/kb

I got the following error message, caused by a bug in Ubuntu.:

PHP Warning:  PHP Startup: Unable to load dynamic library
'/usr/lib/php5/20060613+lfs/imagick.so' -
libWand.so.9: cannot open shared object file:
No such file or directory in Unknown on line 0 finished.

Here’s the solution.

Pasting code into a VIM running in terminal has never worked properly for me. It occured to me that Google might have some information on the topic. It turned out to be ridiculously easy:

:set nopaste

Paste your code, and then:

:set paste

Ref.: vim.org.

By using fsck as described below I managed to restore one of my hard drives.

$ fsck.msdos -r -v -V /dev/hda2

According to the man file, the options have the following effects:

Reference: Fedora Mailing List.

In order to compare objects in Java we are taught to use the equals()-method, except when the goal is to check for object reference, explicitly, then the == operator must be used. However, String objects does not behave entirely as expected, as seen from the following example.

  String s1 = "Fish";
  String s2 = "Fish";
 
  String s3 = new String("Fish");
  String s4 = new String("Fish");
 
  System.out.println(s1 == s2);       // true
  System.out.println(s1.equals(s2));  // true
 
  System.out.println(s3 == s4);       // false
  System.out.println(s3.equals(s4));  // true

The reason for this behaviour is that strings s3 and s4 are created outside of the string pool. In the string pool, String objects with the same value are set to the same object internally in order to save space.

GRANT ALL PRIVILEGES ON thedatabase.* TO 'theusername'@'localhost'
	IDENTIFIED BY 'thepassword' WITH GRANT OPTION;

UPDATE 20080916: Skip the last line if the user exists.

find is an extremely powerful command. In order to leave the directory matching *DIRECTORY* out from your search for .txt-files:

find . -path '*DIRECTORY*' -prune -o -iname '*.txt' -print

If you’re using xargs together with find and xargs complains about file names with spaces, use:

find . YOURFINDOPTIONSHERE -print0 | xargs -0 rm -rf

Finding files larger than a certain limit:

find . -size +200M -print0 | xargs -0 ls -lh

Deleting the complementary files:

find . ! -name "*.mp3" -delete

Courtesy of HÃ¥kon.

Please note that these commands pertains to the BSD find as on Mac OS 10.5.

UPDATE 20080517: Looking for file size
UPDATE 20080602: Added deleting complement

It’s very easy, but I always have to look it up.

mysqldump --opt -u USERNAME -p -h HOST.HOST.COM DATABASE_TABLE > DUMPFILE.sql

There are numerous pages and blog posts about Vi and Vim out there so here’s my small contribution. Here are some less frequently used commands that tends to be useful from time to time:

:g/pattern/d

g;

g,

mLETTER

'LETTER

gU

gf

:/pattern/yank A

"ap

C-w -

C-w +

C-w =

By putting print_r() statements enclosed by html pre-tag, the output is quite a lot more readable.