Tutorial Proggraming Free

tutorial - Linux Runlevels explained

Mode	Directory	Description
0	/etc/rc.d/rc0.d	Halt
1	/etc/rc.d/rc1.d	Single-user mode
2	/etc/rc.d/rc2.d	Not used (user-definable)
3	/etc/rc.d/rc3.d	Full multi-user mode (no GUI interface)
4	/etc/rc.d/rc4.d	Not used (user-definable)
5	/etc/rc.d/rc5.d	Full multiuser mode (with GUI interface)
6	/etc/rc.d/rc6.d	Reboot

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source:http://linuxpoison.blogspot.com/2008/02/135781758016077.html

tutorial - Enable Root logins to Telnet and FTP Services

Configure Telnet for root logins

Simply edit the file /etc/securetty and add the following to the end of the file:

pts/0
pts/1
pts/2
pts/3
pts/4
pts/5
pts/6
pts/7
pts/8
pts/9

This will allow up to 10 telnet sessions to the server as root.

Configure FTP for root logins

Edit the files /etc/vsftpd.ftpusers and /etc/vsftpd.user_list and remove the ‘root‘ line from each file.

Make sure that you NEVER configure your production servers for this type of login.

source:http://linuxpoison.blogspot.com/2008/02/135781758010894.html

tutorial - "init: Id "x" respawning too fast: disabled for 5 minutes."

In most distributions this means that the system is booting by default into runlevel 5, which is supposed to respawn (re-start again after it’s been exited) a graphical login via xdm, kdm, gdm, or whatever, and the system can’t locate the program.

However, “Id” can also indicate the absence or misconfiguration of another program, like mingetty, if init tries to respawn itself more than 10 times in 2 minutes.

Id “x” is the number in the leftmost column of the /etc/inittab file:

# Run gettys in standard runlevels
1:2345:respawn:/sbin/mingetty tty1
2:2345:respawn:/sbin/mingetty tty2
3:2345:respawn:/sbin/mingetty tty3
4:2345:respawn:/sbin/mingetty tty4
5:2345:respawn:/sbin/mingetty tty5
6:2345:respawn:/sbin/mingetty tty6

Commenting the offending line out and then fixing the errant program and testing on the command line will allow you to see any error messages that go to standard error output (console) if the errors are not going to the system log file. Uncomment the line and restart init
with “kill -SIGHUP 1″ or “telinit q” to cause init to reinitialize and reread the /etc/inittab file.

Some systems, however, rewrite /etc/inittab when booting. In that case, refer to the init man page, and/or the settings in /etc/sysconfig/init.

Refer to the init and /etc/inittab man pages for detailed information.

source:http://linuxpoison.blogspot.com/2008/02/135781758018415.html

tutorial - After 50,000 visitors, here are some of the statistics – Firefox wins

After getting 50,000 plus visitors to my blog, here are some of the interesting statistics from Google Analytics.

Top 10 Browsers

Top 10 OperatingSystems

Top 10 OS/Browser Combinations

Top 10 Country

Top 10 SearchEngine

tutorial - htaccess Editor: create .htaccess online

.htaccess Editor is a free Web 2.0-like tool that lets you quickly generate .htaccess files for your hosted website. To use, simply select a category on the left, and edit the parameters to your liking on the right. Then observe as .htaccess Editor sticks the proper code in the textbox at the bottom.

When you've set all of your parameters, simply copy/paste the generated text into a file that you call .htaccess and put it in the root folder of your website's files (something like "public_html" if you're using a hosting company) or a subdirectory of that folder. The tool lets you set things like basic authentication, redirects, default pages, error pages (like 404), and access restrictions.

source:http://linuxpoison.blogspot.com/2008/02/13578175801981.html

tutorial - HowTo create and use RAM disks

The following example will create a RAM Disk 1M in size:

