Anti HostMonster » ssh

MySQL: Repair & Optimize all Tables in all Databases

hismis — Mon, 12 Sep 2011 21:16:43 +0000

MySQL tables can crash quite easily, especially when your server unexpectedly shuts down or crashed, or when you're forced to copy data around when it's still being accessed.

Luckily, there's a simple command to automatically check, repair and optimize all tables in all databases when you're running a MySQL server on Linux / Unix / BSD.

mysqlcheck -u root -p --auto-repair --check --optimize --all-databases

That's all there is to it!

Best Webhost

admin — Thu, 01 Sep 2011 20:46:33 +0000

Our Recomended Webhost for the month:

DreamHost

With our promo take 50 USD OFF using promotional code: GIVE50GIFT

That gives you a One Year webhost for only 69.4USD

Please share you opinions if you think otherwise.

Below is a table comparing popular webhosts and any hidden limtations they have. If you have updates to this please comment.

Feature	Dreamhost	Hostmonster	GoDaddy (Delux)
Price/Month	$9.95	$6.95	$6.99
Price Promo 1yr	$119.4-50=$69.4	Adhoc 5.95$x12=$71.4	$6.64×12=$79.68
Host Unlmited Domains	Yes	Yes	Yes
Hosting Space	Unlimited	"Unlimited" but if high your account will be suspended	150GB
Bandwidth	Unlimited	Unlimited	1500GB
SSH Access	By Default	Need to send ID	Can be requested no ID needed
CPU Limit	No Limitation	60Sec then Site suspended	No Limitation
Uptime	99.9	99.9	99.9
MYSQL Databases	Unlimited	100	25
Email Accounts	Unlimited	Unlimited	Unlimited
First Yr Domain Registration Free	Yes	Yes	No
Custom Cronjob	Yes	Yes	Yes
Tech Support	Chat, Email Ticket system(response time: 1-24hours),Phone: only call back	Phone, Chat, Ticket(Response time 1-24 Hours)	Phone,Ticket(slow 1 Day response time)
Install Custom PHP	Yes Simple see article here	No	No
FFMPEG	Yes	No	No
Max File Upload Size	7MB, unlimited with Custom PHP install	2MB, can be increased with copying php to all folders, still limited with CPU time limit	7MB
Can host Adult Content	Yes	No	Yes
Loading speed for a 64kb website size	2-3 Seconds performance is stable since dreamhost upgraded to new servers	2-3 Seconds, performance was stable	5-6 Seconds
Midnight Commander	Installed by default	Not installed and can not install it	Not sure

Webin Configuration

admin — Fri, 15 Jul 2011 01:56:24 +0000

For security it is better to change the port in webmin from 10000 to another number to do this change that in webmin.

Under Webmin>Webmin Configuration>Ports and Addresses

Under Listen on port: choose a 5 digit number.

Then in ssh root

you need to allow the new port

with the command:

system-config-securitylevel-tui

Use tab to get to Customize then add your port.

Basic vi Commands

admin — Sun, 10 Jul 2011 02:26:11 +0000

Basic vi Commands

What is `vi`?

The default editor that comes with the UNIX operating system is called vi (visual editor). [Alternate editors for UNIX environments include pico and emacs, a product of GNU.]

The UNIX vi editor is a full screen editor and has two modes of operation:

Command mode commands which cause action to be taken on the file, and
Insert mode in which entered text is inserted into the file.

In the command mode, every character typed is a command that does something to the text file being edited; a character typed in the command mode may even cause the vi editor to enter the insert mode. In the insert mode, every character typed is added to the text in the file; pressing the (Escape) key turns off the Insert mode.

While there are a number of vi commands, just a handful of these is usually sufficient for beginning vi users. To assist such users, this Web page contains a sampling of basic vi commands. The most basic and useful commands are marked with an asterisk (* or star) in the tables below. With practice, these commands should become automatic.

NOTE: Both UNIX and vi are case-sensitive. Be sure not to use a capital letter in place of a lowercase letter; the results will not be what you expect.

To Get Into and Out Of `vi`

To Start `vi`

To use vi on a file, type in vi filename. If the file named filename exists, then the first page (or screen) of the file will be displayed; if the file does not exist, then an empty file and screen are created into which you may enter text.

*	`vi filename`	edit `filename` starting at line 1
	`vi -r filename`	recover `filename` that was being edited when system crashed

To Exit `vi`

Usually the new or modified file is saved when you leave vi. However, it is also possible to quit vi without saving the file.

Note: The cursor moves to bottom of screen whenever a colon (:) is typed. This type of command is completed by hitting the (or ) key.

*	`: x`	quit `vi`, writing out modified file to file named in original invocation
	`:wq`	quit `vi`, writing out modified file to file named in original invocation
	`:q`	quit (or exit) `vi`
*	`:q!`	quit `vi` even though latest changes have not been saved for this `vi` call

Moving the Cursor

Unlike many of the PC and MacIntosh editors, the mouse does not move the cursor within the vi editor screen (or window). You must use the the key commands listed below. On some UNIX platforms, the arrow keys may be used as well; however, since vi was designed with the Qwerty keyboard (containing no arrow keys) in mind, the arrow keys sometimes produce strange effects in vi and should be avoided.

