network manager changing default 10.42 to custom ip range

Want to configure AP or DHCP server using Network manager but
finding it difficult to get rid of the pre-set 10.42.0.x/24 network ?

Here is how it can be fixed.

Setup a Hostspot or a network from GUI (nm-applet).
the GUI may not give options to set IP address. Dont worry

lets say the name of the connection is bhasker



$ nmcli  c
NAME                    UUID                                  TYPE             DEVICE
bhasker                 8f2a5550-d7c0-48f3-a5e5-e39beee0ed58  802-11-wireless  ap0

$ nmcli  c modify bhasker ipv4.address 172.17.1.1/24

(please note the /24. This is important or else dnsmasq will complain)

$nmcli c up bhasker

thats it ! you now have a DHCP range in 172.17.1.x and an AP !

o10k activation wine

Workaround for MAK keys activation (worked for me) 

From  https://bugs.winehq.org/show_bug.cgi?id=30033

 Found on PlayOnLinux Forums - https://www.playonlinux.com/en/topic-4452-2.html - Try following 

these instructions... It seems that if you enter the MAK serial number on the 

config.xml and run the installer, it will install and activate the Office 2010 

Standard (and hopefully other versions)

1) Copy the CD content to a folder on your computer
2) There'll be a folder named "Standard.WW" (or ProPlus.WW or whatever your version name)
3) Inside "Standard.WW", there is a file named config.xml
4) Edit config.xml and make sure that it has the following lines (for Standard version):

<Configuration Product="Standard">
    <Display Level="none" CompletionNotice="no" SuppressModal="yes" AcceptEula="yes" /> 
    <PIDKEY Value="XXXXXXXXXXXXXXXXXXXXXXXXX" />
    <Setting Id="AUTO_ACTIVATE" Value="1"/>
</Configuration>

Where XXXXXXXXXXXXXXXXXXXXXXXXX is yours 25 chars serial key without dashes.

5) Save the file and now install it through setup.exe

This should install, verify and activate Office 2010 for you. It worked for me on Debian 

make xinetd work from systemd

How to run xinetd with systemd


Create this file  in /lib/systemd/system and name it as xinetd.service

---------- cut here -----------------
[Unit]
Description=xinetd super daemon
After=syslog.target network.target

[Service]
Type=forking
ExecStart=/usr/sbin/xinetd  -pidfile /var/run/xinetd.pid
StandardOutput=syslog
StandardError=syslog
KillMode=process
PIDFile=/var/run/xinetd.pid


[Install]
WantedBy=multi-user.target
---------- cut here -----------------

Run these commands

systemctl enable xinetd.service

Thats all ! you are ready to go !

Genuine microSD or not ?

Ever wondered how to find out if the memory stick you bought for your device is a genuine Sandisk/Samsung/... ?

Method 1: (easy)

Just install the app SD Insight
After opening the app the app must _NOT_ show INVALID. If it does ... hmmm ... well ... contact the seller to investigate more

Method 2:(difficult)

You need a linux machine.
go to /sys/block/device
search for a file using "find" command called "cid"
cat the file. A bunch of 000 in the front means it may  not be a genuine one.

Usually for Sandisk
The top left most bits must not be '000'.
Example my Sandisk shows

$ cat /sys/class/block/mmcblk0/device/cid


Also found
 https://wiki.linaro.org/WorkingGroups/KernelArchived/Projects/FlashCardSurvey?action=show&redirect=WorkingGroups%2FKernel%2FProjects%2FFlashCardSurvey

This gives a list of CID of manufacturers

Adding SRV records for yandex

Adding SRV records for yandex

Well ... for yandex the website says
Record type: SRV
Name: _xmpp-client._tcp
Priority: 20
Weight 0
Port 5222
Value: domain-xmpp.yandex.net.


Which is in no way matching the records asked by Godaddy.
The way to add this to Godaddy is

From above
Name is the name of your domain: example fred.com  (or just use @)
target is the data given by yandex i.e domain-xmpp.yandex.net
protocol is _tcp
service is _xmpp-client and the port is 5222

Repeat the same for the _xmpp-server record. You are now all set
check what you did is right by going to a SRV record checking tool (google search for "srv record check xmpp")

The information here is for my personal use only and not intended to educate or inform anyone about any procedure or process or configuration method. I cannot be held responsible for _any_ consequence resulting from/after an user reading this blog.

How to update CPU microcode on linux K 3.10+

How to update CPU microcode on linux  K 3.10+

Well ... we all have seen this message

PEBS disabled due to CPU errata, please upgrade microcode

So what is this microcode ? how to update it ?
It is a kind-of intel processor firmware given out by intel time to time.

The latest one now is available as microcode.dat (download it form intel website)

make sure you have these 2 packages with you
1. iucode-tool
2. intel-microcode

In debian these are quite staightforward to install

Now run the tool

$ sudo iucode_tool  -l /lib/firmware/microcode.dat
selected microcodes:
001: sig 0x00000650, pf mask 0x02, 1999-05-25, rev 0x0041, size 2048
002: sig 0x00000650, pf mask 0x08, 1999-05-25, rev 0x0045, size 2048
003: sig 0x00000650, pf mask 0x01, 1999-05-25, rev 0x0040, size 2048
004: sig 0x00000651, pf mask 0x01, 1999-05-25, rev 0x0040, size 2048
005: sig 0x00000652, pf mask 0x04, 1999-05-12, rev 0x002b, size 2048
006: sig 0x00000652, pf mask 0x01, 1999-05-12, rev 0x002a, size 2048
007: sig 0x00000652, pf mask 0x02, 1999-05-17, rev 0x002c, size 2048
008: sig 0x00000653, pf mask 0x01, 1999-06-28, rev 0x0010, size 2048
009: sig 0x00000653, pf mask 0x04, 1999-05-20, rev 0x000b, size 2048
010: sig 0x00000653, pf mask 0x02, 1999-05-18, rev 0x000c, size 2048
011: sig 0x00000653, pf mask 0x08, 1999-05-18, rev 0x000d, size 2048
012: sig 0x00000660, pf mask 0x01, 1999-05-05, rev 0x000a, size 2048
013: sig 0x00000665, pf mask 0x10, 1999-05-05, rev 0x0003, size 2048
014: sig 0x0000066a, pf mask 0x08, 1999-05-05, rev 0x000d, size 2048
015: sig 0x0000066a, pf mask 0x02, 1999-05-05, rev 0x000c, size 2048
016: sig 0x0000066a, pf mask 0x20, 1999-05-05, rev 0x000b, size 2048
017: sig 0x0000066d, pf mask 0x20, 1999-05-05, rev 0x0007, size 2048
018: sig 0x0000066d, pf mask 0x08, 1999-03-12, rev 0x0006, size 2048
019: sig 0x0000066d, pf mask 0x02, 1999-03-12, rev 0x0005, size 2048
020: sig 0x00000671, pf mask 0x04, 1998-08-11, rev 0x0014, size 2048
021: sig 0x00000672, pf mask 0x04, 1999-09-22, rev 0x0038, size 2048
022: sig 0x00000673, pf mask 0x04, 1999-09-10, rev 0x002e, size 2048
023: sig 0x00000681, pf mask 0x08, 1999-09-21, rev 0x000f, size 2048
024: sig 0x00000681, pf mask 0x04, 1999-09-21, rev 0x0010, size 2048
025: sig 0x00000681, pf mask 0x20, 1999-09-21, rev 0x000e, size 2048
026: sig 0x00000681, pf mask 0x01, 1999-09-21, rev 0x000d, size 2048
027: sig 0x00000681, pf mask 0x10, 1999-09-21, rev 0x0011, size 2048
028: sig 0x00000683, pf mask 0x08, 1999-10-15, rev 0x0008, size 2048
029: sig 0x00000683, pf mask 0x20, 1999-10-15, rev 0x0007, size 2048
030: sig 0x00000686, pf mask 0x01, 2000-05-05, rev 0x0007, size 2048
031: sig 0x00000686, pf mask 0x02, 2000-05-04, rev 0x000a, size 2048
032: sig 0x00000686, pf mask 0x04, 2000-05-04, rev 0x0002, size 2048
033: sig 0x00000686, pf mask 0x80, 2000-05-04, rev 0x000c, size 2048
034: sig 0x00000686, pf mask 0x10, 2000-05-05, rev 0x0008, size 2048
035: sig 0x0000068a, pf mask 0x80, 2000-12-07, rev 0x0005, size 2048
036: sig 0x0000068a, pf mask 0x10, 2000-11-02, rev 0x0001, size 2048
037: sig 0x0000068a, pf mask 0x20, 2000-12-07, rev 0x0004, size 2048
038: sig 0x00000695, pf mask 0x20, 2004-11-09, rev 0x0007, size 2048
039: sig 0x00000695, pf mask 0x10, 2004-11-09, rev 0x0007, size 2048
040: sig 0x00000695, pf mask 0x80, 2004-11-09, rev 0x0047, size 2048
041: sig 0x000006a0, pf mask 0x04, 2000-01-10, rev 0x0003, size 2048
042: sig 0x000006a1, pf mask 0x04, 2000-03-06, rev 0x0001, size 2048
043: sig 0x000006b1, pf mask 0x20, 2001-02-20, rev 0x001d, size 2048
044: sig 0x000006b1, pf mask 0x10, 2001-02-15, rev 0x001c, size 2048
045: sig 0x000006b4, pf mask 0x10, 2002-01-10, rev 0x0001, size 2048
046: sig 0x000006b4, pf mask 0x20, 2002-01-11, rev 0x0002, size 2048
047: sig 0x000006d6, pf mask 0x20, 2004-10-17, rev 0x0018, size 2048
048: sig 0x000006e8, pf mask 0x20, 2005-11-15, rev 0x0039, size 4096
049: sig 0x000006ec, pf mask 0x20, 2006-05-01, rev 0x0054, size 4096
050: sig 0x000006ec, pf mask 0x80, 2006-09-12, rev 0x0059, size 4096
051: sig 0x000006f2, pf mask 0x01, 2010-10-02, rev 0x005d, size 4096
052: sig 0x000006f2, pf mask 0x20, 2010-10-02, rev 0x005c, size 4096
053: sig 0x000006f6, pf mask 0x01, 2010-09-30, rev 0x00d0, size 4096
054: sig 0x000006f6, pf mask 0x04, 2010-10-01, rev 0x00d2, size 4096
055: sig 0x000006f6, pf mask 0x20, 2010-10-01, rev 0x00d1, size 4096
056: sig 0x000006f7, pf mask 0x10, 2010-10-02, rev 0x006a, size 4096
057: sig 0x000006f7, pf mask 0x40, 2010-10-02, rev 0x006b, size 4096
058: sig 0x000006fa, pf mask 0x80, 2010-10-02, rev 0x0095, size 4096
059: sig 0x000006fb, pf mask 0x20, 2010-10-03, rev 0x00ba, size 4096
060: sig 0x000006fb, pf mask 0x08, 2010-10-03, rev 0x00bb, size 4096
061: sig 0x000006fb, pf mask 0x80, 2010-10-03, rev 0x00ba, size 4096
062: sig 0x000006fb, pf mask 0x40, 2010-10-03, rev 0x00bc, size 4096
063: sig 0x000006fb, pf mask 0x10, 2010-10-03, rev 0x00ba, size 4096
064: sig 0x000006fb, pf mask 0x01, 2010-10-03, rev 0x00ba, size 4096
065: sig 0x000006fb, pf mask 0x04, 2010-10-03, rev 0x00bc, size 4096
066: sig 0x000006fd, pf mask 0x20, 2010-10-02, rev 0x00a4, size 4096
067: sig 0x000006fd, pf mask 0x01, 2010-10-02, rev 0x00a4, size 4096
068: sig 0x000006fd, pf mask 0x80, 2010-10-02, rev 0x00a4, size 4096
069: sig 0x00000f07, pf mask 0x02, 2000-11-15, rev 0x0008, size 2048
070: sig 0x00000f07, pf mask 0x01, 2002-07-16, rev 0x0012, size 2048
071: sig 0x00000f0a, pf mask 0x02, 2002-08-21, rev 0x0015, size 2048
072: sig 0x00000f0a, pf mask 0x04, 2002-07-16, rev 0x0014, size 2048
073: sig 0x00000f0a, pf mask 0x01, 2002-07-16, rev 0x0013, size 2048
074: sig 0x00000f12, pf mask 0x04, 2003-05-02, rev 0x002e, size 2048
075: sig 0x00000f24, pf mask 0x02, 2003-06-05, rev 0x001f, size 2048
076: sig 0x00000f24, pf mask 0x10, 2003-06-10, rev 0x0021, size 2048
077: sig 0x00000f24, pf mask 0x04, 2003-06-05, rev 0x001e, size 2048
078: sig 0x00000f25, pf mask 0x10, 2004-08-26, rev 0x002c, size 2048
079: sig 0x00000f25, pf mask 0x02, 2004-08-11, rev 0x002a, size 2048
080: sig 0x00000f25, pf mask 0x01, 2004-08-11, rev 0x0029, size 2048
081: sig 0x00000f25, pf mask 0x04, 2004-08-11, rev 0x002b, size 2048
082: sig 0x00000f26, pf mask 0x02, 2004-08-05, rev 0x0010, size 2048
083: sig 0x00000f27, pf mask 0x08, 2003-06-04, rev 0x0039, size 2048
084: sig 0x00000f27, pf mask 0x04, 2003-06-04, rev 0x0037, size 2048
085: sig 0x00000f27, pf mask 0x02, 2003-06-04, rev 0x0038, size 2048
086: sig 0x00000f29, pf mask 0x08, 2004-08-11, rev 0x002f, size 2048
087: sig 0x00000f29, pf mask 0x04, 2004-08-11, rev 0x002e, size 2048
088: sig 0x00000f29, pf mask 0x02, 2004-08-11, rev 0x002d, size 2048
089: sig 0x00000f32, pf mask 0x0d, 2004-05-11, rev 0x000a, size 2048
090: sig 0x00000f33, pf mask 0x0d, 2005-04-21, rev 0x000c, size 2048
091: sig 0x00000f34, pf mask 0x1d, 2005-04-21, rev 0x0017, size 7168
092: sig 0x00000f41, pf mask 0xbd, 2005-04-22, rev 0x0017, size 5120
093: sig 0x00000f41, pf mask 0x02, 2005-04-21, rev 0x0016, size 5120
094: sig 0x00000f43, pf mask 0x9d, 2005-04-21, rev 0x0005, size 2048
095: sig 0x00000f44, pf mask 0x9d, 2005-04-21, rev 0x0006, size 3072
096: sig 0x00000f47, pf mask 0x9d, 2005-04-21, rev 0x0003, size 3072
097: sig 0x00000f48, pf mask 0x5f, 2005-06-30, rev 0x0007, size 3072
098: sig 0x00000f48, pf mask 0x01, 2006-05-08, rev 0x000c, size 3072
099: sig 0x00000f48, pf mask 0x02, 2008-01-15, rev 0x000e, size 3072
100: sig 0x00000f49, pf mask 0xbd, 2005-04-21, rev 0x0003, size 2048
101: sig 0x00000f4a, pf mask 0x5c, 2005-12-14, rev 0x0004, size 2048
102: sig 0x00000f4a, pf mask 0x5d, 2005-06-10, rev 0x0002, size 2048
103: sig 0x00000f62, pf mask 0x04, 2005-12-15, rev 0x000f, size 3072
104: sig 0x00000f64, pf mask 0x01, 2005-12-15, rev 0x0002, size 3072
105: sig 0x00000f64, pf mask 0x34, 2005-12-23, rev 0x0004, size 3072
106: sig 0x00000f65, pf mask 0x01, 2006-04-26, rev 0x0008, size 2048
107: sig 0x00000f68, pf mask 0x22, 2006-07-14, rev 0x0009, size 2048
108: sig 0x00001632, pf mask 0x00, 1998-06-10, rev 0x0002, size 2048
109: sig 0x00010661, pf mask 0x80, 2010-10-04, rev 0x0044, size 4096
110: sig 0x00010661, pf mask 0x02, 2010-10-04, rev 0x0042, size 4096
111: sig 0x00010661, pf mask 0x01, 2010-10-04, rev 0x0043, size 4096
112: sig 0x00010676, pf mask 0x01, 2010-09-29, rev 0x060f, size 4096
113: sig 0x00010676, pf mask 0x80, 2010-09-29, rev 0x060f, size 4096
114: sig 0x00010676, pf mask 0x04, 2010-09-29, rev 0x060f, size 4096
115: sig 0x00010676, pf mask 0x40, 2010-09-29, rev 0x060f, size 4096
116: sig 0x00010676, pf mask 0x10, 2010-09-29, rev 0x060f, size 4096
117: sig 0x00010677, pf mask 0x10, 2010-09-29, rev 0x070a, size 4096
118: sig 0x0001067a, pf mask 0xa0, 2010-09-28, rev 0x0a0b, size 8192
119: sig 0x0001067a, pf mask 0x11, 2010-09-28, rev 0x0a0b, size 8192
120: sig 0x0001067a, pf mask 0x44, 2010-09-28, rev 0x0a0b, size 8192
121: sig 0x000106a4, pf mask 0x03, 2013-06-21, rev 0x0012, size 14336
122: sig 0x000106a5, pf mask 0x03, 2013-06-21, rev 0x0019, size 10240
123: sig 0x000106c2, pf mask 0x01, 2009-04-10, rev 0x0217, size 5120
124: sig 0x000106c2, pf mask 0x04, 2009-04-10, rev 0x0218, size 5120
125: sig 0x000106c2, pf mask 0x08, 2009-04-10, rev 0x0219, size 5120
126: sig 0x000106ca, pf mask 0x04, 2009-08-25, rev 0x0107, size 5120
127: sig 0x000106ca, pf mask 0x01, 2009-08-25, rev 0x0107, size 5120
128: sig 0x000106ca, pf mask 0x10, 2009-08-25, rev 0x0107, size 5120
129: sig 0x000106ca, pf mask 0x08, 2009-08-25, rev 0x0107, size 5120
130: sig 0x000106d1, pf mask 0x08, 2010-09-30, rev 0x0029, size 4096
131: sig 0x000106e4, pf mask 0x09, 2013-07-01, rev 0x0003, size 6144
132: sig 0x000106e5, pf mask 0x13, 2013-08-20, rev 0x0007, size 7168
133: sig 0x00020652, pf mask 0x12, 2013-06-26, rev 0x000e, size 8192
134: sig 0x00020655, pf mask 0x92, 2013-06-28, rev 0x0004, size 3072
135: sig 0x00020661, pf mask 0x01, 2009-10-23, rev 0x0104, size 5120
136: sig 0x00020661, pf mask 0x02, 2011-07-18, rev 0x0105, size 5120
137: sig 0x000206a7, pf mask 0x12, 2013-06-12, rev 0x0029, size 10240
138: sig 0x000206d6, pf mask 0x6d, 2012-05-22, rev 0x0619, size 16384
139: sig 0x000206d7, pf mask 0x6d, 2013-06-17, rev 0x0710, size 17408
140: sig 0x000206f2, pf mask 0x05, 2013-06-18, rev 0x0037, size 13312
141: sig 0x000306a9, pf mask 0x12, 2014-05-29, rev 0x001b, size 12288
142: sig 0x000306c3, pf mask 0x32, 2014-07-03, rev 0x001c, size 21504
143: sig 0x000306d4, pf mask 0xc0, 2014-12-05, rev 0x0018, size 14336
144: sig 0x000306e4, pf mask 0xed, 2014-05-29, rev 0x0428, size 13312
145: sig 0x000306e6, pf mask 0xed, 2013-06-19, rev 0x0600, size 11264
146: sig 0x000306e7, pf mask 0xed, 2014-05-29, rev 0x070d, size 15360
147: sig 0x000306f2, pf mask 0x6f, 2014-09-03, rev 0x0029, size 28672
148: sig 0x00040651, pf mask 0x72, 2014-07-03, rev 0x001c, size 20480
149: sig 0x00040661, pf mask 0x32, 2014-07-03, rev 0x0012, size 23552

