File systems

Monitoring system processes

File systems

The df command reports the systems’ disk space usage. If you type the command df at a shell prompt, the output looks similar to the following:

Filesystem

1k-blocks

Used

Available

Use%

Mounted on

/dev/hda2

10325716

2902060

6899140

30%

/

/dev/hda1

15554

8656

6095

59%

/boot

/dev/hda3

20722644

2664256

17005732

14%

/home

none

256796

0

256796

0%

/dev/shm

By default, this utility shows the partition size in 1 kilobyte blocks and the amount of used and available disk space in kilobytes. To view the information in megabytes and gigabytes, use the command df -h.

The -hargument stands for human-readable format. The output looks similar to the following:

Filesystem

Size

Used

Avail

Use%

Mounted on

/dev/hda2

9.8G

2.8G

6.5G

30%

/

/dev/hda1

15M

8.5M

5.9M

59%

/boot

/dev/hda3

20G

2.6G

16G

14%

/home

none

251M

0

250M

0%

/dev/shm

Virtual memory

In the list of partitions, there is an entry for /dev/shm. This entry represents the systems’ virtual memory file system.

Space used by files in a directory

The du command displays the estimated amount of space being used by files in a directory. If you type du at a shell prompt, the disk usage for each of the subdirectories will be displayed in a list. The total for the current directory and subdirectories will also be shown as the last line in the list. If you do not want to see the totals for all the subdirectories, use the command du -hsto see only the total for the directory in human-readable format. Use the du --helpcommand to see more options.

42.4. Hardware

You can also use the lspci command to list all PCI devices. Use the command

lspci -vfor detailed information or

lspci -vvfor detailed information plus additional output.

Issue 6 August 2005 25

Page 25
Image 25
Avaya R3.0 manual File systems, Virtual memory, Space used by files in a directory