If you go back and forth between a PC environment and a UNIX environment, you may find that this dissimilarity in methods for cursor movement is the most frustrating difference between the two.

In the table below, the symbol ^ before a letter means that the key should be held down while the letter key is pressed.

*	`j` or [or down-arrow]	move cursor down one line
*	`k` [or up-arrow]	move cursor up one line
*	`h` or [or left-arrow]	move cursor left one character
*	`l` or [or right-arrow]	move cursor right one character
*	`0` (zero)	move cursor to start of current line (the one with the cursor)
*	`$`	move cursor to end of current line
	`w`	move cursor to beginning of next word
	`b`	move cursor back to beginning of preceding word
	`:0` `or 1G`	move cursor to first line in file
	`:n` `or nG`	move cursor to line `n`
	`:$` `or G`	move cursor to last line in file

Screen Manipulation

The following commands allow the vi editor screen (or window) to move up or down several lines and to be refreshed.

	`^f`	move forward one screen
	`^b`	move backward one screen
	`^d`	move down (forward) one half screen
	`^u`	move up (back) one half screen
	`^l`	redraws the screen
	`^r`	redraws the screen, removing deleted lines

Adding, Changing, and Deleting Text

Unlike PC editors, you cannot replace or delete text by highlighting it with the mouse. Instead use the commands in the following tables.

Perhaps the most important command is the one that allows you to back up and undo your last action. Unfortunately, this command acts like a toggle, undoing and redoing your most recent action. You cannot go back more than one step.

*	`u`	UNDO WHATEVER YOU JUST DID; a simple toggle

The main purpose of an editor is to create, add, or modify text for a file.

Inserting or Adding Text

The following commands allow you to insert and add text. Each of these commands puts the vi editor into insert mode; thus, the key must be pressed to terminate the entry of text and to put the vi editor back into command mode.

*	`i`	insert text before cursor, until hit
	`I`	insert text at beginning of current line, until hit
*	`a`	append text after cursor, until hit
	`A`	append text to end of current line, until hit
*	`o`	open and put text in a new line below current line, until hit
*	`O`	open and put text in a new line above current line, until hit

Changing Text

The following commands allow you to modify text.

*	`r`	replace single character under cursor (no needed)
	`R`	replace characters, starting with current cursor position, until hit
	`cw`	change the current word with new text, starting with the character under cursor, until hit
	`cNw`	change `N` words beginning with character under cursor, until hit; e.g., `c5w` changes 5 words
	`C`	change (replace) the characters in the current line, until hit
	`cc`	change (replace) the entire current line, stopping when is hit
	`Ncc` or `cNc`	change (replace) the next N lines, starting with the current line, stopping when is hit

Deleting Text

The following commands allow you to delete text.

*	`x`	delete single character under cursor
	`Nx`	delete N characters, starting with character under cursor
	`dw`	delete the single word beginning with character under cursor
	`dNw`	delete `N` words beginning with character under cursor; e.g., `d5w` deletes 5 words
	`D`	delete the remainder of the line, starting with current cursor position
*	`dd`	delete entire current line
	`Ndd` or `dNd`	delete `N` lines, beginning with the current line; e.g., `5dd` deletes 5 lines

Cutting and Pasting Text

The following commands allow you to copy and paste text.

	`yy`	copy (yank, cut) the current line into the buffer
	`Nyy` or `yNy`	copy (yank, cut) the next N lines, including the current line, into the buffer
	`p`	put (paste) the line(s) in the buffer into the text after the current line

Other Commands

Searching Text

A common occurrence in text editing is to replace one word or phase by another. To locate instances of particular sets of characters (or strings), use the following commands.

	`/string`	search forward for occurrence of `string` in text
	`?string`	search backward for occurrence of `string` in text
	`n`	move to next occurrence of search string
	`N`	move to next occurrence of search string in opposite direction

Determining Line Numbers

Being able to determine the line number of the current line or the total number of lines in the file being edited is sometimes useful.

	`:.=`	returns line number of current line at bottom of screen
	`:=`	returns the total number of lines at bottom of screen
	`^g`	provides the current line number, along with the total number of lines, in the file at the bottom of the screen

Saving and Reading Files

These commands permit you to input and output files other than the named file with which you are currently working.

