Your DNS might not cache all the records of internet, but you can forward the query to external DNS for servicing your clients.There're two entries… Read More »How to Make Forwarders of BIND Named Server Work
Let's see the current size of SWAP.[root@test ~]# cat /proc/swapsFilename … Read More »How to Increase SWAP Partition on Linux
Since I found there's no free space in the main volume group for extending other volumes, so I intend to shrink some non-critical volumes to… Read More »How to Reduce Logical Volume Size on Linux
Logical volumes (LV) are controlled by the belonging volume group (VG), so there must have some free space in the VG for LVs to increase.… Read More »How to Increase Logical Volume Size on Linux
When we have space pressure on logical volumes (LV), we will seek for free space (or you may say unused space) in volume groups (VG)… Read More »How to Increase Volume Group Size on Linux
How to Resolve PartProbe Error: "WARNING: the kernel failed to re-read the partition table on /dev/sda"
In general, the newly created partition, i.e. /dev/sda3 in this case does not show in the device directory immediately and automatically.[root@test ~]# ll /dev/sd*brw-rw----. 1… Read More »How to Resolve PartProbe Error: "WARNING: the kernel failed to re-read the partition table on /dev/sda"
Since we are running on CentOS 7.1 Minimal which has no default named service, so we need to install it either by yum install bind… Read More »How to Configure BIND Named Service on Enterprise Linux 7
In some cases, you might want to know UUID of NICs, here is the command to see the information on Enterprise Linux 7.[root@test ~]# nmcli… Read More »How to Know UUID of a Network Interface Card
After you added the second network interface card (NIC) on Enterprise Linux 7, the server can detect the presence of the NIC, but they are… Read More »How to Configure the Second NIC on Enterprise Linux 7 - by Modifying Configuration File