Windows common directory and app path

System configure tool and file

system property and variable settings (virtual ram, paging file)
```
SystemPropertiesAdvanced
```

user system property

rundll32 sysdm.cpl,EditEnvironmentVariables

hosts file
```
\Windows\System32\drivers\etc\hosts
```
disk manager
```
diskmgmt.msc
```

start up list

%userprofile%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup

Boot and start-up list
```
msconfig
```

control panels (path)

# uninstall program
Control Panel\All Control Panel Items\Programs and Features
# pen and touch for windows
Control Panel\All Control Panel Items\Pen and Touch
# tablet settings for windows
Control Panel\All Control Panel Items\Tablet PC Settings
# network location
Control Panel\Network and Internet\Network Connections
# network connection
Control Panel\All Control Panel Items\Network and Sharing Center

System app

Mac OS X common directory and app path

System configure tool and file

system property and variable settings
hosts file
```
\etc\hosts
```

disk manager

open -a /Applications/Utilities/Disk\ Utility.app

activity monitor
```
open -a Activity\ Monitor
```
script editor
```
open -a script\ editor
```
caculator
```
open -a calculator
```
control panels
```
open -a system\ preferences
```

Startup directory

/Library/StartupItems
/System/Library/StartupItems
 
# structure demo
# MyStartupItem/
#    MyStartupItem
#    StartupParameters.plist
# ref: http://developer.apple.com/library/mac/#documentation/MacOSX/Conceptual/BPSystemStartup/Articles/StartupItems.html
 
# example
sudo vi myStartRun/myStartRun
sudo vi myStartRun/StartupParameters.plist
# optional: sudo vi myStartRun/Resources/English.lproj 
sudo chown -R root myStartRun/
sudo chgrp -R wheel myStartRun/
sudo chmod 755 myStartRun/myStartRun
# the plist template

<?xml version=”1.0? encoding=”UTF-8??>
<!DOCTYPE plist SYSTEM “file://localhost/System/Library/DTDs/PropertyList.dtd”>
<plist version=”0.9?>
<dict>
<key>Description</key>
<string>__MyScriptName__</string>
 
<key>OrderPreference</key>
<string>Late</string>
 
<key>Provides</key>
<array>
<string>whatever</string>
</array>
 
<key>Uses</key>
<array>
<string>SystemLog</string>
</array>
</dict>
</plist>

ref:http://www.kharysharpe.com/2011/04/automatically-starting-xampp-on-mac-osx-boot-up/

Startup script (not working after Tiger OSX)

/var/root/Library/Preferences/com.apple.loginwindow
 
sudo defaults write com.apple.loginwindow LoginHook /path/to/script
sudo defaults write com.apple.loginwindow LogoutHook /path/to/script

ref: http://hintsforums.macworld.com/showthread.php?t=39095

Linux common directory and app path

start-up directory with different admin level

/etc/rc.d
/etc/rc0.d /etc/rc1.d /etc/rc2.d /etc/rc3.d /etc/rc4.d /etc/rc5.d /etc/rc6.d

start-up directory
```
/etc/init.d/
```
- initialize rc
```
/etc/init.d/rc
```
start-up script: put your cmd here to run at start-up
```
/etc/rc.local
```

ref: http://luv.asn.au/overheads/linux-startup.html

Run Level	Generic	Fedora Core
0	Halt	Halt
1	Single-user mode	Single-user mode
2	Basic multi-user mode (without networking)	User definable (Unused)
3	Full (text based) multi-user mode
4	Not used	Not used
5	Full (GUI based) multi-user mode	Full multi-user mode (with an X-based login screen) - default runlevel
6	Reboot	Reboot

run that level
```
init 6
```
runlevel config
```
/etc/inittab
```

task manager

ps aux
top
ps -A
 
# ref: http://www.cyberciti.biz/faq/show-all-running-processes-in-linux/

Ref Table

Variable	Windows XP	Windows Vista/7	Mac OS X	Linux
%ALLUSERSPROFILE% (%PROGRAMDATA%)	C:\Documents and Settings\All Users	C:\ProgramData	?	?
%APPDATA%	C:\Documents and Settings\{username}\Application Data	C:\Users\{username}\AppData\Roaming	?	?
%COMPUTERNAME%	{computername}	{computername}	?	?
%COMMONPROGRAMFILES%	C:\Program Files\Common Files	C:\Program Files\Common Files	?	?
%COMMONPROGRAMFILES(x86)%	C:\Program Files (x86)\Common Files	C:\Program Files (x86)\Common Files	?	?
%COMSPEC%	C:\Windows\System32\cmd.exe	C:\Windows\System32\cmd.exe	?	?
%HOMEDRIVE%	C:	C:	?	?
%HOMEPATH%	\Documents and Settings\{username}	\Users\{username}	?	?
%LOCALAPPDATA%	[NOT AVAILABLE]	C:\Users\{username}\AppData\Local	?	?
%LOGONSERVER%	\\{domain_logon_server}	\\{domain_logon_server}	?	?
%PATH%	C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;{plus program paths}	C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;{plus program paths}	?	?
%PATHEXT%	.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.WSF;.WSH	.com;.exe;.bat;.cmd;.vbs;.vbe;.js;.jse;.wsf;.wsh;.msc	?	?
%PROGRAMFILES%	C:\Program Files	C:\Program Files	?	?
%PROGRAMFILES(X86)%	C:\Program Files (x86) (only in 64-bit version)	C:\Program Files (x86) (only in 64-bit version)	?	?
%PROMPT%	Code for current command prompt format. Code is usually $P$G	Code for current command prompt format. Code is usually $P$G	?	?
%SystemDrive%	C:	C:	?	?
%SystemRoot%	The Windows directory, usually C:\Windows, formerly C:\WINNT	C:\Windows	?	?
%TEMP% and%TMP%	C:\Documents and Settings\{username}\Local Settings\Temp	C:\Users\{username}\AppData\Local\Temp	?	?
%USERDOMAIN%	{userdomain}	{userdomain}	?	?
%USERNAME%	{username}	{username}	?	?
%USERPROFILE%	C:\Documents and Settings\{username}	C:\Users\{username}	?	?
%WINDIR%	C:\Windows	C:\Windows	?	?
%PUBLIC%	C:\Users\Public	?	?
%PROGRAMDATA%	Only available in Windows Vista and newer versions	C:\ProgramData	?	?
%PSModulePath%	%SystemRoot%\system32\WindowsPowerShell\v1.0\Modules\	?	?
hosts	%systemroot%\system32\drivers\etc\hosts	%systemroot%\system32\drivers\etc\hosts	/etc/hosts	/etc/hosts

Table of Contents

Windows common directory and app path

Mac OS X common directory and app path

Linux common directory and app path

Ref Table