ovm web ui aksaklığı

ovm web ui'den yeni bir host ilave ederken, geçici olarak aksaklıklar sonucu, takılıp kalırsa;

aşağıdaki işlemi yaparak bu sıkıcı durumdan kurtulabiliriz.

su - oracle
touch /tmp/.resyncUI
chmod 666 /tmp/.resyncUI

service ovmm restart

Faydalı bir kitab

Solaris meraklıları için faydalı bir kitabı tanıtayım dedim.

Kitabın ismi; "Oracle Solaris 11, System Virtualization Essentials, Second edition". 
ISBN-13: 978-0-13-431087-9
ISBN-10: 0-13-431087-X

Solaris sanallaştırma ortamları ve çalışma şekli oldukça güzel bir şekilde anlatılmış.

http://www.informit.com/store/oracle-solaris-11-system-virtualization-essentials-9780134310879

Solarise merak edenlerin kesinlike okumasını veya en azında göz atmalarını tavsiye ederim.

T-serisi sparc sunucularda, cdrom image ile kurulum

Günün birinde T serisi sparc sunuculara solaris kurmak zorunda kalırsanız, ilom dan cdromu gostererek kurulum yapabilirsiniz.
Ilomdan cd sürücüyü gösterdikten sonra probe-scsi-all ile aygıtları tarayıp, devalias kumutu verdikten sonra boot rcdrom demek yeterli oluyor.
Tabi sunucu otomatik başlatmaya ayarlanmış olmamalı. Otomatik başlatmaya ayarlandıysa, set /HOST send_break_action=break komutu ile başlatmayı durdurmanız gerekmektedir.

Red Hat tabanlı sistemlerde java ayarlanması

Red Hat veya türevi linux sistemimizde birden çok java sürümünü kullanmak zorunda kalıyorsak, başımız biraz dertte olarabilir. Bu durumda varsayılan javayı kendimiz seçmemiz, kullandığımız uygulamada farklı java sürümüne ihtiyaç duyuyorsak sürüme göre path ve java çevre birimlerini ayarlamamız gerekmektir. Örneğin sistemimizde 3 tane farklı java sürümü olsun;


# ls -lu /usr/java/
total 8
lrwxrwxrwx 1 root root   16 Nis  2 09:57 default -> /usr/java/latest
drwxr-xr-x 9 root root 4096 Nis  2 10:29 jdk1.5.0_85
drwxr-xr-x 7 root root  156 Ara 13 05:17 jdk1.6.0_141
drwxr-xr-x 9 root root 4096 Nis  2 09:57 jdk1.8.0_121
lrwxrwxrwx 1 root root   22 Nis  2 09:57 latest -> /usr/java/jdk1.8.0_121

Bu sürümlerden java 6 varsayılan yapmak istiyoruz. Bunun için;


# alternatives --install /usr/bin/jar jar /usr/java/jdk1.6.0_141/bin/jar 10
# alternatives --install /usr/bin/javac javac /usr/java/jdk1.6.0_141/bin/javac 10
# alternatives --install /usr/bin/java java /usr/java/jdk1.6.0_141/bin/java 10

# alternatives --list
libnssckbi.so.x86_64    auto    /usr/lib64/pkcs11/p11-kit-trust.so
ld    auto    /usr/bin/ld.bfd
mta    auto    /usr/sbin/sendmail.postfix
java    auto    /usr/java/jdk1.6.0_141/bin/java
javac    auto    /usr/java/jdk1.6.0_141/bin/javac
jar    auto    /usr/java/jdk1.6.0_141/bin/jar



# java -version
java version "1.6.0_141"
Java(TM) SE Runtime Environment (build 1.6.0_141-b12)
Java HotSpot(TM) 64-Bit Server VM (build 20.141-b12, mixed mode)



Farklı sürüme ihtiyaç duyduğumuzda, uygulamayı çalıştırmadan PATH, JDK_HOME, JRE_HOME, JAVA_HOME çevre değişkenini ayarlamamız yeterlidir.

