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Category: Ubuntu
- Qmail SMTP Relay
If you have a Qmail server and you want to allow a specific IP to send emails (relay) through Qmail all you have to do is to add in /etc/tcprules.d/tcp.smtp :
IP:allow,RELAYCLIENT=”",RBLSMTPD=”",NOP0FCHECK=”0″,DKSIGN=”/var/qmail/control/domainkeys/domain.com/dkim1″
Where IP is the IP of your remote email server. You can even specify something like : aaa.bbb.ccc.:allow,RELAYCLIENT=”"
After this you have to run :
tcprules /etc/tcprules.d/tcp.smtp.cdb /etc/tcprules.d/tcp.smtp.tmp < /etc/tcprules.d/tcp.smtp
- Nginx + php 5.2.17 + php-fpm
Download the needed packages and store them in /usr/src:
http://us.php.net/distributions/php-5.2.17.tar.gz
http://php-fpm.org/downloads/php-5.2.17-fpm-0.5.14.diff.gz
http://nginx.org/download/nginx-1.1.0.tar.gz
Then run :
tar -xvzf php-5.2.17.tar.gz
gzip -cd php-5.2.17-fpm-0.5.14.diff.gz | sudo patch -d php-5.2.17 -p1
cd php-5.2.17
./configure --enable-fastcgi --enable-fpm --with-mcrypt --with-zlib --enable-mbstring --enable-pdo --with-curl --disable-debug --with-pic --disable-rpath --enable-inline-optimization --with-bz2 --enable-xml --with-zlib --enable-sockets --enable-sysvsem --enable-sysvshm --enable-pcntl --enable-mbregex --with-mhash --with-xsl --enable-zip --with-pcre-regex --with-gd --without-pdo-sqlite --with-pdo-mysql --without-sqlite --with-jpeg-dir=/usr/lib --with-png-dir=/usr/lib --with-mysql --enable-bcmath --enable-calendar --enable-exif --enable-ftp --with-gettext --with-imap --with-mysqli --with-openssl --with-kerberos --with-imap-ssl --enable-dbase --with-gmp --enable-shmop --enable-wddxmake all install
Note that you can add –prefix to install the binaries in a different location than the default one.
After compilation is done :
strip /usr/local/bin/php-cgi
cp sapi/cgi/fpm/php-fpm /etc/init.d/
chmod +x /etc/init.d/php-fpmcp /usr/src/php-5.2.17/php.ini-recommended /usr/local/lib/php.ini
mkdir /etc/php/
ln -s /usr/local/lib/php.ini /etc/php/php.ini
ln -s /usr/local/etc/php-fpm.conf /etc/php/php-fpm.conf
Make sure you edit /etc/php/php-fpm.conf and set the proper user/group (and permissions if its the case).
Then compile Nginx:
tar zxvf nginx-1.1.0.tar.gz
./configure --sbin-path=/usr/local/sbin --with-http_ssl_module --without-mail_pop3_module --without-mail_imap_module --without-mail_smtp_module --with-http_stub_status_module
make && sudo make install
The same you can modify the –prefix here.
- Puppet howto Ubuntu
I’m using 2 Ubuntu Lucid 10.10 for this setup.
On the server run:
apt-get install puppetmaster
At the time I’m writing this in the repos version 2.6.1 is available.
On the client run :
apt-get install puppet
Note that /etc/hosts needs to contain the IP and host of both client and server, e.g:
10.0.0.30 depot.server.org depot
10.0.0.31 n1.server.org n1
Create a default manifest file (/etc/puppet/manifests/site.pp) and put in it :
class test_class {
file { "/tmp/test":
ensure => present,
mode => 644,
owner => root,
group => root
}
}# tell puppet on which client to run the class
node n1 {
include test_class
}
Then on the server run :
/etc/init.d/puppetmaster start
and on client :
puppetd –server depot.server.org –waitforcert 60 –test
After this you should see on the server a new host when running :
puppetca –list
In order to sign this host on the server side you need to run :
puppetca –sign n1.server.org
After this on the client side /tmp/test should be created.
- Update ubuntu
To upgrade from Lucid 10.10 to Natty Narwhal 11.04 you only have to run :
do-release-upgrade -d
- Authentication Token Manipulation Error
You may get an error, such as Authentication Token Manipulation Error, while trying to change passwords for a user. For example:
#passwd user
Authentication Token Manipulation Error
#This error is being produced because you are using shadowed password files and the shadow doesn’t have entry for this user. i.e, passwd file has an entry for this user, but shadow file doesn’t.
In order to resolve this, you can either add the entry manually or recreate the shadow file. You can use pwconv to recreate the shadow file. See the manpage for more details on this.
- How to enable Status in apache
Add this to your httpd.conf file:
ExtendedStatus On
<Location /server-status>
SetHandler server-status
Order Deny,Allow
Deny from all
Allow from 127.0.0.1
</Location> - How to clear SWAP
It happens for swap to be used from time to time :
root@servcorp:~# free -m
total used free shared buffers cached
Mem: 4011 759 3252 0 4 53
-/+ buffers/cache: 702 3309
Swap: 8191 15 8176To clear the swap run :
root@servcorp:~# swapoff -a && swapon -a
And free shows :
root@servcorp:~# free -m
total used free shared buffers cached
Mem: 4011 746 3265 0 4 55
-/+ buffers/cache: 686 3325
Swap: 8191 0 8191