first – determine the dev of the hard drive – as in /dev/sda /dev/sdb etc Then excute shred -vz -n 3 /dev/XXX where XXX is the identifier of the hard drive Increase 3 to a larger value for higher security … Continue reading →
I changed the port for sshd on my servers to reduce the number of attacks against the sshd server. In the following example, I am changing the port from the default of 22 to 43231 First – backup your sshd_config … Continue reading →
semanage is used in configuring selinux. If it is not installed you need to run yum -y install policycoreutils-python
Continue reading →Centos 7 yum -y install epel-release yum -y groupinstall “GNOME Desktop” yum -y install xrdp xorg-x11-xinit firewall-cmd –permanent –zone=public –add-port=3389/tcp firewall-cmd –reload systemctl start xrdp.service systemctl enable xrdp.service Centos 6 rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm wget -O epel6.key.txt ‘http://keys.gnupg.net:11371/pks/lookup?search=0x0608B895&op=get’ rpm –import epel6.key.txt … Continue reading →
Updated xrdp on a Centos 7 system and xrdp would not start. Error logged in /var/log/messages: Failed at step EXEC spawning /usr/sbin/xrdp: Permission denied Fix: chcon -t bin_t /usr/sbin/xrdp /usr/sbin/xrdp-sesman Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1177202
Continue reading →First install the EPEL-repositories then install the X Window System yum -y install epel-release yum -y groupinstall “X Window system” Install the MATE packages. This will take a few minutes yum -y groupinstall “MATE Desktop” Tell your system to start … Continue reading →
How to migrate a kvm guest from one host to another. On the destination system, permit connections to port 4321/TCP from the source system. For iptables: iptables -I INPUT -m tcp -p tcp –dport 4321 -j ACCEPT For firewalld (Centos … Continue reading →
ifcfg-enp4s0f2 DEVICE=”enp4s0f2″ ONBOOT=yes NETBOOT=no UUID=”5597ebd7-892b-4ca1-8731-81b66c432c72″ BOOTPROTO=none IPADDR=255.255.255.255 NETMASK=255.255.255.255 HWADDR=”00:1e:67:66:a0:81″ TYPE=Ethernet NAME=”enp4s0f2″ ifcfg-enp4s0f2.900 DEVICE=”enp4s0f2.900″ ONBOOT=yes NETBOOT=no BOOTPROTO=none IPADDR=192.168.0.11 NETMASK=255.255.255.0 NAME=”enp4s0f2.900″ VLAN=yes ifcfg-enp4s0f2.902 DEVICE=”enp4s0f2.902″ ONBOOT=yes NETBOOT=no BOOTPROTO=none IPADDR=172.18.0.74 NETMASK=255.255.252.0 NAME=”enp4s0f2.902″ VLAN=yes
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