Coretanium » Linux http://www.coretanium.net tech blah blah Tue, 20 Sep 2011 07:21:49 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 Perl inline replace http://www.coretanium.net/perl-inline-replace http://www.coretanium.net/perl-inline-replace#comments Tue, 20 Sep 2011 07:21:49 +0000 admin http://www.coretanium.net/?p=439 Replacing a string in a bunch of files using perl inline replace:

perl -pi -e ‘s/ORIG/NEW/g’

]]> http://www.coretanium.net/perl-inline-replace/feed 0 S3FS on XenServer 5.6 http://www.coretanium.net/s3fs-on-xenserver-5-6 http://www.coretanium.net/s3fs-on-xenserver-5-6#comments Sun, 07 Aug 2011 12:26:26 +0000 admin http://www.coretanium.net/?p=426 Get s3fs going on xenserver 5.6: 
yum remove fuse fuse*
yum --enablerepo=base install yum-utils
yumdownloader --enablerepo=base e2fsprogs-devel
rpm --nodeps -Uvh e2fsprogs-devel*.rpm
yum install gcc libstdc++-devel gcc-c++ curl curl* curl-devel libxml2 libxml2* libxml2-devel openssl-devel mailcap
cd /usr/local/src
wget --no-check-certificate "https://downloads.sourceforge.net/project/fuse/fuse-2.X/2.8.4/fuse-2.8.4.tar.gz?r=&ts=1312707573&use_mirror=kent"
tar -zxff fuse-2.8.4.tar.gz
cd fuse-2.8.4
./configure --prefix=/usr && make && make install
export PKG_CONFIG_PATH=/usr/lib/pkgconfig:/usr/lib64/pkgconfig/
ldconfig
modprobe fuse
pkg-config --modversion fuse (confirm correct version)
cd ../
wget http://s3fs.googlecode.com/files/s3fs-1.59.tar.gz
tar -zxf s3fs-1.59.tar.gz
cd s3fs-1.59
./configure --prefix=/usr && make && make install
vi /etc/passwd-s3fs (add aws id and secret key in format xxxxx:xxxxx)
mkdir /mnt/s3drive
s3fs bucket /mnt/s3drive

dump all running vms/data to the AWS S3 cloud mount (/mnt/s3drive)
]]> http://www.coretanium.net/s3fs-on-xenserver-5-6/feed 0 PostgreSQL 9.0 on Debian lenny http://www.coretanium.net/postgresql-9-0-on-debian-lenny http://www.coretanium.net/postgresql-9-0-on-debian-lenny#comments Wed, 05 Jan 2011 10:16:17 +0000 admin http://www.coretanium.net/?p=402 /etc/apt/sources.list


deb http://backports.debian.org/debian-backports lenny-backports main
deb http://backports.debian.org/debian-backports lenny-backports-sloppy main

Install from the new target release:


apt-get install -t lenny-backports postgresql-common
apt-get install -t lenny-backports-sloppy postgresql-9.0 postgresql-client-9.0 postgresql-contrib-9.0

http://lists.debian.org/debian-backports-announce/2010/10/msg00000.html

]]> http://www.coretanium.net/postgresql-9-0-on-debian-lenny/feed 0 RHCE http://www.coretanium.net/rhce http://www.coretanium.net/rhce#comments Sun, 19 Dec 2010 21:56:42 +0000 admin http://www.coretanium.net/?p=397 https://www.redhat.com/wapps/training/certification/verify.html?certNumber=805010134456250