# dd if=/dev/zero of=/dev/ram bs=1k count=1000
# mke2fs -m0 /dev/ram 1000
# mkdir /mnt/ram
# mount /dev/ram /mnt/ram

source:http://linuxpoison.blogspot.com/2008/02/135781758015181.html

tutorial - HowTo Add Primary and Secondary DNS server

1) Open file /etc/resolve.conf using any editor
2) Add your Primary and Secondary DNS ip at the end of the file and it should look like this:- (this is just an example, add the ip address provide by your ISP or your Administrator)

search localhost.localdomain
nameserver 192.168.0.1
nameserver 199.5.85.203

3) Save the file and exit

you are done

source:http://linuxpoison.blogspot.com/2008/02/135781758012804.html

tutorial - Block Instant messengers (yahoo, AIM, MSN, etc ..) on your network

Jammer is an instant messenger jammer. Instant messengers are a nuisance in some LAN environments ( a.k.a College Networks ). IJammer is a network daemon that runs on One workstation of a LAN and prevents any IM traffic on that lan.

visit http://sarovar.org/projects/ijammer/

source:http://linuxpoison.blogspot.com/2008/02/13578175804794.html

tutorial - HowTo Manage your iPod in Linux?

YamiPod is a freeware application to efficiently manage your iPod. It can be run directly from your iPod and needs no installation.

The cool thing is that it also has extra features such as rss news and podcast support, remove duplicates, easy notes editor (with multipage support), songs synchronization, playlists export and much more. It has also been translated in 12 languages.

So what's stopping you to be struck with iTunes(except if you always use the Online Store)

source:http://linuxpoison.blogspot.com/2008/02/135781758019871.html

tutorial - How to Backup your Blogger Blog Online for Free?

Yes, you can now Backup your Blog hosted on Blogger for free.

BlogBackupr is an online application that only needs a URL to create the full backing of any blog using feeds. It does not require a lengthy registration but needs your e-mail address so that you have access to a panel where you can see your backups. You can download back the backups in three formats (xml, txt and html), and even restore your blog if you have any problems.

The restoration feature works fine for Wordpress blogs and surprisingly also for blogs on Blogger. Well, I guess the restoration for Blogger is a novelty and is also a unique feature, that I know of that lets you do it automatically.

It's a great tool for blogs that do not provide a system backup / restore themselves.

source:http://linuxpoison.blogspot.com/2008/02/13578175801934.html

tutorial - Allow AOL Instant Messenger through Squid

To proxy AOL Instant Messenger traffic via https with Squid, change the following line in the Squid configuration file (example using Red Hat Linux):

1. vi /etc/squid/squid.conf

2. Change:
acl SSL_ports port 443 563

To:
acl SSL_ports port 443 563 5190

3. Send the Squid process a SIGHUP or use the service command.
/sbin/service squid reload

source:http://linuxpoison.blogspot.com/2008/02/13578175803646.html

tutorial - HowTo set the Hardware Clock

To set the hardware clock, first set the system clock to the correct time then issue this command:

NOTE: you must be root to set the clock. To login as root use the su
command.

/sbin/hwclock --systohc

(NOTE: '--' is two '-')

source:http://linuxpoison.blogspot.com/2008/02/13578175805354.html

tutorial - MythBusters - Switch to a Linux-based OS such as Ubuntu.

Computer operating systems loaded with stuff I don't want and will never use.

In the tech world this phenomenon is known as “software bloat” or “feature bloat.” It's a well-documented problem and a frequent complaint about Windows OSs—Vista in particular. In addition to being buggy, the extra features tend to bog down your system by demanding more processing power and memory. Computer-makers: Don't load up operating systems with features and then make us sweat to figure out how to get rid of the fat.

Most features can be set up as options. Why not start with a computer loaded with basic stuff that works 100 percent of the time? Then, give us the option of adding the bells and whistles. There's another solution available to consumers: Switch to a Linux-based OS such as Ubuntu. Since most Linux OSs are free, there's no business reason to bloat up the system with feature frills.

Source

source:http://linuxpoison.blogspot.com/2008/02/13578175808880.html

tutorial - Matrix Agent Smith Meet KDE

No Linux desktop list is complete without a Matrix desktop! This cool wallpaper is by *timshinn73 from Deviantart. Icons are the the default KDE icon set and the widgets are obviously SuperKaramba. While the gauges are gkrellm .

source:http://linuxpoison.blogspot.com/2008/02/1357817580772.html

Computer operating systems loaded with stuff I don't want and will never use.

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