remove  character on centos

https://www.centos.org/modules/newbb/viewtopic.php?viewmode=flat&order=DESC&topic_id=1761&forum=27

1. verify: echo $LANG

2. export LANG="en_US"

done!

UPDATE: to permanently set language each time for each time logi you can edit profile and add new line

 vi .bash_profile  

 press i  
 go to last line and create new line  
 paste this code  

 export LANG="en_US"  

 press escape, enter :wq  

install ssl on shared ip

http://www.thecpaneladmin.com/installing-ssl-certificate-on-shared-ip/

trying this :)

flip your text upside down

hello.

http://www.revfad.com/flip.html

write your text on original textbox and you can see flipped text on flipped textbox.

cool.

create custom domain on cpanel

http://docs.cpanel.net/twiki/bin/vief/EasyApache3/InsideVHost#Custom_templates_that_will_a_AN1

just store this links for future reference.

httpd.conf location on cpanel

http://forums.cpanel.net/f34/where-httpd-conf-117485.html

it is on /usr/local/apache/conf

also can be viewed using this

httpd -V

yum hangs on centos

http://www.graphics-muse.org/wp/?p=162

strace yum update

kill first

http://lists.centos.org/pipermail/centos/2009-July/078865.html

kill -9

futex(0x2b1fa0c7a11c, FUTEX_WAIT, 1, NULL

the solution is..

cd /var/lib/rpm
/usr/lib/rpm/rpmdb_recover

troubleshooting csf

i found new command here:

perl /etc/csf/csftest.pl

http://www.webhostingtalk.com/showthread.php?t=850480

not able to login xen console

xenconsole: Could not read tty from store: No such file or directory

as root:

/usr/sbin/xenconsoled

problem solved.

ref: http://wiki.xen.prgmr.com/xenophilia/2008/03/chris-xenconsole-could-not-rea.html

faster than original cpanel

i use nginx as cpanel wrapper.

server {

error_log /var/log/nginx/vhost-error_log warn;

# Use alternative port eg: port 2073

listen _PUBLIC_IP_:2073;

ssl on;

# redirect error page ssl

# this prevent nginx error 400 http://nginx.org/pipermail/nginx/2009-August/014521.html

error_page 497 https://$host$request_uri;

#ssl on; this can be turned off since the above will automatically enable it

ssl_certificate /etc/ssl/certs/domain.pem;

ssl_certificate_key /etc/ssl/private/domain.key;

server_name domain.com www.domain.com;

access_log /usr/local/apache/domlogs/domain.com-bytes_log bytes_log;

access_log /usr/local/apache/domlogs/domain.com combined;

root /home/smartcha/public_html;

location / {

location ~.*\.(3gp|gif|jpg|jpeg|png|ico|wmv|avi|asf|asx|mpg|mpeg|mp4|pls|mp3|mid|wav|swf|flv|html|htm|txt|js|css|exe|zip|tar|rar|gz|tgz|bz2|uha|7z|doc|docx|xls|xlsx|pdf|iso)$ {

expires 7d;

try_files $uri @backend;

#try_files $uri @redirSSL;

}

error_page 405 = @backend;

add_header X-Cache "HIT from Backend";

proxy_pass https://_PUBLIC_IP_:2083;

include proxy.inc;

}

#try n error by apis

#location @redirSSL {

#proxy_connect_timeout 15;

#proxy_redirect off;

#proxy_set_header Host $host;

#proxy_set_header X-Real-IP $remote_addr;

#proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

#proxy_set_header X-Forwarded-Proto https;

#}

location @backend {

internal;

proxy_pass https://_PUBLIC_IP_:2083;

include proxy.inc;

proxy_set_header X-Forwarded-Proto https;

}

location ~ .*\.(php|jsp|cgi|pl|py)?$ {

proxy_pass https://_PUBLIC_IP_:2083;

include proxy.inc;

}

location ~ /\.ht {

deny all;

}

}

now you can access http://domain.com:2073

3 days no blogspot

http://news.netcraft.com/archives/2011/05/13/blogger-maintenance-causes-extended-outage.html

i use gmail to store url for reference.

now back to blogspot. here:

1. i'm not able to start my dedicated server. it is scandisk (e2fck) scanning your disk.

http://www.linuxquestions.org/questions/linux-software-2/e2fsck-is-running-for-3-days-checking-800-gb-ext3-lvm-volume-411715/

after waiting about 15minutes server back online

2. http://shebangme.blogspot.com/2009/12/devsda3-has-gone-188-days-without-being.html

another reference.

