How To: 2 Methods To Change TimeZone in Linux

Question: When I installed the Linux OS, I forgot to set the proper timezone. How do I change the timezone on my Linux distribution. I use CentOS (Red Hat Linux). But, can you please explain me how to do this on all Linux distributions with some clear examples.

Answer: Use one of the following methods to change the timezone on your Linux system. One of these methods should work for you depending on the Linux distribution you are using.

How To Extract a Tar Files To a Different Directory on a Linux/Unix-like Systems

want to extract tar file to specific directory called /tmp/data. How can I extract a tar archive to a different directory using tar command on a Linux or Unix-like systems?

You do not need to change the directory using cd command and extract files. Untarring a file can be done using the following syntax:

Syntax

Typical Unix tar syntax:
tar -xf file.name.tar -C /path/to/directory

GNU/tar syntax:
tar xf file.tar -C /path/to/directory

tar xf file.tar --directory /path/to/directory

How do I change the color of my shell prompt under Linux or Unix operating systems?

You can change the color of your shell prompt to impress your friend or to make your own life quite easy while working at the command prompt. BASH shell is the default under Linux and Apple OS X. Your current prompt setting is stored in a shell variable called PS1. There are other variables too, like PS2, PS3 and PS4.

Tutorial details

Bash displays the primary prompt PS1 when it is ready to read a command, and the secondary prompt PS2 when it needs more input to complete a command. Bash allows these prompt strings to be customized by inserting a number of backslash-escaped special characters.

Task: Display current BASH prompt (PS1)

Creat SSL Certificates

Create a your server's original SSL Certificate. If you use your server as a business, it had better buy and use a Formal Certificate from Verisign and so on.

root@www:~# aptitude -y install openssl

root@www:~# cd /etc/ssl/private 

root@www:/etc/ssl/private# openssl genrsa -des3 -out server.key 2048 

Generating RSA private key, 2048 bit long modulus

...................+++

.....+++

e is 65537 (0x10001)

Enter pass phrase for server.key:# set passphrase

Verifying - Enter pass phrase for server.key:# confirm

Proftpd over SSL/TLS - قسمت دوم

 

Enable SSL/TLS on Proftpd.

[1]

Create certificates first. See here.

[2] Configure for SSL/TLS

root@www:~# vi /etc/proftpd/proftpd.conf

# line 138: uncomment

Include /etc/proftpd/tls.conf

root@www:~# vi /etc/proftpd/tls.conf

# line 10,11,12: uncomment

TLSEngine on

TLSLog /var/log/proftpd/tls.log

TLSProtocol SSLv23

# line 27,28: uncomment and specify certificates

TLSRSACertificateFile /etc/ssl/private/server.crt

TLSRSACertificateKeyFile /etc/ssl/private/server.key

root@www:~# /etc/init.d/proftpd restart 

FTP server with virtual users on Debian Lenny - قسمت اول

Had to setup an FTP server at work (yuck), guides I found elsewhere didn't do exactly what I was after, so it took some trial and error to achieve the setup I needed.

Objectives:

• Be able to create multiple virtual users without having to create a shell account for every FTP user
• Individually set permissions for each FTP user
• FTP users should by default be locked inside a chroot
• However, need to be able to provide read/write access outside the chroot on exception basis

I used Proftpd on Debian Lenny to achieve the above.

1. Install proftpd
sudo aptitude install proftpd

Debian Linux: Change Hostname / Computer Name Permanently

How do I change the hostname of a Debian Linux system permanently using the command line tools?

You can use the hostname command to display or set the Debian Linyx system's host name as follows:
$ hostname
Sample outputs:

server1

باگ vsftpd در دبیان

سلام دوستان

من خودمو کشتم تا بتونم روی Debian Wheezy 7.7 سرویس vsftpd رو نصب کنم. نشد که نشد!!!!

حالا چرا؟ میگم:

درواقع نصب شد و به درستی هم کانفیگ شد. حتی با FileZila بهش وصل شدم و به راحتی دیتا جابجا کردم. اما مشکلی که هست اینه که من میخوام هر یوزری که ساخته میشه فقط Home Directory خودشو ببینه در حالی که بخاط یه باگ ریز vsftpd در لینوکس دبیان این امر فعلا ممکن نیست.

البته خود وب سایت دبیان ادعا کرده که این مشکل با آپدیت vsftpd به ورژن 3 بر روی Debian 7.3  قابل حل شدنه که البته من تست نکردم دیگه. حسش نبود.

این هم لینک ادعای دبیان.

فعلا تصمیم گرفتم برم Proftp نصب کنم ببینم چطوره.

حذف کامل پکیج از دبیان

وقتی با استفاده از apt-get و aptiude پکیجی رو نصب میکنیم پاک کردن کاملش با Configuration Files هاش سخت میشه.

ولی با استفاده از دستور زیر میتونیم کامل حذفش کنیم. با تمامی لاگ هاش.

aptiude purge <package name>

ولی من تست کردم نشد!!؟؟

حالا اگه کسی نظری داره آپدیت کنه.

ممنون

HowTo: Find Out My Linux Distribution Name and Version

How do I find out what version of Linux distribution I'm using from the shell (bash) prompt?

You can use any one of the following method to find out your Linux distribution and name:

a] /etc/*-release file.

b] lsb_release command.

c] /proc/version file.