To update cpanel server license, run
/usr/local/cpanel/cpkeycltExample
[root@pbcp-22-01 ~]# /usr/local/cpanel/cpkeyclt
Updating cPanel license...Done. Update succeeded.
Building global cache for cpanel...Done
[root@pbcp-22-01 ~]# Back to Cpanel Server
To install PHP 5.6 on CentOS 7, enable EPEL repo and remi repo
yum install epel-release -y rpm -ivh https://rpms.remirepo.net/enterprise/remi-release-7.rpm
Install yum-utils and enable remi-php56 repo
yum install yum-utils yum-config-manager --enable remi-php56
Install PHP 5.6 with
yum install -y php php-bcmath php-cli php-common php-devel php-gd \
php-imap php-intl php-json php-ldap php-lz4 php-mbstring php-mysqlnd \
php-soap php-intl php-opcache php-xml php-pdo
yum install PKG_NAME
yum remove
Example for installing php and GD
yum install php php-gd
When you need to update all install software, run
yum update
List all available software
yum list available yum list available "software-name"
List all installed software
yum list installed
See yum
EPEL (Extra Packages for Enterprise Linux) provide additional software for CentOS and RHEL.
You can find more information about EPEL at
http://fedoraproject.org/wiki/EPEL
On CentOS 7/8, you can enable EPEP repo with command
yum instal epel-release
Or just download rpm package from the site and install.
RHEL/CentOS 6:
yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
RHEL/CentOS 7:
yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
RHEL/CentOS 8:
yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
When running yum update on CentOS 7 server, i get following error
[root@server2 yum.repos.d]# yum update curl Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Resolving Dependencies --> Running transaction check ---> Package curl.x86_64 0:7.29.0-54.el7 will be updated ---> Package curl.x86_64 0:7.29.0-57.el7_8.1 will be an update --> Processing Dependency: libcurl = 7.29.0-57.el7_8.1 for package: curl-7.29.0-57.el7_8.1.x86_64 --> Running transaction check ---> Package libcurl.x86_64 0:7.29.0-54.el7 will be updated --> Processing Dependency: libcurl = 7.29.0-54.el7 for package: libcurl-devel-7.29.0-54.el7.x86_64 ---> Package libcurl.x86_64 0:7.29.0-57.el7_8.1 will be an update --> Running transaction check ---> Package libcurl-devel.x86_64 0:7.29.0-54.el7 will be updated ---> Package libcurl-devel.x86_64 0:7.29.0-57.el7_8.1 will be an update --> Finished Dependency Resolution Dependencies Resolved ============================================================================================================================================================================================================ Package Arch Version Repository Size ============================================================================================================================================================================================================ Updating: curl x86_64 7.29.0-57.el7_8.1 updates 271 k Updating for dependencies: libcurl x86_64 7.29.0-57.el7_8.1 updates 223 k libcurl-devel x86_64 7.29.0-57.el7_8.1 updates 303 k Transaction Summary ============================================================================================================================================================================================================ Upgrade 1 Package (+2 Dependent packages) Total download size: 796 k Is this ok [y/d/N]: y Downloading packages: No Presto metadata available for updates Error downloading packages: libcurl-7.29.0-57.el7_8.1.x86_64: [Errno 5] [Errno 2] No such file or directory libcurl-devel-7.29.0-57.el7_8.1.x86_64: [Errno 5] [Errno 2] No such file or directory curl-7.29.0-57.el7_8.1.x86_64: [Errno 5] [Errno 2] No such file or directory [root@server2 yum.repos.d]#
Someone had tried to install differnt version of python on this server. That caused this problem.
When i run urlgrabber-ext-down, i get error saying python missing.
