Config ether centos model point to point

Langsung saja config ip address ethernet pada centos mode point to point, dimana teknik ini untuk menghemat ip. Gamblangnya gini.
+ Pada ethernet mikrotik diset ip addressnya 10.10.10.196/32 dan networknya 49.123.123.196
+ Pada ethernet centos diset ip addressnya 49.123.123.196/32 dan networknya 10.10.10.196
*) Ga usah bingung, pokoknya saling tukeran ip.

nano /etc/sysconfig/networking/devices/ifcfg-eth0

# Intel Corporation 82540EM Gigabit Ethernet Controller
DEVICE=eth0
BOOTPROTO=none
HWADDR=9a:99:0f:f5:e3:f9
ONBOOT=yes
TYPE=Ethernet
NETMASK=255.255.255.255
IPADDR=49.123.123.196
SCOPE="peer 10.10.10.196"
GATEWAY=10.10.10.196

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apt-get upgrade pengecualian package tertentu

Pernah kepikiran nggak sobat, saat kita apt-get upgrade menambahkan pengecualian pada package tertentu ?
jadi misal gini nih :

root@zpanel:/home/rahox# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
  base-files bind9 bind9-host bind9utils cpio dnsutils dpkg dpkg-dev git git-man grub-common grub-pc grub-pc-bin grub2-common
  isc-dhcp-client isc-dhcp-common krb5-locales libbind9-80 libc-bin libc-dev-bin libc6 libc6-dev libdns88 libdpkg-perl
  libfreetype6 libgcrypt11 libgd2-xpm libgnutls26 libgssapi-krb5-2 libisc84 libisccc80 libisccfg82 libk5crypto3 libkrb5-3
  libkrb5support0 libldap-2.4-2 liblwres80 libmysqlclient18 libpng12-0 libpq5 libruby1.9.1 libssh2-1 libssl1.0.0 libxapian22
  libxml2 linux-libc-dev locales multiarch-support mysql-client-5.5 mysql-common mysql-server mysql-server-5.5
  mysql-server-core-5.5 openssh-client openssh-server openssl perl perl-base perl-modules ruby1.9.1 ruby1.9.1-dev sudo tzdata
  unzip
64 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 69.1 MB of archives.
After this operation, 1,268 kB of additional disk space will be used.
Do you want to continue [Y/n]

Nah yang saya tandai warna merah itu kepengen dikecualikan atau pengen tidak ikut ter-upgrade saat melakukan apt-get upgrade.
Baiklah, caranya kita mark apt dulu package mana yang hendak kita hold atau kita kecualikan. Langsung aja ketik begini :

root@zpanel:/home/rahox# apt-mark hold openssh-client openssh-server
openssh-client set on hold.
openssh-server set on hold.

Nah abis itu dipastikan saat apt-get upgrade ngga ada lagi package openssh-server yang akan diupgrade. Hasilnya gini sob :

root@zpanel:/home/rahox# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages have been kept back:
  openssh-client openssh-server
The following packages will be upgraded:
  base-files bind9 bind9-host bind9utils cpio dnsutils dpkg dpkg-dev git git-man grub-common grub-pc grub-pc-bin grub2-common
  isc-dhcp-client isc-dhcp-common krb5-locales libbind9-80 libc-bin libc-dev-bin libc6 libc6-dev libdns88 libdpkg-perl
  libfreetype6 libgcrypt11 libgd2-xpm libgnutls26 libgssapi-krb5-2 libisc84 libisccc80 libisccfg82 libk5crypto3 libkrb5-3
  libkrb5support0 libldap-2.4-2 liblwres80 libmysqlclient18 libpng12-0 libpq5 libruby1.9.1 libssh2-1 libssl1.0.0 libxapian22
  libxml2 linux-libc-dev locales multiarch-support mysql-client-5.5 mysql-common mysql-server mysql-server-5.5
  mysql-server-core-5.5 openssl perl perl-base perl-modules ruby1.9.1 ruby1.9.1-dev sudo tzdata unzip
62 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
Need to get 67.8 MB of archives.
After this operation, 1,107 kB of additional disk space will be used.
Do you want to continue [Y/n]

Untuk menghapus mark tinggal unhold aja

root@zpanel:/home/rahox# apt-mark unhold openssh-client openssh-server
Canceled hold on openssh-client.
Canceled hold on openssh-server.

Semoga bermanfaat.

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