glad blogspot come back online. :)

generate crt into pem

openssl x509 -in domain.crt -out domain.der -outform DER openssl x509 -in domain.der -inform DER -out domain.pem -outform PEM

refer: http://kbeezie.com/view/free-ssl-with-nginx/2/

install ssl on cpanel with nginx enabled

http://kbeezie.com/view/free-ssl-with-nginx/3/

how to monitor temperature every hour (CentOS)

today, i will guide how to monitor your server temparature

1. intall mutt

# yum install mutt

2. create monitor_temp.sh

# vi monitor_temp.sh

type i for insert

sensors | grep Core

hddtemp /dev/sda

type esc and :wq

to quit and save the file

type

3. Create report script

# vi report.sh

sh monitor_temp.sh > data.txt

mutt -s "Report: Temperature report" your@email-server.com < ~/data.txt

again, save the file

test the script by typing

# sh report.sh

if this success, check your email.

make this file executables:

#chmod 755 report.sh

4. create cron job to run every 1 hour

#vi /etc/crontab

* 1 * * * /root/scripts/report.sh

Reference:

http://www.cyberciti.biz/tips/sending-mail-with-attachment.html

http://www.cyberciti.biz/faq/howto-linux-get-sensors-information/

http://www.cyberciti.biz/tips/howto-monitor-hard-drive-temperature.html

http://www.centos.org/docs/5/html/Deployment_Guide-en-US/ch-autotasks.html

monitor cpu temparature

try this first:

http://www.cyberciti.biz/faq/howto-linux-get-sensors-information/

and if you do not have any problem (like me!):

refer this guide how to install coretemp module.

http://www.question-defense.com/2010/03/24/lm_sensors-on-cent-os-5-4-how-to-get-and-install-the-coretemp-module

finally:

coretemp-isa-0000

Adapter: ISA adapter

Core 0: +54°C (high = +100°C)

coretemp-isa-0001

Adapter: ISA adapter

Core 1: +49°C (high = +100°C)

In nicer look:

[root@linux lm_sensors-3.3.0]# sensors |grep "Core"

Core 0: +39°C (high = +100°C)

Core 1: +36°C (high = +100°C)

getting ipv6 with APNIC.

i'm sending email to helpdesk@apnic.net requesting ipv6 address.

the reply so far positive. i hope my website have ipv6 without tunnel soon. tunguu... :)

person in charge: Wita Laksono via RT

Good online marketing

Another good example for online marketing is always let user's know your website is always active.

For example.

once every 2 weeks or a month, we just can say hi or greeting to all user registered on your shopping cart system telling that you're happy they register on your website.

you can use,

Subject:

Greetings from Yourwebsite.com

Dear Apis,

We hope you enjoy your stay with us at yourwebsite.com

Thank you.

This is some good example. maybe giving you idea in another creative way. :)

Indonesia Rigeon List

Indonesia Rigeon List (ISO_3166-2)

http://en.wikipedia.org/wiki/ISO_3166-2:ID

update blogger template (soon)

keep links for future reference.

http://www.demo.premiumbloggertemplates.com/2011/05/higher-blogger-template-demo.html

How to: http://www.premiumbloggertemplates.com/2010/02/how-to-uploadinstall-blogger-template.html

nginx pid error (using nginxcp)

pid      /var/run/nginx.pid;

error:

fopen `/var/run/nginx.pid': No such file or directory [ ok ]

reference: http://bugs.alpinelinux.org/issues/559

vi /etc/nginx/nginx.conf

add

pid /var/run/nginx.pid;

between worker process and error log line.

kill previous nginx process

now you can use:

service nginx restart

success!!

alternative ./configure --pid-path=/var/run/nginx.pid

tunnel route problem

http://www.tunnelbroker.net/forums/index.php?topic=1486.0

storing this for future reference.

update: install radvd

yum install radvd -y

http://www.linuxquestions.org/questions/linux-networking-3/how-to-enable-ipv6-forwarding-654322/

sysctl -w net.ipv6.conf.all.forwarding=1

vi /etc/radvd.conf

enable for interface eth0

service radvd start

Starting radvd: [ OK ]

check connection later.

disk cleanup on centos

today i've learn new command

du (disk usage)

use disk usage with -s (summary) and -h (human readable)

http://www.linuxforums.org/forum/mandriva-linux/58742-making-free-space.html

du -sh /*

Good luck! :)

updating from 5.0 lenny to 6.0 squeeze

http://www.howtoforge.com/how-to-upgrade-debian-lenny-debian-5.0-to-squeeze-debian-6.0-on-xen-vps

posted for future reference.

apt-get failed (debian)

http://serverfault.com/questions/163891/apt-get-update-fails-on-debian-etch

updating debian source.list

add another entries:

deb http://archive.debian.org/debian/ etch main contrib

now updating & waiting to see update status. :)

ipv6 attacked

hi,

i received 4 temporary block ipv6 so far :)

csf saved me again.

i am now sage.