[root@server2 ~]# /usr/libexec/urlgrabber-ext-down -bash: /usr/libexec/urlgrabber-ext-down: /usr/bin/python: bad interpreter: No such file or directory [root@server2 ~]#
Problem fixed by creating symlink
ln -s /usr/bin/python2.7 /usr/bin/python
See yum
To install Vagrant on CentOS, go to
https://www.vagrantup.com/downloads
Get link to latest version, then run “rpm -ivh URL_TO_RPM_FILE”.
At time of writing this post, latest Vagrant version is 2.2.9, to install Vagrant 2.2.9, run
rpm -ivh https://releases.hashicorp.com/vagrant/2.2.9/vagrant_2.2.9_x86_64.rpm
To check Vagrant version
vagrant --version
See Vagrant
bind is a DNS server. To install bind on CentOS 7, run
yum install bind bind-utils -y
Enable bind to start on boot
systemctl enable named
Start bind
systemctl start named
You can see status with
systemctl status named
You need to allow DNS ports UDP/TCP 53 in firewall. On CentOS 7, you can run
firewall-cmd --zone=public --permanent --add-service=dns firewall-cmd --reload
By default bind only listens to local IP, to make it accessable from outside, you need to edit named.conf
vi /etc/named.conf
Find
listen-on port 53 { 127.0.0.1; };
listen-on-v6 port 53 { ::1; };
Comment out those two lines by adding # at start of the lines.
#listen-on port 53 { 127.0.0.1; };
#listen-on-v6 port 53 { ::1; };
We need our DNS server access query from anyone on internet. For this, find
allow-query { localhost; };
Replace with
allow-query { any; };
Since we only want our DNS server resolve domains hosted on our server, disable recursion.
Find
recursion yes;
Replace with
recursion no;
Now restart bind with
systemctl restart bind
To server a domain, you need to add the domain to bind. For this edit file
vi /etc/named.conf
at end of the file, add
zone "DOMAIN.EXTN" IN {
type master;
file "/var/named/DOMAIN.EXTN.zone";
allow-update { none; };
};
Now create zone file
vi /var/named/DOMAIN.EXTN.zone
Add following
$TTL 86400 @ IN SOA DOMAIN.EXT. admin.DOMAIN.EXT. ( 100 ; serial 1H ; refresh 1M ; retry 1W ; expiry 1D ) ; minimum @ IN NS ns1.DOMAIN.EXT. @ IN A YOUR_IP_ADDR_HERE ns1 IN A YOUR_IP_ADDR_HERE @ IN MX 10 mail.DOMAIN.EXT. mail IN A YOUR_IP_ADDR_HERE www IN A YOUR_IP_ADDR_HERE
Restart bind
vi /var/named/DOMAIN.EXTN.zone
You can verify domain is resolving with command
nslookup DOMAIN.EXT SERVER_IP_HERE
See bind
To list all packages available on a specific repo, run
yum --disablerepo="*" --enablerepo="REPO_NAME_HERE" list availableYou can get list of all available repos with commandyum repolistExample:
yum --disablerepo="*" --enablerepo="litespeed" list availableThis command list all packages available in repo "litespeed"
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
Remove existing PHP
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
start php-fpm
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
Restart apache
service httpd restart
To verify a package installed on system, you can use
rpm -V PKG_NAMEExample
[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 -VaBack to rpm
On rebooting the CentOS 7 server, changes made to resolv.conf is lost. This is because 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 ~]# To fix, edit
vi /etc/sysconfig/network-scripts/ifcfg-eno1Remove the line
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
[root@server ~]# cat /etc/sysconfig/network-scripts/ifcfg-eno1 | grep DNS
DNS1="1.1.1.1"
DNS2="8.8.8.8"
[root@server ~]# If your network configuration use DHCP, set set PEERDNS=no.
BOOTPROTO=dhcp
PEERDNS=noAnother solution is to make file immutable with
chattr +i /etc/resolv.confRelated Posts
ClamAV is provided by the EPEL repo. Install epel repo
yum install -y epel-release
Install ClamAV with
yum install clamav
Back to ClamAV