mount: cannot remount block device /dev/sda2 read-write, is write-protected

Resolution

dmesg gives the answer, it says:

EXT4-fs (sda2): Filesystem with huge files cannot be mounted RDWR without CONFIG_LBDAF 

You need to compile your kernel with "Support for large (2TB+) block devices and files" enabled (CONFIG_LBDAF option in kernel config).

1. Clean up table - remove unneeded data

2. Manualy extend database

    ALTER DATABASE DATAFILE 'full_path_to_file' RESIZE 500M;

    export ORACLE_SID=XE
    export ORACLE_HOME=/usr/lib/oracle/xe/app/oracle/product/10.2.0/server

and that's all After that you should also make this change permanent by writing those settings to shell initialization file. For Debian it will be /etc/profile (globally) or per user (.bashrc in user directory) I'm really missing /etc/env.d directory from Gentoo distro...

echo "deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen" >> /etc/apt/sources.list
apt-get update
apt-get install mongodb-10gen

Remember that Debian-like systems and default package configuration aren't often security aware so you should edit mongodb config:

vim /etc/mongodb.conf

and add line:

bind_ip 127.0.0.1

This will disable default setting to run mongodb in trusted mode

If you have lm flag (like above) your CPU is at 100% 64 bit

 files = Dir.glob("*") 

Returns all files from the current directory as an Array. You can iterate over every element very easy and use it for custom action.

 Dir.glob('*.jpg') 

 Dir.glob("/var/log/*") 

Lastly I faced problems with installing Ruby 1.9 on Gentoo distros. First I unmasked Ruby 1.9.2 version. I use for that autounmask tool:

 # autounmask =/dev-lang/ruby-1.9.2

But after that I received error on rdoc installation:

 # emerge ruby emerge: there are no ebuilds to satisfy ">=dev-ruby/rdoc-2.5.11[ruby_targets_ruby19]". (dependency required by "dev-lang/ruby-1.9.2" [ebuild]) (dependency required by "ruby" [argument]) 

How to resolve that problem and install Ruby 1.9?

Now you can use free or top to verify that available swap space really increased. Of course the trick above works only until reboot - if you want it to persist, just add (on your Gentoo) server swapon /tmp/swap_file to /etc/conf.d/local.start.

 ps ax|grep named named -d 3 -c /etc/named-master.conf 

If -d flag exists try to restart named without it and check again

 ps ax|grep named named -c /etc/named-master.conf 

And that's all. 

Related links:
Bind documentation

Due to data migration I'm adding  here Derek's comment:

A safer way to do this is the following:

1. delete named.run (can be in /var/named, /var/cache/bind, etc, depending on the flavor of Linux).
2. "rndc notrace" to disable debug in bind
3. "rndc reload" to reopen file handles. 

If you're running bind in production, killing it is not usually an option.

Thanks

 if defined? my_var puts "exists" else puts "doesn't exist" end 

defined? method returns type of variable if variable exists and nil otherwise. Second way is by initializing variable which you want to check ...

 my_var = nil if my_var.nil? #logic goes here else #otherwise end