Scenario: Create partition and Volume Group 60GB size from 100GB disk on new disk using Parted on CentOS
System: CentOS/RHEL 6 or 7
Steps:
Show new disk:
# fdisk -l | grep sd
[root@server ~]# fdisk -l | grep sd
Disk /dev/sda: 64.4 GB, 64424509440 bytes, 125829120 sectors
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 81797119 39848960 8e Linux LVM
Disk /dev/sdb: 107.4 GB, 107374182400 bytes, 209715200 sectors
[root@server ~]#
Scenario:
-Mount Windows Folder Sharing (CIFS) on RHEL 6/CentOS 6.
-Set only Linux user >> user1 that have RWX access.
-Hide sharing credentials from other Linux users.
-Mount permanent at boot.
System: CentOS 6
Steps:
1) Edit /etc/fstab
# vi /etc/fstab
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Scenario:
– Forward certain email recipient to another email address.
– Forward local Unix account email address to another email recipient because in the Postfix server don’t have mailbox.
System:
Postfix on CentOS 7/RHEL 7 (also work on CentOS 6/RHEL 6)
Steps:
– Edit main.cf
# vi /etc/postfix/main.cf
Edit the below parameter.
virtual_alias_domains = example1.com,example2.com
virtual_alias_maps = hash:/etc/postfix/virtual
Scenario: How to display date and time in bash history command on CentOS/RHEL.
By default default history command output didn’t show date and time.
[bachem@centos7ht ~]$ history 1 sudo su 2 su - 3 sudo su 4 su - 5 ulimit -a
Scenario: Configure 4 ethernet into 2 ethernet bond0 and bond1 on RHEL 6/CentOS 6.
System: RHEL 6.9
Steps:
1) Create new file bond0 (Eth0+Eth1) with IP Address = 172.16.10.70
# vi /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
IPADDR=172.16.10.70
NETMASK=255.255.255.0
TYPE=Bond
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=none
USERCTL=no
PEERDNS=yes
IPV6INIT=no