ftpd/pure-ftpd.conf

To disable anonymous FTP, find

NoAnonymous                  no

1	NoAnonymous no

Replace with

NoAnonymous                  yes

1	NoAnonymous yes

To enable Virtual Users, find

# PureDB                        /etc/pure-ftpd/pureftpd.pdb

1	# PureDB /etc/pure-ftpd/pureftpd.pdb

Uncomment the line.

PureDB                        /etc/pure-ftpd/pureftpd.pdb

1	PureDB /etc/pure-ftpd/pureftpd.pdb

To Allow Apache user to login via FTP, find

MinUID                      1000

1	MinUID 1000

Replace with

MinUID                      47

MinUID 47

I set MinUID value to 47, as apache user have UID/GID of […]

Install vim from source on CentOS

Posted on December 29, 2019 by ServerOk

To install vim from source on CentOS server, run

yum -y install  ncurses-devel
cd /usr/local/src
wget https://github.com/vim/vim/archive/master.zip	
unzip master.zip
cd vim-master/src/
./configure
make
make install

yum -y install ncurses-devel

cd /usr/local/src

wget https://github.com/vim/vim/archive/master.zip

unzip master.zip

cd vim-master/src/

./configure

make

make install

This will install latest version of vim. You can start it with command

vim

vim

To get it work with “vi” command, i removed preinstalled vim editor with command

rpm -e --nodeps  vim-minimal

1	rpm -e --nodeps vim-minimal

Now create a symlink with

ln -s /usr/local/bin/vim /bin/vi

1	ln -s /usr/local/bin/vim /bin/vi

[…]

Install clamav Antivirus on CentOS 7

Posted on December 17, 2019 by ServerOk

ClamAV is provided by EPEL repo. Install epel repo

yum install -y epel-release

1	yum install -y epel-release

Install ClamAV with

yum install clamav

1	yum install clamav

[…]

Install OpenLiteSpeed on CentOS

Posted on December 13, 2019 by ServerOk

To install OpenLiteSpeed web server on CentOS, install repository for your CentOS version For CentOS 6

rpm -Uvh http://rpms.litespeedtech.com/centos/litespeed-repo-1.1-1.el6.noarch.rpm

1	rpm -Uvh http://rpms.litespeedtech.com/centos/litespeed-repo-1.1-1.el6.noarch.rpm

For CentOS 7

rpm -Uvh http://rpms.litespeedtech.com/centos/litespeed-repo-1.1-1.el7.noarch.rpm

1	rpm -Uvh http://rpms.litespeedtech.com/centos/litespeed-repo-1.1-1.el7.noarch.rpm

For CentOS 8

rpm -Uvh http://rpms.litespeedtech.com/centos/litespeed-repo-1.1-1.el8.noarch.rpm

1	rpm -Uvh http://rpms.litespeedtech.com/centos/litespeed-repo-1.1-1.el8.noarch.rpm

To install OpenLiteSpeed, run

yum install openlitespeed

1	yum install openlitespeed

Before you can install PHP, you need epel repository enabled with

yum install epel-release

1	yum install epel-release

Install PHP with

yum install lsphp73 lsphp73-common lsphp73-mysql lsphp73-gd lsphp73-process lsphp73-mbstring lsphp73-xml lsphp73-mcrypt lsphp73-pdo lsphp73-imap lsphp73-soap lsphp73-bcmath lsphp73-json lsphp73-mysqlnd

1	yum install lsphp73 lsphp73-common lsphp73-mysql lsphp73-gd lsphp73-process lsphp73-mbstring lsphp73-xml lsphp73-mcrypt lsphp73-pdo lsphp73-imap lsphp73-soap lsphp73-bcmath lsphp73-json lsphp73-mysqlnd

Set symlink

ln -sf /usr/local/lsws/lsphp73/bin/lsphp /usr/local/lsws/fcgi-bin/lsphp5

1	ln -sf /usr/local/lsws/lsphp73/bin/lsphp /usr/local/lsws/fcgi-bin/lsphp5

Start OpenLiteSpeed with

/usr/local/lsws/bin/lswsctrl start

1	/usr/local/lsws/bin/lswsctrl start

To stop […]