Commands tagged hdparm sorted by votes

Commands tagged hdparm (6)

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Show the 1000*1000 and 1024*1024 size of HDs on system
This is sample output - yours may be different.
1

awk '/d[a-z]+$/{print $4}' /proc/partitions | xargs -i sudo hdparm -I /dev/{} | grep 'device size with M'

rthemocap · 2010-03-02 20:06:03 6
Show the 1000*1000 and 1024*1024 size of HDs on system

I know this sucks in some way but if someone can improve it please be my guest Show Sample Output
This is sample output - yours may be different.
```
        device size with M = 1024*1024:       38166 MBytes
        device size with M = 1000*1000:       40020 MBytes (40 GB)
        device size with M = 1024*1024:       58627 MBytes
        device size with M = 1000*1000:       61475 MBytes (61 GB)
        device size with M = 1024*1024:      238475 MBytes
        device size with M = 1000*1000:      250059 MBytes (250 GB)
```
0

for I in $(awk '/d[a-z]+$/{print $4}' /proc/partitions); do sudo hdparm -I '/dev/'$I; done | grep 'device size with M'

ElAlecs · 2010-03-02 18:56:32 6

Useful to get info about the hard disk detail. Show Sample Output

hdparm --verbose /dev/sda1

yrkharche1 · 2012-05-04 05:58:58 4

Set APM_level for HDD to prevent frequent parking
This is sample output - yours may be different.
0

sudo hdparm -B 200 /dev/sda

13_rom · 2014-10-16 13:01:13 9
Prevent aggressive Hdd spindown in Laptop battery powered

With many distro if a laptop will be running on batteries, the settings of the power management utility try to optimize the performance and behavior to increase battery life. Very often happens that the default settings are too aggressive and cause continuous Hdd spindown with the risk of damage. This command turns hdd power management off.
This is sample output - yours may be different.
0

sudo hdparm -B255 -S0 /dev/sda

Blacksimon · 2015-03-13 21:29:10 11
Detect your computer's harddisk read speed without disk cache speed

Change your drive letter as you wish. Using pv command for speed detect.First of all you must install pv command for usage. http://www.bayner.com/ kerim@bayner.com Show Sample Output
This is sample output - yours may be different.
```
[55.6MB/s]
```
-1

cat /dev/sda | pv -r > /dev/null

kerim · 2011-01-23 22:58:56 6

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Set laptop display brightness

Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Command to rename multiple file in one go

diff current vi buffer edits against original file

Prepend a text to a file.

Using the sed -i (inline), you can replace the beginning of the first line of a file without redirecting the output to a temporary location.

show ALL iptable rules

show your current iptable rules from every available iptable table

Use default value if unassigned

Will use variable value (for variable $my_dir, in this case), an assign a default value if there is none.

Pretty man pages under X

You're a developer - but it doesn't mean you have to slum it! Why not spice up your man page lookups by using a decent PDF viewer. I use 'xpdf' - maybe you prefer acroread, whatever, it's just as fast as plain dull ASCII on today's machines and you can still search for stuff - that's the main reason I use PDF and not PS.

xargs for builtin bash commands

Similar to xargs -i, but works with builtin bash commands (rather than running "bash -c ..." through xargs)

use vi key bindings at the command line

Adding Prefix to File name

Good old bracket expansion :-) For large numbers of files, "rename" will spare you the for-loop, or the find/exec...

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Commands tagged hdparm (6)

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