Author Archives: KsI - Page 5

OS X How to press ALT (for alt-s at mc, etc)

Posted by on February 4, 2013 No comments

alt+s is quich navigation search in MC (Midnight commander) to activate alt press.

control + (alt option)

OS X Make F1-F12 work as functional keys (without Fn)

Posted by on February 4, 2013 No comments

System Preferences -> Hardware -> Keyboard -> “Use the F1-F12 keys to control software features”

How to make BIG partitions in linux

Posted by on January 10, 2013 No comments

Your cannot create partitions larger then 4Tb using fdisk.
Your should use parted and gpt as partition type.
Read more »

Mysql check auto_increment values

Posted by on January 10, 2013 No comments

We get old project, with braindead architecture.
Database structure provides surprises regularly. Yesterday we had a problem with maximum integer value reached at one column.

‘id’ at one table was auto_increment and “INT” not UNSIGNED INT or BIG INT, so after reaching id value 2147483647 application stop working, I change type to UNSIGNED BIGINT.

ALTER TABLE ad_campaigns_rates MODIFY id BIGINT UNSIGNED  not null auto_increment, AUTO_INCREMENT = 2147483648;

Read more »

Squid with simple authentication

Posted by on November 15, 2012 No comments

Typical task:
We order server at India, for development needs. Need to setup web proxy with authentication. Use squid, Luke!

#htpasswd -c  /etc/squid/passwd username
#htpasswd  /etc/squid/passwd

squid.conf

forwarded_for off #don`t show user real IP at HTTP headers
auth_param basic program /usr/lib64/squid/ncsa_auth /etc/squid/passwd
<span class="zbench-more-link"> <a href="https://it.randomthemes.com/2012/11/15/squid-with-simple-authentication/#more-193" class="more-link">Read more &raquo;</a></span>

qmail maillists and Jira messages delivery issues.

Posted by on October 29, 2012 No comments

We had interesting issue with jira and qmail.
No mail comes to mail list group.

Not trivial email routing probles, message for mail list comes to ezmlm, but ezmlm rejects messages with tag 

Precedence: bulk

Read more »

Mysql How to delete all triggers

Posted by on October 29, 2012 5 comments

I`v got an issue from our development team to dump all triggers from prod db and add them to development db.
It`s trivial, except all triggers deletion. Everyone use magic, procedures, etc.

How to dump only triggers:

/usr/bin/mysqldump --single-transaction  --triggers --routines --no-data  --no-create-db --no-create-info
-u backup -pMEGASECUREPASSWORD
-h dbslave1-1.randomthemes.com database_name > /home/backup/mysql/database_name_triggers.sql

How to delete all triggers:

Fastest way (a little bit hindy 🙂 🙂 but working o.k.): Upload trigger names to file, apply regexp, delete

$mysql -e "SELECT trigger_schema, trigger_name from information_schema.triggers" > ./drop_all_triggers.sql

regexps (use vi, Luke):

:%s/\n/;\r/g
:%s/database_name/DROP TRIGGER IF EXISTS database_name/g
:%s/\t/./g
$mysql mydatabase < ./drop_all_triggers.sql

How to check if zabbix agent insstalled at all infrastructure hosts

Posted by on October 2, 2012 No comments

We use LXC containers at PH hosts.
containers named like:
rolename$RoleVersion-$InstanceNumber

For example
at host sXX2
appserver1-1
db1-1
db1-2
zabbix3-1

We need to check, if zabbix agents are installed at all infrastructure. One way – user fabric, Luke, as all 80 level DevOps do, or use ssh as all 40 level DevOps do.
Sorry for a little bit 🙂 “hindi” code 🙂 no review was done 🙂
Read more »

How to install unassigned packages ubuntu/debian

Posted by on October 1, 2012 No comments

We start chef deployment…
Chef deserve additional Huge article, but let`s start:

  echo "deb http://apt.opscode.com/ `lsb_release -cs`-0.10 main" | sudo tee /etc/apt/sources.list.d/opscode.list
  aptitude update
  aptitude -o Aptitude::CmdLine::Ignore-Trust-Violations=true install opscode-keyring
  aptitude -y -o Aptitude::CmdLine::Ignore-Trust-Violations=true install chef

How to add new disk to FreeBSD

Posted by on September 12, 2012 No comments

We currently migrate all our projects to linux, but sometimes old FreeBSD issues occure.
Today I spend a couple of time, removing hotspare disk from LSI Megaraid and adding it to FBSD as additional disk.
We need quick solution to enhance disk space for couple of weeks for migration.
It was possible to skip failover and use disk without RAID.
So, Read more 🙂

Read more »