örneğin;
export PATH=/usr/java/jdk1.8.0_121/:$PATH
export JAVA_HOME=/usr/java/jdk1.8.0_121/
export JDK_HOME=/usr/java/jdk1.8.0_121/
export JRE_HOME=/usr/java/jdk1.8.0_121/jre


Linux sistemlerinde istediğiniz kadar farklı java sürümlerini kullanabilirsiniz.
Düzgün ayar yaptığınızda sorun çıkmayacaktır.

Çalışan sistemden hardiski çıkartmak

Sistemden bir diski çıkartaçak olduğumuzda, pat diye diski çekip çıkartmak doğru değildir.
Ya sistemi tamemen kapatmalı yada diski devre dışı bırakmak gerekmektedir.
Raid kartı varsa raid kartı programıyla diski devre dışı(offline) çekebiliriz.
Raid kartı yoksa ve normal sata disk kullanıyorsak, diski unmout edip, hdparm ile dönmesi durdurup, bilgisayardan veya sunucudan çıkartabiliriz.

Kısa bir bekleyişin arkasından diskimizi çıkartabiliriz. Sizlerde diskin dönmesinin durduğunu sesinden ve titremesinden anlayabilirsiniz.

-S yerine -y parametresi  kullanarak diski standby durumuna alabiliriz.

mariadb : Plugin 'unix_socket' is not loaded :(ubuntu 16.04)

mysqld_safe --skip-grant-tables &

mysql

use mysql;
update user set authentication_string=PASSWORD("") where User='root';
update user set plugin="mysql_native_password";
flush privileges;
quit;

redhat/oracle linux 5 mysql yüklemek

1.
[root@oel5 ~]# wget --no-check-certificate https://repo.mysql.com//mysql57-community-release-el5-7.noarch.rpm
--2017-02-21 11:16:52--  https://repo.mysql.com//mysql57-community-release-el5-7.noarch.rpm
Resolving repo.mysql.com... 104.122.197.77
Connecting to repo.mysql.com|104.122.197.77|:443... connected.
WARNING: certificate common name `cdn.mysql.com' doesn't match requested host name `repo.mysql.com'.
HTTP request sent, awaiting response... 200 OK
Length: 8392 (8,2K) [application/x-redhat-package-manager]
Saving to: `mysql57-community-release-el5-7.noarch.rpm'

100%[==============================================================================================================================================>] 8.392       --.-K/s   in 0s     

2017-02-21 11:16:52 (965 MB/s) - `mysql57-community-release-el5-7.noarch.rpm' saved [8392/8392]

[root@oel5 ~]#

[root@oel5 ~]# rpm -ivh  mysql57-community-release-el5-7.noarch.rpm
warning: mysql57-community-release-el5-7.noarch.rpm: Header V3 DSA signature: NOKEY, key ID 5072e1f5
Preparing...                ########################################### [100%]
   1:mysql57-community-relea########################################### [100%]
[root@oel5 ~]#

 yum update
[root@oel5 ~]# yum install mysql mysql-server
Loaded plugins: rhnplugin, security
This system is not registered with ULN.
You can use up2date --register to register.
ULN support will be disabled.
Setting up Install Process
Package mysql-server is obsoleted by mysql-community-server, trying to install mysql-community-server-5.7.17-1.el5.x86_64 instead
Resolving Dependencies
--> Running transaction check
---> Package mysql.i686 0:5.7.17-1.el5 set to be updated
--> Processing Dependency: mysql-community-libs-compat >= 5.7.9 for package: mysql
--> Processing Dependency: mysql-community-libs >= 5.7.9 for package: mysql
--> Processing Dependency: mysql-community-client >= 5.7.9 for package: mysql
---> Package mysql.x86_64 0:5.7.17-1.el5 set to be updated
---> Package mysql-community-server.x86_64 0:5.7.17-1.el5 set to be updated
--> Processing Dependency: mysql-community-common = 5.7.17-1.el5 for package: mysql-community-server
--> Running transaction check
---> Package mysql-community-client.x86_64 0:5.7.17-1.el5 set to be updated
---> Package mysql-community-common.x86_64 0:5.7.17-1.el5 set to be updated
---> Package mysql-community-libs.x86_64 0:5.7.17-1.el5 set to be updated
---> Package mysql-community-libs-compat.x86_64 0:5.7.17-1.el5 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================================================================================================
 Package                                                Arch                              Version                                    Repository                                    Size
========================================================================================================================================================================================
Installing:
 mysql                                                  i686                              5.7.17-1.el5                               mysql57-community                             40 k
 mysql                                                  x86_64                            5.7.17-1.el5                               mysql57-community                             40 k
 mysql-community-server                                 x86_64                            5.7.17-1.el5                               mysql57-community                            227 M
Installing for dependencies:
 mysql-community-client                                 x86_64                            5.7.17-1.el5                               mysql57-community                             31 M
 mysql-community-common                                 x86_64                            5.7.17-1.el5                               mysql57-community                            813 k
 mysql-community-libs                                   x86_64                            5.7.17-1.el5                               mysql57-community                            2.8 M
 mysql-community-libs-compat                            x86_64                            5.7.17-1.el5                               mysql57-community                            2.1 M

