Stop useing root ssh login
#/etc/ssh/sshd_config
PermitRootLogin no
VirtualBox guest addition
after install centos , update it first
yum update
reboot
then update kernel*
yum update kernel*
reboot
then install devel tool and kernel
yum install gcc kernel-devel kernel-headers dkms make bzip2 perl
then mount guestaddtions iso and install it
mkdir /media/cdrom
mount -r /dev/cdrom /media/cdrom
sh /media/cdrom/VBoxLinuxAdditions.run
done
//manual mount share folder
mount -t vboxsf share_name vm_folder
// mount on boot (remember do not checked auto mount on Virtual Box)
touch /etc/modules-load.d/vboxsf.conf
// append line "vboxsf" to vboxsf.conf
echo "vboxsf" >> /etc/modules-load.d/vboxsf.conf
vi /etc/fstab
share_name /path/to/vm defaults 0 0
Symlinks in VirtualBox
//after setting , restart Virtual machine and virtualbox
ifconfig
Centos default didn't have ifconfig command
we can use "ip addr" instend
or
yum install net-tools
for install ifconfig
service
sudo systemctl start httpd.service
sudo systemctl status httpd.service
sudo systemctl enable httpd.service //on boot
systemctl list-unit-files --type=service
firewall
firewall-cmd --zone=public --add-port=80/tcp --permanent
firewall-cmd --zone=public --add-port=22/tcp --add-source=192.168.1.0/24 --permanent
firewall-cmd --reloadnetwork static
#vi /etc/sysconfig/network-scripts/ifcfg-name
IPADDR=192.168.x.x
NETMAST=255.255.255.0
GATEWAY=192.168.x.1
network dns
$ sudo vi /etc/resolv.conf
nameserver 8.8.8.8
nameserver 8.8.4.4
or
$ sudo vi /etc/sysconfig/network-scripts/ifcfg-name
DNS1=8.8.8.8
php-mcrypt
cd /tmp
wget http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
rpm -Uvh epel-release-7-5.noarch.rpm
yum install php-mcrypt*
alias su command
create a custom.sh shell script in (rember file name have execute order problem)
# /etc/profile.d/custom.sh
alias ll='ls -al'
# /etc/profile.d/custom.sh
alias ll='ls -al'
apache 2.4 Directory new option required
Require all granted