]]> http://www.coretanium.net/rhce/feed 0 PostgreSQL Database Import/Export http://www.coretanium.net/postgresql-database-importexport http://www.coretanium.net/postgresql-database-importexport#comments Sun, 19 Dec 2010 21:55:09 +0000 admin http://www.coretanium.net/?p=395 dbname.pgdump Exporting all databases from pgsql: pg_dumpall -o > all_dbs.pgdump psql -e template1 < all_dbs.pgdump]]> Importing a database into pgsql:

cat dbname.pgdump | psql -d db_name

Or

psql -d db_name -f dbname.pgdump

Exporting a database from pgsql:

su – postgres
pg_dump dbname > dbname.pgdump

Exporting all databases from pgsql:

pg_dumpall -o > all_dbs.pgdump
psql -e template1 < all_dbs.pgdump

]]> http://www.coretanium.net/postgresql-database-importexport/feed 0 Linux 64-Bit Kernel Exploit http://www.coretanium.net/linux-64-bit-kernel-exploit http://www.coretanium.net/linux-64-bit-kernel-exploit#comments Wed, 22 Sep 2010 21:25:49 +0000 admin http://www.coretanium.net/?p=380 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-3081

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-3301

Patch all 64-bit kernels

]]> http://www.coretanium.net/linux-64-bit-kernel-exploit/feed 0 Postfix maximum email size http://www.coretanium.net/postfix-maximum-email-size http://www.coretanium.net/postfix-maximum-email-size#comments Thu, 11 Mar 2010 14:23:22 +0000 admin http://www.coretanium.net/?p=360 The default “message_size_limit” is set to 10240000 bytes which is approximately 10MB. To change it, add/modify the message_size_limit line in your main.cf to;

message_size_limit = 20480000

The above is roughly 20MB and is more than enough on a typical server.

]]> http://www.coretanium.net/postfix-maximum-email-size/feed 0 Qmail smtproutes http://www.coretanium.net/qmail-smtproutes http://www.coretanium.net/qmail-smtproutes#comments Thu, 11 Mar 2010 14:19:21 +0000 admin http://www.coretanium.net/?p=358 If you ever need to route mail destined for a certain domain through a smarthost you can edit/create the following file;

/var/qmail/control/smtproutes

The contents is straight forward… to relay mail destined for domain.com through smtp.yourdomain.com add the following;

domain.com:smtp.yourdomain.com

If you want to relay ALL mail through smtp.yourdomain.com add;

:smtp.yourdomain.com

]]> http://www.coretanium.net/qmail-smtproutes/feed 0 Dell OMSA reports No controllers found. http://www.coretanium.net/dell-omsa-reports-no-controllers-found http://www.coretanium.net/dell-omsa-reports-no-controllers-found#comments Tue, 09 Mar 2010 06:42:10 +0000 admin http://www.coretanium.net/dell-omsa-reports-no-controllers-found During a routine scheduled upgrade window I upgraded to the latest Dell OMSA on a range of Dell PowerEdge servers running CentOS. After the upgrade, shell scripts that check the health of disks started reporting that no storage controllers can be found.


# omreport storage pdisk controller=0
Invalid controller value. Read, controller=0
No controllers found.

After some digging through the Dell mailling lists it became apparent that i’m missing the Dell Firmware Tools on my installation. Installing the firmware tools solved the problem.


# yum -y install dell_ft_install

# srvadmin-services.sh restart

Once done, all was fine.

]]> http://www.coretanium.net/dell-omsa-reports-no-controllers-found/feed 0 PowerDNS Multiple MySQL Backends http://www.coretanium.net/powerdns-multiple-mysql-backends http://www.coretanium.net/powerdns-multiple-mysql-backends#comments Sun, 10 Jan 2010 13:14:38 +0000 admin http://www.xnetcore.com/powerdns-multiple-mysql-backends/ http://doc.powerdns.com/modules.html

To launch two backends of the same type, you can assign a name to each launch like this;

launch=gmysql:connection1,gmysql:connection2

gmysql-connection1-host=10.10.10.1
gmysql-connection1-user=pdns
gmysql-connection1-dbname=pdns

gmysql-connection2-host=10.10.10.2
gmysql-connection2-user=pdns
gmysql-connection2-dbname=pdns

]]> http://www.coretanium.net/powerdns-multiple-mysql-backends/feed 0