Sage: Wikipedia

A "sage" is a wise man, spiritual teacher or stoic philosopher.

Finally:

How to complete?

1. read my previous entries to get clues.

2. go to domain control panel, add new nameserver with ipv6 ip address

3. point your 3rd nameserver to the nameserver created.

done!

final level, sage

post this for future reference:

http://www.tunnelbroker.net/forums/index.php?topic=1428.0

4gb seg fixup on debian

linux02:~# apt-get install libc6-xen

trying this on debian.

Updates:

after install libc6-xen successfully, you need to fire:

echo 'hwcap 0 nosegneg' > /etc/ld.so.conf.d/libc6-xen.conf && ldconfig

Then reboot.. message gone! :)

another debian problems solved.

iptables problem with debian on xen

module-init-tools

the error

stats:/etc/snmp# iptables -L -v
Note: /etc/modules.conf is more recent than /lib/modules/2.6.18-8.1.15.el5xen/modules.dep
modprobe: QM_MODULES: Function not implemented

modprobe: QM_MODULES: Function not implemented

modprobe: Can't locate module ip_tables
iptables v1.3.6: can't initialize iptables table `filter': iptables who? (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.

sh-2.05b# depmod depmod: QM_MODULES: Function not implemented 

Solution

apt-get install module-init-tools

done!

ref: http://forum.lxcenter.org/index.php?t=msg&goto=56813&

install apache on debian

http://techpatterns.com/forums/about390.html

apt-get update
# install mysql first so it's running so apache sees it.
apt-get install mysql-server-5.0
# for basic installs, unless you know why you do otherwise, use this apache
apt-get install apache2-mpm-prefork
# add php5-pgsql if you're going to run postgre
apt-get install libapache2-mod-php5 php5-mysql

And that's it, it will be running.

You may need to issue this command as root to get it started:

:: Code ::

apache2 -k restart

then visit:

:: Code ::

http://localhost/

switched to debian

since centos not able to support ipv6 correctly with ip6tables now i'm using debian. :)

first error:

apt-get update

Failed to fetch blabla.. file not found

Search accross and found:

http://superuser.com/questions/187830/updating-the-url-list-apt-get-uses-in-debian

The file you are looking for is /etc/apt/sources.list.

Chances are your host is using one of the older XEN templates which had bad repo URLs.

Try my list: (Credits to John T)

deb http://security.debian.org/ lenny/updates main contrib non-free deb http://volatile.debian.org/debian-volatile lenny/volatile main contrib non-free  deb http://ftp.us.debian.org/debian/ lenny main deb-src http://ftp.us.debian.org/debian/ lenny main deb-src http://security.debian.org/ lenny/updates main deb-src http://volatile.debian.org/debian-volatile lenny/volatile main

Now updating my packages :)

submit ipv6 whois information

http://www.tunnelbroker.net/forums/index.php?topic=1241.0

command: whois -h whois.arin.net -i 2607:f128:42:c5::2

if you get invalid query, use -i before your ip address.

for asia, whois.apnic.net

........

guru level

now i'm guru level:

How to complete?

read presentation & there is answer there >:)

check dns server for ipv6

netstat -an | grep ':53'

ref: http://www.linuxforums.org/forum/networking/30561-ipv6-bind-dns-server-problem.html

uneble to query whois on centos

[root@local ~]# whois apis17.info

[Querying whois.afilias.info]

[Unable to connect to remote host]

it is firewall blocking your query.

open outgoing port 43 and all done.. :)

update: whois query for IPV6 failed . then you should use debian or disable firewall temporarily (for centos)

Configserver Firewall

Click to enlarge

So far so good.

debug ipv6 connection

tcpdump -n -i eth0 proto 41

source: https://www.centos.org/modules/newbb/viewtopic.php?viewmode=thread&order=ASC&topic_id=22211&forum=40

ipv6 day

http://www.webstershome.co.uk/content/world-ipv6-day

What is World IPv6 day? - It is a trial period where a number of major web sites will provide their content on both IPv4 and IPv6. This is being sponsored by the Internet Society (ISOC) more information is posted on their World IPv6 Day page