How to use ftp in a shell script

Submitted by sandip on Wed, 08/24/2011 - 15:08
(via www.stratigery.com)

Sometimes I want to FTP a file from one machine to another. Usually, I can do the transfer interactively, but every so often, I would like to have a shell script do the file transfer. This task has eluded me in the past, but I finally figured it out. I've not seen this particular trick documented in the past, so I submit it for your approval...

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Install python-2.7 and fabric on CentOS-5.6

Submitted by sandip on Fri, 08/05/2011 - 11:57

Install the required packages first:

# yum install gcc gcc-c++.x86_64 compat-gcc-34-c++.x86_64 openssl-devel.x86_64 zlib*.x86_64

Download and install python-2.7 from source:

$ wget http://www.python.org/ftp/python/2.7.2/Python-2.7.2.tgz
$ tar -xvzf Python-2.7.2.tgz
$ cd Python-2.7.2
$ ./configure --with-threads --enable-shared
$ make
# make install

Link the shared library:

# echo "/usr/local/lib" >>/etc/ld.so.conf.d/local-lib.conf
# ldconfig

Verify with:

$ which python
$ python -V

Install easy_install:

$ wget http://peak.telecommunity.com/dist/ez_setup.py
# python ez_setup.py

Install fabric via easy_install:

easy_install fabric

To get the location of site-packages for current version of python:

$ python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()"

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GPG Quick Start

Submitted by sandip on Fri, 07/22/2011 - 13:29
(via www.madboa.com)

A quick gpg HOWTO for getting started with GnuPG.

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Delete trac tickets

Submitted by sandip on Thu, 07/21/2011 - 15:41

To delete trac tickets without installing extra plugins, here's the SQL.

Note: make sure to create a backup of trac.db first.

$ sqlite3 trac.db
delete from ticket_change where ticket = <TicketID>;
delete from ticket_custom where ticket = <TicketID>;
delete from ticket where id = <TicketID>;

Replace "TicketID" with the ID of ticket that needs to be deleted.

To purge out all tickets, use the same sql without the where clause.

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RBLSMTPD with SYSLOG

Submitted by sandip on Thu, 07/21/2011 - 10:03
(via www.tjsi.com)

This modified rblsmtpd features parameter-enabled syslog-based RBL server and source-IP logging.

Review the FAQ for the compile, install and testing...

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auotmount shares for vzyum updates

Submitted by sandip on Mon, 06/13/2011 - 10:08

Note: The directions at "http://wiki.openvz.org/Install_OpenVZ_on_a_x86_64_system_Centos-Fedora#STEP_12" did not quite work for me as ".gpgkeyschecked.yum" gets created in the yum-cache directory as well and is not available to the containers. The workaround below worked for me.

To share the vzyum cache directory between various containers. Edit "/etc/auto.master" to include the following:

/vz/root/{vpsid}/var/cache/yum-cache /etc/auto.vzyum

Include one line for each installed or planned VPS, replacing {vpsid} with the adequate value.

Then, create "/etc/auto.vzyum" file with only this line:

share -bind,ro,nosuid,nodev :/var/cache/yum-cache/share

Restart the automounter daemon.

Edit "/vz/template/centos/5/x86_64/config/yum.conf" and change cachedir location:

cachedir=/var/cache/yum-cache/share

Create the corresponding cachedir:

mkdir /var/cache/yum-cache/share

Test with:

vzyum {vpsid} clean all

This should create all of the yum cache directory at "/var/cache/yum-cache/share" location and should be available to the openvz container via bind mount.

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chroot ftp user outside plesk

Submitted by sandip on Fri, 06/03/2011 - 15:49

To chroot ftp user outside of plesk, add the user belonging to psacln group.

usemod -g psacln <username>

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DirectAdmin user and password

Submitted by sandip on Wed, 06/01/2011 - 16:40

I've had to test some connectivity issues with pop and imap clients without having access to their account info.

"/etc/virtual/{domain.tld}/passwd" file holds their user and md5 password hash. Make sure to backup this file first.

Generate a new md5-based password hash:

openssl passwd -1

Edit "/etc/virtual/{domain.tld}/passwd" file replacing the password hash with the above.

Test login to mail.

Once debugging is finished, restore the file back.

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The Guide to IP Layer Network Administration with Linux

Submitted by sandip on Wed, 05/25/2011 - 09:36
(via linux-ip.net)

The Guide to IP Layer Network Administration with Linux was conceived as a project to document and provide examples for the use of Linux-specific IP networking tools.

The book includes coverage of the following topics: network address translation (NAT), address resolution protocol (ARP), routing, and masquerading. There is a nascent section on bridging, although the focus of the documentation is the use of layer 3 Linux technologies.

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Check bots success POSTs in apache access log

Submitted by sandip on Thu, 05/19/2011 - 16:20

Here is a one liner to check for IPs of bots that are misusing your site.

$ awk '$6 ~ /POST/ && $9 ~ /200/ {print $1 " " $7}' /var/log/httpd/access_log | sort | uniq -c | sort -n | tail

This will give you the top 10 IPs and URIs with a hit count.

Consider blocking those rogue IPs with a high hit count via iptables.

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