10 key skills for "lazy" Linux Administrators

Article title: "lazy" Linux administrator's 10 key skills. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

After learning these 10 skills, will you become the most powerful Linux in the world? System Administrators are a bit exaggerated throughout the world, but these skills are necessary to work in a large team. Learn about SHH channels, VNC, password recovery, console reconnaissance, and so on. Examples are attached to each technique. You can copy these examples to your system.

Good system administrators are differentiated in terms of efficiency. If an efficient system administrator can complete a task that takes two hours for another person to complete within 10 minutes, he should be rewarded (get more rewards ), because he saves time for the company, and time is money, isn't it?

The skill is to improve management efficiency. Although I do not want to discuss all the skills in this article, I will introduce the 10 basic magic weapons used by "lazy" administrators. These skills can save time-at least more time to play, even if you don't get more rewards for efficiency.

Tip 1: unmount the unresponsive DVD drive

Experience for new users: When you press the Eject button on the server (running the Redmond-based operating system) DVD drive, it will pop up immediately. He then complained that in most Enterprise Linux servers, if a process is run in that directory, the pop-up will not happen. As a long-term Linux administrator, I will restart the machine. If I don't know what is running and why the DVD drive is not released, I will pop up the disk. However, this is very inefficient.

The following describes how to find the process of keeping the DVD drive and easily pop up the DVD drive: First simulate it. Put the disk in the DVD drive, open a terminal, and load the DVD drive:

# Mount/media/cdrom
# Cd/media/cdrom
# While [1]; do echo "All your drives are belong to us! "; Sleep 30; done

Now open the second terminal and try to bring up the DVD drive:

# Eject

The following message is displayed:

Umount:/media/cdrom: device is busy

Before releasing the device, let's find out who is using it.

# Fuser/media/cdrom

The process is running and the disk cannot be popped up. This is actually our error.

Now, if you are the root user, you can terminate the process at will:

# Fuser-k/media/cdrom

Now you can unmount the drive:

# Eject

Fuser is normal.

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