Transaction Summary
========================================================================================================================================================================================
Install       7 Package(s)
Upgrade       0 Package(s)

Total download size: 264 M
Is this ok [y/N]: y


[root@oel5 ~]# /etc/init.d/mysqld
[root@oel5 ~]# service mysqld status
mysqld is stopped
[root@oel5 ~]# service mysqld start
Initializing MySQL database:                               [  OK  ]
Installing validate password plugin:                       [  OK  ]
Starting mysqld:                                           [  OK  ]
[root@oel5 ~]# service mysqld status
mysqld (pid  20536) is running...
[root@oel5 ~]#





2.

wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.17-1.el5.x86_64.rpm-bundle.tar



[root@oel5 ~]# ls
anaconda-ks.cfg  Desktop  install.log  install.log.syslog  mysql-5.7.17-1.el5.x86_64.rpm-bundle.tar
[root@oel5 ~]# tar xvf mysql-5.7.17-1.el5.x86_64.rpm-bundle.tar
mysql-community-devel-5.7.17-1.el5.x86_64.rpm
mysql-community-client-5.7.17-1.el5.x86_64.rpm
mysql-community-server-5.7.17-1.el5.x86_64.rpm
mysql-community-libs-compat-5.7.17-1.el5.x86_64.rpm
mysql-5.7.17-1.el5.x86_64.rpm
mysql-community-libs-5.7.17-1.el5.x86_64.rpm
mysql-community-common-5.7.17-1.el5.x86_64.rpm
mysql-community-embedded-devel-5.7.17-1.el5.x86_64.rpm
mysql-community-test-5.7.17-1.el5.x86_64.rpm
mysql-community-embedded-5.7.17-1.el5.x86_64.rpm
[root@oel5 ~]#


[root@oel5 ~]# rpm -ivh  mysql-5.7.17-1.el5.x86_64.rpm mysql-community-libs-* mysql-community-common* mysql-community-client* mysql-community-server-5.7.17-1.el5.x86_64.rpm
warning: mysql-5.7.17-1.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 5072e1f5
Preparing...                ########################################### [100%]
   1:mysql-community-libs   ########################################### [ 17%]
   2:mysql-community-client ########################################### [ 33%]
   3:mysql-community-common ########################################### [ 50%]
   4:mysql-community-libs-co########################################### [ 67%]
   5:mysql                  ########################################### [ 83%]
   6:mysql-community-server ########################################### [100%]
[root@oel5 ~]#


[root@oel5 ~]# /etc/init.d/mysqld
[root@oel5 ~]# service mysqld status
mysqld is stopped
[root@oel5 ~]# service mysqld start
Initializing MySQL database:                               [  OK  ]
Installing validate password plugin:                       [  OK  ]
Starting mysqld:                                           [  OK  ]
[root@oel5 ~]# service mysqld status
mysqld (pid  20536) is running...
[root@oel5 ~]#
[root@oel5 ~]# grep "A temporary password is generated for root@localhost:" /var/log/mysqld.log
2017-02-21T08:07:25.723596Z 1 [Note] A temporary password is generated for root@localhost: NRLRJWgnB5/F
[root@oel5 ~]# mysql -pNRLRJWgnB5/F
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.7.17

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