-h human readable
-s summary
Examples:
du -sh => total size of current directory human readable
This counts all of the files in the current directory and all children directories:
find . -type f | wc -l
The basic syntax of the find command is:
$ find . -name foo.bar
This will recurssively search starting in the current directory (.), and all subdirectories of the current directory, for the file named <filename>.
To filter out "Permission Denied" messages, use:
$ find . -name foo.bar -print 2>/dev/null
uname -a
permissions are represented by 3 digits
ugo => u=owner, g=group, o=otherw
1=execute, 2=write, 4=read
chmod 664 file => read and write access for the owner and group, read only for all others.
chmod 0 => removes all priveledges for all
chmod -R 755 => recursive, read+write+execute for owner, read+execute for group and others
Generalized Regular Expression Parser
grep string file => finds all occurances of <string> in <file>
-i => ignore case
-w => whole word
-l => list file name only
grep -r 'searchstring' /home => recursive - search all files
find /somedir -name '*.doc' -print | xargs grep 'somestring' /dev/null =>
recursive - specify specific file pattern
To create a compressed tar file: tar -cvf
To uncompress a tar file: tar -xvf
c=compress x=extract z=zip-format v=verbose (optional) f=file (must be last)
Examples: Create:
tar -czvf mystuff.tgz mystuff/
tar -cvzf file.tar.gz inputfile1 inputfile2
Extract: tar -xzvf mystuff.tgz tar -xvzf file.tar.gz
Goto:
: => line mode, operates on current line unless specific line numbers are specified
^ or 0 ==> beginning of line
$ ==> end of line
:0==>beginning of file
G ==> end of file
nG ==> go to line n
:n ==> go to line n
Return ==> first non-blank char
H ==> top line on screen
L ==> last line on screen
M ==> middle of screen
Ctrl+L ==> Redraw screen??
b beginning of previous word
w beginning of next word
e end of current/next word
0 (zero) or ^ beginning of line
$ end of line
( beginning of current/previous sentence
) beginning of next sentence
{ beginning of current/previous paragraph
} end of current paragraph
H top line on screen
M middle line on screen
L bottom line on screen
The search command is /. /hello => search for "hello" n repeats the search in the same direction N repeats the search in the opposite direction :s/search_string/replacement_string => global search and replace :s/search_string/replacement_string/g => global search and replace :s/search_string/replacement_string/gc => global search and replace with confirm
yw yank rest of word
y$ yank rest of line
yy yank entire line
Y yank entire line
p put yanked/deleted text before cursor
P put yanked/deleted text after cursor
A symbolic link, also known as a soft link or symlink, is a special type of file that points to another file or directory.
ln -s {target} {symlink name}
For, to example create a symlink for /home/domain/mydomain:
ln -s /home/domain/mydomain mydomain
'''MySQL'''
mysql -u root -h localhost -p < import.sql
Shutdown local: go to mysql bin directory then:
mysqladmin -u root -p shutdown
To generate create table code, you could run a mysqldump on the database, which generates code to create all of the tables in the database (and load all of the data).
You could also execute the single SQL command:
show create table <tablename>;
Using mysqladmin:
mysqladmin -u root -p status
Using ps:
ps aux ¦ grep mysql
The MySQL Socket file "mysql.sock" can be used to communicate with the server, as opposed to using TCPIP. Often the MySQL socket file is located '/var/lib/mysql/mysql.sock' or '/tmp/mysql.sock', although this may vary from one installation to another.
Snippets for Drupal:
Print node fields to screen:
<pre>
<?php print_r($node) ?>
</pre>
Print Node Body:
<?php print $node->content['body']['#value']; ?>
<?php print=""><?php>
var_dump displays structured information about one or more expressions that including its type and value. A recursive listing is created for Arrays and Objects, with values indented to show structure.
Public, private and protected Object properties are returned in the output.
When setting security permissions in Linux, it may be important to figure out the name of the Apache and PHP users. Often they are the same. To find the name of the Apache user, issue the command:
ps -ef | grep apache
To determine the name of the PHP user, create and execute a PHP script with the following code:
<?php echo posix_getuid();?>
Where is php.ini?
From the Linux command line:To determine the location of php.ini, run the following (Linux only):
php -r "phpinfo();" | grep Configuration
From Drupal:
The default PHP timeout in php.ini is 30 seconds, which is too short for some Drupal activities like listing/enabling modules.
snv info - status of current directory if it is a working copy
svn commit - commit changes to repository
svn update - update working copy with latest changes from repository