Short Notes on Linux Administration - Revision history

Admin at 08:19, 21 November 2019

2019-11-21T08:19:43Z

2014-01-03T03:33:23Z

‎Find and Mark Bad Blocks

2014-01-03T01:42:44Z

2012-06-01T20:41:09Z

2012-06-01T20:40:51Z

2011-07-24T00:18:06Z

2011-07-14T11:35:00Z

Created page with "=== Reset Compiz to Default Settings === gconftool-2 --recursive-unset /apps/compiz and restart."

New page

=== Reset Compiz to Default Settings ===

gconftool-2 --recursive-unset /apps/compiz
and restart.

← Older revision		Revision as of 08:19, 21 November 2019
Line 52:		Line 52:
	<pre>$ sudo backblocks -sv /dev/sdXN > ~/bad-blocks-list		<pre>$ sudo backblocks -sv /dev/sdXN > ~/bad-blocks-list
	$ fsck -l ~/bad-blocks-list /dev/sdXN</pre>		$ fsck -l ~/bad-blocks-list /dev/sdXN</pre>
		+
		+	== Using TLP to Optimize Battery Lifetime ==
		+
		+	<pre># check TLP status and system info
		+	$ sudo tlp-stat -s
		+
		+	--- TLP 1.1 --------------------------------------------
		+
		+	+++ System Info
		+	[...]
		+
		+	+++ TLP Status
		+	State = enabled
		+	Last run = 09:13:49, 403 sec(s) ago
		+	Mode = battery
		+	Power source = battery
		+
		+	# get battery information
		+	$ sudo tlp-stat -b
		+
		+	--- TLP 1.1 --------------------------------------------
		+
		+	+++ Battery Status
		+	/sys/class/power_supply/BAT0/manufacturer = CPT-COS
		+	/sys/class/power_supply/BAT0/model_name = L17C4PB0
		+	/sys/class/power_supply/BAT0/cycle_count = (not supported)
		+	/sys/class/power_supply/BAT0/energy_full_design = 45520 [mWh]
		+	/sys/class/power_supply/BAT0/energy_full = 44540 [mWh]
		+	/sys/class/power_supply/BAT0/energy_now = 37370 [mWh]
		+	/sys/class/power_supply/BAT0/power_now = 20057 [mW]
		+	/sys/class/power_supply/BAT0/status = Discharging
		+
		+	Charge = 83.9 [%]
		+	Capacity = 97.8 [%]
		+
		+	# CPU temperature and fan speed
		+	$ sudo tlp-stat -t
		+
		+	# CPU info
		+	$ sudo tlp-stat -p
		+
		+	# warnings
		+	$ sudo tlp-stat -w</pre>

@@ Line 49: / Line 49: @@
 == Find and Mark Bad Blocks ==
-<pre>$ sudo backblocks -sv /dev/sdX > ~/bad-blocks-list
+To test partition <tt>/dev/sdXN</tt> (such as, <tt>/dev/sda1</tt>) for bad blocks simply run:
-$ fsck -l ~/bad-blocks-list /dev/sdX</pre>
+<pre>$ sudo backblocks -sv /dev/sdXN > ~/bad-blocks-list
-You can run the test also just on a partition, simply by selecting <tt>/dev/sdXN</tt> instead of just drive <tt>/dev/sdX</tt>.
+$ fsck -l ~/bad-blocks-list /dev/sdXN</pre>

← Older revision		Revision as of 01:42, 3 January 2014
Line 46:		Line 46:
	and then feed this file to <tt>sendmail</tt>:		and then feed this file to <tt>sendmail</tt>:
	<pre>sendmail -t < message_file.txt</pre>		<pre>sendmail -t < message_file.txt</pre>
		+
		+	== Find and Mark Bad Blocks ==
		+
		+	<pre>$ sudo backblocks -sv /dev/sdX > ~/bad-blocks-list
		+	$ fsck -l ~/bad-blocks-list /dev/sdX</pre>
		+	You can run the test also just on a partition, simply by selecting <tt>/dev/sdXN</tt> instead of just drive <tt>/dev/sdX</tt>.

← Older revision		Revision as of 20:40, 1 June 2012
Line 20:		Line 20:

	The advantage of <tt>sendmail</tt> over <tt>mail</tt> is that the ''from'' address need not be a valid email address... well... advantage?		The advantage of <tt>sendmail</tt> over <tt>mail</tt> is that the ''from'' address need not be a valid email address... well... advantage?
		+
		+	== Installing <tt>sendmail</tt> ==
		+
		+	On most systems, <tt>sendmail</tt> comes as a package, and typically gets started during the boot from the <tt>init.d</tt>/<tt>rc.d</tt> scripts.
		+
		+	If you want/need to start <tt>sendmail</tt> manually, or it has died, use
		+	sendmail -bd
		+	or, for debugging purposes
		+	sendmail -bD
		+	that will start <tt>sendmail</tt> daemon, but will keep it in foreground, so you can see its output.
		+
		+	== Sending Emails using <tt>sendmail</tt> ==
		+
		+	The easiest way is to create the message file with all necessary definitions, e.g.
		+	<pre>To: Mr. Recepient <recepient@hosting.com>
		+	Subject: This is a fine example of a subject
		+	Date: 2011-08-15 20:00:00 +0000
		+	From: Mr. Sender <sender@hosting.com>
		+	Content-Type: text/plain; charset=utf-8
		+	Content-Transfer-Encoding: 8bit
		+	Content-Disposition: inline
		+	User-Agent: My email service
		+
		+	The body of the message comes here, after a single blank line...</pre>
		+	and then feed this file to <tt>sendmail</tt>:
		+	<pre>sendmail -t < message_file.txt</pre>

← Older revision		Revision as of 00:18, 24 July 2011
Line 3:		Line 3:
	gconftool-2 --recursive-unset /apps/compiz		gconftool-2 --recursive-unset /apps/compiz
	and restart.		and restart.
		+
		+	=== Enable and Start <tt>sendmail</tt> ===
		+
		+	If you're getting "'''stat=Deferred: Connection refused by [127.0.0.1]'''" log messages from ''sendmail'', try adding the following line to your '''/etc/mail/sendmail.mc''' file:
		+	DAEMON_OPTIONS(`Port=smtp, Addr=127.0.0.1, Name=MTA')
		+	under the "General defines" section.
		+
		+	Also, make sure the <tt>sendmail</tt> daemon is running:
		+	ps aux \| grep sendmail
		+	If not, run it using
		+	sendmail -bd -q1m
		+	where ''-q'' parameter chooses how often the email queue's new messages should be processed (here, every minute).
		+
		+	To test if this all works, use
		+	echo -e "Subject: Hello\nTesting the mailer..." \| sendmail -f test@test.com ''myrealaddress@mail.com''
		+
		+	The advantage of <tt>sendmail</tt> over <tt>mail</tt> is that the ''from'' address need not be a valid email address... well... advantage?

@@ Line 1: / Line 1: @@
-=== Reset Compiz to Default Settings ===
+== Reset Compiz to Default Settings ==
   gconftool-2 --recursive-unset /apps/compiz
 and restart.
-=== Enable and Start <tt>sendmail</tt> ===
+== Enable and Start <tt>sendmail</tt> ==
 If you're getting "'''stat=Deferred: Connection refused by [127.0.0.1]'''" log messages from ''sendmail'', try adding the following line to your '''/etc/mail/sendmail.mc''' file: