Category Archives: Linux

Don’t update my resolv.conf

Yesterday my cousin borrow my laptop. Using guess account on my peppermint OS 5 He surf many site without hassle. This morning I got problem with dns. I see many messages around ‘dns probe no internet’ . I guess my cousin doing something with laptop but when I see my dig result i got nothing.

Try cat /etc/resolv.conf I see no nameserver beside 127.0.0.1 which is common . I decide to add more entry :

# cat /etc/resolv.conf

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND — YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.1.1
nameserver 192.168.1.1
nameserver 8.8.8.8
nameserver 8.8.4.4

save the file.

# resolvconf -d IFACE wlan0 --disable-updates

done.

How to Permanently adjust screen brightness in Peppermint OS 5

My Dell laptop that running Peppermint OS 5 getting better each day. It can detect my wifi card and purge old one and that feature brought my brother in after frustrated for days with his Windows.

Another thing that I realize still need some work is brightness level. I must adjust brightness every time I restart my computer.

My current setting

$ cat /sys/class/backlight/acpi_video0/max_brightness
100
$ cat /sys/class/backlight/acpi_video0/actual_brightness
6

Yes, 6 is my preference level.

After look around I got the solution :

sudo add-apt-repository ppa:nrbrtx/sysvinit-backlight
sudo apt-get update
sudo apt-get install sysvinit-backlight

To check current brightness level using this script :

$ sudo service sysvinit-backlight status
status
Current brightness level for acpi_video0 = 6
Current brightness level for intel_backlight = 55

Well, good guess :-)

Permanently save setting :

$ sudo service sysvinit-backlight stop
save
Saving acpi_video0 = 6
Saving intel_backlight = 55

Nice.

Try restart my computer and it work perfectly :-)

Install minimal CentOS 6.6 with latest PHP and Percona Server 5.6

Being FreeBSD user for years make lazy to try something new :-) . CentOS and Ubuntu server are two distros that brought my attention via distrowatch. Today I have time to try latest CentOS 6 release (6.6) in my virtualbox and I love minimal installation and for that reason I choose CentOS 6.6 minimal iso (CentOS-6.6-x86_64-minimal.iso).

For target installation I choose LAMP and try to use latest component (PHP 5.6, MariaDB 10 or Percona server 5.6 and stock Apache (2.2) ).

Lets get start!

1. Install CentOS 6.6

Let default installation till finished.

2. Configure network

Everything located in /etc/sysconfig/network-scripts/ and every lan card installed in server you see using “ip a” command (remove ” sign).

In most case just change these properties :

  • ONBOOT -> yes

  • BOOTPROTO -> static (change to dhcp for dynamic address)

  • IPADDR -> enter ipv4 address

  • NETMASK -> enter subnet mask

  • GATEWAY -> enter ip4 address of your gateway

If you use vps, all these information available from control panel or check your email from provider.

# service network start

To restart network

3. Install basic stuff

# yum install nano bc wget lynx

4. Update yum

# yum update

5. Install Database

For MariaDB

# cd /etc/yum.repos.d/
# nano MariaDB.repo

Enter these lines :

# MariaDB 10.0 CentOS repository list – created 2015-04-14 06:56 UTC
# http://mariadb.org/mariadb/repositories/
[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.0/centos6-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1

save the file.

# yum install MariaDB-server MariaDB-client

For Percona Server

# yum install http://www.percona.com/downloads/percona-release/redhat/0.1-3/percona-release-0.1-3.noarch.rpm

# yum install Percona-Server-client-56 Percona-Server-server-56

6. Install PHP 5.6

# rpm -Uvh https://mirror.webtatic.com/yum/el6/latest.rpm
# yum install php56w php56w-opcache php56w-mysql

7. Configuration

# chkconfig httpd --add
# chkconfig httpd on --level 235
# chkconfig mysql --add
# chkconfig mysql on --level 235

# iptables -I INPUT -p tcp -m tcp --dport 80 -j ACCEPT
# service iptables save

8. Run the service

# service httpd start
# service mysql start

Done. Basic LAMP server is successfully installed.

9. Create phpinfo page

# cd /var/www/html/
# echo "<?php echo phpinfo();?>" > info.php

10. Test

# lynx localhost/info.php

PHP logo

PHP Version 5.6.7

System Linux localhost.localdomain 2.6.32-504.el6.x86_64 #1 SMP Wed Oct 15 04:27:16 UTC 2014 x86_64
Build Date Mar 21 2015 20:29:45
Server API Apache 2.0 Handler
Virtual Directory Support disabled
Configuration File (php.ini) Path /etc
Loaded Configuration File /etc/php.ini
Scan this dir for additional .ini files /etc/php.d
Additional .ini files parsed /etc/php.d/bz2.ini, /etc/php.d/calendar.ini, /etc/php.d/ctype.ini, /etc/php.d/curl.ini, /etc/php.d/exif.ini,
/etc/php.d/fileinfo.ini, /etc/php.d/ftp.ini, /etc/php.d/gettext.ini, /etc/php.d/gmp.ini, /etc/php.d/iconv.ini, /etc/php.d/json.ini, /etc/php.d/mysql.ini,
/etc/php.d/mysqli.ini, /etc/php.d/opcache.ini, /etc/php.d/pdo.ini, /etc/php.d/pdo_mysql.ini, /etc/php.d/pdo_sqlite.ini, /etc/php.d/phar.ini,
/etc/php.d/shmop.ini, /etc/php.d/simplexml.ini, /etc/php.d/sockets.ini, /etc/php.d/sqlite3.ini, /etc/php.d/tokenizer.ini, /etc/php.d/xml.ini,
/etc/php.d/zip.ini
PHP API 20131106
PHP Extension 20131226
Zend Extension 220131226
Zend Extension Build API220131226,NTS
PHP Extension Build API20131226,NTS
Debug Build no
Thread Safety disabled
Zend Signal Handling disabled
Zend Memory Manager enabled
Zend Multibyte Support disabled
IPv6 Support enabled
DTrace Support enabled
Registered PHP Streams https, ftps, compress.zlib, php, file, glob, data, http, ftp, compress.bzip2, phar, zip
Registered Stream Socket Transports tcp, udp, unix, udg, ssl, sslv3, sslv2, tls, tlsv1.0, tlsv1.1, tlsv1.2
Registered Stream Filters zlib.*, string.rot13, string.toupper, string.tolower, string.strip_tags, convert.*, consumed, dechunk, bzip2.*, convert.iconv.*
Zend logo This program makes use of the Zend Scripting Language Engine:
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
with Zend OPcache v7.0.4-dev, Copyright (c) 1999-2015, by Zend Technologies

11. Test Percona Server

# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.23-72.1 Percona Server (GPL), Release 72.1, Revision 0503478

Copyright (c) 2009-2015 Percona LLC and/or its affiliates
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the current input statement.

mysql> show engines;

+——————–+———+—————————————————————————-+————–+——+————+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+——————–+———+—————————————————————————-+————–+——+————+
| InnoDB | DEFAULT | Percona-XtraDB, Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| CSV | YES | CSV storage engine | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL |
+——————–+———+—————————————————————————-+————–+——+————+
9 rows in set (0,00 sec)

mysql>

Reference : (for more tuning Database and Apache setting)

  1. Percona Tools Wizard
  2. MySQL Tuner
  3. ApacheBuddy
  4. MySQL Tuning Primer

Install Latest Corona SDK on Linux Peppermint OS 5

I want to learn create game for my daughter since she like to play game in her Acer Tablet. I don’t know much about programming for mobile phone nor tablet but I’ll learn.

After dig for internet I decide to use Corona SDK but the problem came since I use Peppermint OS 5 that not supported.

I try Wine way and document the process here for my own reference. Might be useful for others.

Wine version

$ wine --version
wine-1.6.2

Checking cmd command from wine

$ wine cmd
Wine CMD Version 5.1.2600 (1.6.2)

Z:\home\alamsyah>c:

C:\>dir
Volume in drive C has no label.
Volume Serial Number is 0000-0000

Directory of C:\

10/02/2015 12:03 <DIR> Program Files
14/01/2015 15:17 <DIR> Program Files (x86)
23/02/2015 15:17 <DIR> server
12/12/2014 20:40 <DIR> users
12/12/2014 20:40 <DIR> windows
0 files 0 bytes
5 directories 411,322,195,968 bytes free
C:\>

Great. Wine working fine.

Corona SDK

Download latest version for Windows

I got corona sdk 2014.2511

corona_sdk_2014.2511

Install it

$ wine start CoronaSDK-2014.2511.msi

I got error message :

fixme:exec:SHELL_execute flags ignored: 0x00000100
fixme:storage:create_storagefile Storage share mode not implemented.
fixme:msi:ITERATE_CreateShortcuts poorly handled shortcut format, advertised shortcut

but I ignore it.

Follow the screen to get corona sdk installed.

Run Corona SDK

Menu -> Programs -> Corona SDK -> Corona Simulator

corona_sdk_simulator

Try to compile (build for Android)

Got error message

corona_sdk_x86

Well, time for JDK.

Java Development Kit

According this docs I need JDK 7

corona_sdk_jdk7_64bit

Install this version also not work.

corona_jdk6_32bit

I skip this JDK problem as I still able to code and see it from simulator.

Well, time for continue learning :-)

Update :

I use ZeroBrane Studio

$ wget -c https://download.zerobrane.com/ZeroBraneStudioEduPack-1.00-linux.sh 

$ chmod +x ZeroBraneStudioEduPack-1.00-linux.sh

$ ./ZeroBraneStudioEduPack-1.00-linux.sh
Verifying archive integrity… All good.
Uncompressing ZeroBraneStudio with EduPack 1.00………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..
Installing ZeroBrane Studio 1.00…
[sudo] password for alamsyah:
Done.

To uninstall ZeroBrane Studio at a later time, run:
zbstudio-uninstall

Fix bad entry of sources list for Peppermint OS 5

Just quick post for myself. Today I need to give sample to my student about apt-get command and while I try it I got this error :

Err http://ppa.launchpad.net trusty/main amd64 Packages
404 Not Found

Err http://ppa.launchpad.net trusty/main i386 Packages
404 Not Found

W: Failed to fetch http://ppa.launchpad.net/openshot.developers/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/openshot.developers/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.

Yes. That error mean the address is not found. Might be the address changed or something else.

As I use Peppemint OS 5. I found that source.list is no longer packed in single file but located in directory.

$ ls -l /etc/apt/sources.list.d/
total 44
-rw-r–r– 1 root root 146 Mar 2 13:27 jerzy-kozera-zeal-ppa-trusty.list
-rw-r–r– 1 root root 172 Mar 2 13:27 maarten-baert-simplescreenrecorder-trusty.list
-rw-r–r– 1 root root 172 Mar 2 13:27 maarten-baert-simplescreenrecorder-trusty.list.save
-rw-r–r– 1 root root 142 Mar 2 13:27 mc3man-trusty-media-trusty.list
-rw-r–r– 1 root root 142 Mar 2 13:27 mc3man-trusty-media-trusty.list.save
-rw-r–r– 1 root root 150 Mar 2 13:27 openshot_developers-ppa-trusty.list
-rw-r–r– 1 root root 150 Mar 2 13:27 openshot_developers-ppa-trusty.list.save
-rw-r–r– 1 root root 144 Mar 2 13:27 peppermint.list
-rw-r–r– 1 root root 144 Mar 2 13:27 peppermint.list.save
-rw-r–r– 1 root root 132 Mar 2 13:27 phalcon-stable-trusty.list
-rw-r–r– 1 root root 132 Mar 2 13:27 phalcon-stable-trusty.list.save

$ cat /etc/apt/sources.list.d/openshot_developers-ppa-trusty.list
deb http://ppa.launchpad.net/openshot.developers/ppa/ubuntu trusty main
# deb-src http://ppa.launchpad.net/openshot.developers/ppa/ubuntu trusty main

Remove the file

$ sudo rm /etc/apt/sources.list.d/openshot_developers-ppa-trusty.*
[sudo] password for alamsyah:

Recheck it
$ ls -l /etc/apt/sources.list.d/
total 36
-rw-r–r– 1 root root 146 Mar 2 13:27 jerzy-kozera-zeal-ppa-trusty.list
-rw-r–r– 1 root root 172 Mar 2 13:27 maarten-baert-simplescreenrecorder-trusty.list
-rw-r–r– 1 root root 172 Mar 2 13:27 maarten-baert-simplescreenrecorder-trusty.list.save
-rw-r–r– 1 root root 142 Mar 2 13:27 mc3man-trusty-media-trusty.list
-rw-r–r– 1 root root 142 Mar 2 13:27 mc3man-trusty-media-trusty.list.save
-rw-r–r– 1 root root 144 Mar 2 13:27 peppermint.list
-rw-r–r– 1 root root 144 Mar 2 13:27 peppermint.list.save
-rw-r–r– 1 root root 132 Mar 2 13:27 phalcon-stable-trusty.list
-rw-r–r– 1 root root 132 Mar 2 13:27 phalcon-stable-trusty.list.save

Re run apt-get

$ sudo apt-get update

this time no error message.

How about openshot ?

Well, I try re add the source :

$ sudo add-apt-repository ppa:openshot.developers/ppa
This PPA contains the current stable version of OpenShot Video Editor.

If you would rather the bleeding-edge version, check out the following URL:
https://launchpad.net/~jonoomph/+archive/openshot-edge
More info: https://launchpad.net/~openshot.developers/+archive/ubuntu/ppa
Press [ENTER] to continue or ctrl-c to cancel adding it

gpg: keyring `/tmp/tmp8sj5wgdh/secring.gpg’ created
gpg: keyring `/tmp/tmp8sj5wgdh/pubring.gpg’ created
gpg: requesting key B9BA26FA from hkp server keyserver.ubuntu.com
gpg: /tmp/tmp8sj5wgdh/trustdb.gpg: trustdb created
gpg: key B9BA26FA: public key “Launchpad OpenShot Development PPA” imported
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
OK

$ sudo apt-get update

……………….

…………………….

Fetched 785 kB in 41s (19,0 kB/s)
W: Failed to fetch http://ppa.launchpad.net/openshot.developers/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/openshot.developers/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.

Well, I think its openshot repository problem. I skip install this :-)