How to Mount an Uploaded ISO file in Linux
If you were limited to access /dev/cdrom, you can still utilize the content of an ISO by uploading and mounting it. The syntax is as… Read More »How to Mount an Uploaded ISO file in Linux
Enterprise Linux
How to Install Oracle VM Manager 3.4.2
For simplifying our procedures, I have to assume that you have installed Enterprise Linux 6.7 minimal on the server. The hardware requirements to install OVMM… Read More »How to Install Oracle VM Manager 3.4.2
How Linux Set Date Time Command
Sometimes, you can't use NTP to adjust your server time, you can change it by a command line. [root@rac1 ~]# date -s '2017-02-18 17:30:00' Sat… Read More »How Linux Set Date Time Command
How to Change Initiator Name after Cloning
You may know that you should change hostname and change NIC configurations after cloning a VM, but you may not know there could be iscsi… Read More »How to Change Initiator Name after Cloning
How to Increase Bash History Size
Some valuable or complex commands may not be able to keep in your mind constantly when you need them. In this moment, you can leverage… Read More »How to Increase Bash History Size
How to Resolve RTNETLINK answers: Invalid argument Error adding default gateway
RTNETLINK answers: Invalid argument When I restarted the newly configured network interface, it returned error rtnetlink answers: invalid argument like the following: [root@test ~]# service… Read More »How to Resolve RTNETLINK answers: Invalid argument Error adding default gateway
How to Add a Second IP Address to Current NIC
Let's see current setting of all interfaces.[root@test ~]# ifconfigeth0 Link encap:Ethernet HWaddr 00:0C:29:D8:AE:2D inet addr:10.0.0.152 Bcast:10.0.0.255 Mask:255.255.255.0 … Read More »How to Add a Second IP Address to Current NIC
The Size Limit for Legacy Tar to Accomodate
A quote from wikipedia:Numeric values are encoded in octal numbers using ASCII digits, with leading zeroes. For historical reasons, a final NUL or space character… Read More »The Size Limit for Legacy Tar to Accomodate
How to Change Default Shell to Bash
Some users may ask you to change the default shell to BASH as their used to be. Here are the steps: Check Default Shell Login… Read More »How to Change Default Shell to Bash
How to Shrink XFS File System on Enterprise Linux 7.2
Why XFS File System Cannot be Shrunk Directly? Why cannot we just lvreduce XFS file system? A quote from Red Hat official document talking about… Read More »How to Shrink XFS File System on Enterprise Linux 7.2