That says that there are those microcodes in that package

Run this tool again with these options

 iucode_tool   -K/lib/firmware/intel‐ucode         /lib/firmware/intel‐ucode/*
              /lib/firmware/microcode.dat

This will create a lot of files under /lib/firmware/intel-ucode/...

in my case

 $ ls
06-01-01  06-06-00  06-09-05  06-0f-06  06-1c-02  06-3a-09            0f-01-02  0f-04-03
06-01-02  06-06-05  06-09-06  06-0f-07  06-1c-0a  06-3c-03.initramfs  0f-01-03  0f-04-04
06-01-06  06-06-0a  06-0a-00  06-0f-0a  06-1d-01  06-3d-04            0f-02-02  0f-04-07
06-01-07  06-06-0d  06-0a-01  06-0f-0b  06-1e-04  06-3e-04            0f-02-04  0f-04-08
06-01-09  06-07-01  06-0a-04  06-0f-0d  06-1e-05  06-3e-06            0f-02-05  0f-04-09
06-03-02  06-07-02  06-0b-01  06-16-01  06-25-02  06-3e-07            0f-02-06  0f-04-0a
06-03-03  06-07-03  06-0b-04  06-17-06  06-25-05  06-3f-02.initramfs  0f-02-07  0f-06-02
06-03-04  06-08-00  06-0d-06  06-17-07  06-26-01  06-45-01.initramfs  0f-02-09  0f-06-04
06-05-00  06-08-01  06-0d-08  06-17-0a  06-2a-07  06-46-01.initramfs  0f-03-02  0f-06-05
06-05-01  06-08-03  06-0e-08  06-1a-04  06-2d-06  0f-00-07            0f-03-03  0f-06-08
06-05-02  06-08-06  06-0e-0c  06-1a-05  06-2d-07  0f-00-0a            0f-03-04
06-05-03  06-08-0a  06-0f-02  06-1c-01  06-2f-02  0f-01-01            0f-04-01


Now

in that directory /lib/firmware/intel-ucode
(as root shell) type this

for f in *
do
cat $f > /dev/cpu/microcode
done


dmesg will now show something like this

[  205.415532] microcode: CPU0 sig=0x206a7, pf=0x10, revision=0x1b
[  205.416330] microcode: CPU0 updated to revision 0x29, date = 2013-06-12
[  205.416584] microcode: CPU1 sig=0x206a7, pf=0x10, revision=0x1b
[  205.417341] microcode: CPU1 updated to revision 0x29, date = 2013-06-12
[  205.417735] microcode: CPU2 sig=0x206a7, pf=0x10, revision=0x1b
[  205.418509] microcode: CPU2 updated to revision 0x29, date = 2013-06-12
[  205.418931] microcode: CPU3 sig=0x206a7, pf=0x10, revision=0x1b
[  205.419949] microcode: CPU3 updated to revision 0x29, date = 2013-06-12
[  205.420648] microcode: CPU4 sig=0x206a7, pf=0x10, revision=0x1b
[  205.421543] microcode: CPU4 updated to revision 0x29, date = 2013-06-12
[  205.422119] microcode: CPU5 sig=0x206a7, pf=0x10, revision=0x1b
[  205.423232] microcode: CPU5 updated to revision 0x29, date = 2013-06-12
[  205.423944] microcode: CPU6 sig=0x206a7, pf=0x10, revision=0x1b
[  205.425179] microcode: CPU6 updated to revision 0x29, date = 2013-06-12
[  205.425921] microcode: CPU7 sig=0x206a7, pf=0x10, revision=0x1b
[  205.427138] microcode: CPU7 updated to revision 0x29, date = 2013-06-12
[  205.427939] perf_event_intel: PEBS enabled due to microcode update







whola ! the microcode is updated ! and PEBS enabled.
You can apply microcodes as many times as you want since the ones which are applied will not be reapplied.

How to disable apparmour for local images (qcow2 chained images) in libvirt

How to disable apparmour for local images  (qcow2 chained images) in libvirt

Sometimes it is better to install an OS into a "raw" image and then convert that into qcow2 by moving the image to a different directory  (I call them masterdisks) and then creating qcow2 into the directory where all virtual machine disks are present (I call it RUNDISKS)

Libvirt sometimes complains that it cannot read the backing file "permission denied"
This condition is caused by apparmor.
To fix (get around) this issue below is a quick solution:


Edit the file {prefix}/libvirt/qemu.conf

set the value of

security_driver = "none"


restart libvirt-bin service

enjoy your virtual machines running smoothly