	`:r filename`	read file named `filename` and insert after current line (the line with cursor)
	`:w`	write current contents to file named in original `vi` call
	`:w newfile`	write current contents to a new file named `newfile`
	`:12,35w smallfile`	write the contents of the lines numbered 12 through 35 to a new file named `smallfile`
	`:w! prevfile`	write current contents over a pre-existing file named `prevfile`

Source cs.colostate.edu

SSH Vi editor commands

admin — Sat, 25 Jun 2011 22:28:36 +0000

To exit…

vi – press escape to get into command mode if you re not already in command mode (if you are, it s OK to press it anyway). :q to quit :w to save, :wq to do both.

emacs – ^X^S to save, ^X^C to quit

Upgrading PHP version on Centos from 2.5.10 to

admin — Wed, 22 Jun 2011 05:24:57 +0000

FIREWALL[root@CentOS-56-64-minimal ~]# system-config-securitylevel-tui
WEBMIN>SYSTEM> SOFTWARE PACKAGES search for php

Solution in Centos 5 and Fedora 9:

Through SSH:
yum search mbstring

yum install php-mbstring

/etc/init.d/httpd restart

INCREASE MYSQL MEMORY

vi /etc/my.cnf

SSH how to empty a text file?

hismis — Mon, 13 Jun 2011 06:59:54 +0000

just copy /dev/null to that file. eg: cp /dev/null

Exclude a directory to tar

hismis — Sat, 12 Mar 2011 23:01:08 +0000

Here is an example how to backup your site, and a exclude a directory :

tar -cf backup.tar –exclude={/home/yoursite/public_html/wp-content/uploads/*} /home/yoursite/public_html/

backup.tar : Backup file name.

To exclude more than one directory : – exclude={”/proc/*”,”/sys*”,”/tmp/*”,”/home/user/*”}

How to increase UPLOAD MAX FILE SIZE for DREAMHOST?

admin — Mon, 11 Oct 2010 00:40:16 +0000

This article is a slightly modified article from a great blog post at www.bluesunray.com about how to have our own php.ini with dreamhost.Thank you for your work:
0-Set up your domain for FastCGI (usually it is the case by default)
Login your Dreamhost, enter Manage Domains, Edit your domain setup, in Web Options->PHP mode, select ‘PHP 5 FastCGI’

Download DreamHost Custom PHP.ini from DeamHost Scripts and Tips. Or attached here as of today dh-phpini
Extract the dh-phpini.php from dh-phpini.zip and upload it to you website root.
Open dh-phpini.php in you browse. Example: http://www.yoursite.com/dh-phpini.php.
Then, this result shows,
After install, this script create ‘cgi-bin’ folder in you website root, including ‘php.ini’ files in the folder, and add this lines in you .htaccess file, if they are not there already:

AddHandler fastcgi-script fcg fcgi fpl
AddHandler php-fastcgi .php
Action php-fastcgi /cgi-bin/dispatch.fcgi

6. Default, the Max upload file size increase to 20M, if you want to change to more, edit php.ini file in ‘cgi-bin’ folder like this,

post_max_size = 50M

upload_max_filesize = 50M

7.For changes to the new php.ini file to take effect , you’ll probably need to restart FastCGI for them to take effect.

Unfortunately you can’t do this from the Dreamhost Control Panel. You need to log in via SSH, and issue the command “killall -9 php5.cgi” to restart FastCGI.

Commands using iconv to fix website Characters

admin — Thu, 04 Jun 2009 03:49:43 +0000

Here are some useful SSH commands to fix special characters on your website.

Sometimes you would see ? or strange charsets…

Recommended to use UTF-8 and have your database collation also as utf-8

Convert a bunch of HTML files from ISO-8859-1 to UTF-8 file encoding in a folder and all sub-folders

for x in `find . -name ‘*.html’` ; do iconv -f ISO-8859-1 -t UTF-8 $x > “$x.utf8″; rm $x; mv “$x.utf8″ $x; done

Convert mysql database from latin1 to utf8

mysqldump –add-drop-table -uroot -p “DB_name” | replace CHARSET=latin1 CHARSET=utf8 | iconv -f latin1 -t utf8 | mysql -uroot -p “DB_name”

find . -name “*.php” -exec iconv -f ISO-8859-1 -t UTF-8 {} -o ../newdir_utf8/{} \;

Batch convert files to utf-8

iconv -f ISO8859-1 -t UTF-8 OLDFILE > NEWFILE

For example in ssh type:
iconv -f ISO8859-1 -t UTF-8 listing_default.tpl >listing_default2.tpl

Then rename or delete your old listing_default.tpl and rename listing_default2.tpl to listing_default.tpl

Anti HostMonster » ssh

MySQL: Repair & Optimize all Tables in all Databases

Best Webhost

DreamHost

With our promo take 50 USD OFF using promotional code: GIVE50GIFT

Webin Configuration

Basic vi Commands

Basic vi Commands

What is vi?

To Get Into and Out Of vi

To Start vi

To Exit vi

Moving the Cursor

Screen Manipulation

Adding, Changing, and Deleting Text

Inserting or Adding Text

Changing Text

Deleting Text

Cutting and Pasting Text

Other Commands

Searching Text

Determining Line Numbers

Saving and Reading Files

SSH Vi editor commands

Upgrading PHP version on Centos from 2.5.10 to

SSH how to empty a text file?

Exclude a directory to tar

How to increase UPLOAD MAX FILE SIZE for DREAMHOST?

Commands using iconv to fix website Characters

What is `vi`?

To Get Into and Out Of `vi`

To Start `vi`

To Exit `vi`