Optimize Disks in Linux 1.2

What is typically unnecessary on Linux due to its file systems and modern SSD use?

Defragmentation

Where are most Linux disk optimization utilities run from?

The terminal shell prompt

What permissions are usually needed to check storage statistics on Linux?

Standard user (no elevated privileges)

What does the df command do in Linux?

Shows how much disk space is used and available on file systems

What option should be added to df to make the output human-readable?

-h

What key columns are shown in the output of df -h?

Filesystem, Size, Used, Available, Use%, Mounted on

What does /dev/vda5 represent in Linux?

The fifth partition of the first virtual disk device

What command is used to analyze disk usage within a specific directory structure?

du

What option is commonly used with du for easier readability?

-h

What does du -h /home do?

Displays space used by files and directories under /home

Why might du -h / return errors when run as a regular user?

Insufficient permissions to access all directories

How do you run a du command with elevated privileges?

Use sudo, like sudo du -h /

What is the purpose of the fsck command in Linux?

Checks the file system for errors

Why is it important to know the file system type before using fsck?

Running fsck on incompatible file systems (e.g., btrfs) may cause issues

How can you find the file system type of a device?

Use df -T

What must you do before running fsck on a mounted partition?

Unmount the partition using umount

How do you run a file system check on a device with fsck?

Type fsck followed by the device name (e.g., fsck /dev/vdb1)

What does fsck do if it finds errors?

It attempts to fix them and warns if it can't

What three main Linux commands were demonstrated for disk optimization?

df, du, fsck