3 free online resources to help you learn Linux commands

These websites should provide you with the basic (up to advance) command line skills, as well as teach you some neat command line tricks.

1. LinuxCommand.org

LinuxCommand.org is a Linux education and advocacy site devoted to helping users of Linux operating systems.

Visit LinuxCommand.org.

2. Linux Command Directory

Linux Command Directory is a directory of 687 Linux commands with descriptions.

Visit Linux Command Directory.

3. The Linux Cookbook

The Linux Cookbook presents "recipes" for preparing or accomplishing a particular, specific thing.

Visit The Linux Cookbook.

One line command to update Ubuntu

I use this command to update my Ubuntu installation.

$ sudo apt-get update && sudo apt-get upgrade &&
sudo apt-get autoremove && sudo apt-get dist-upgrade

112 useful Windows XP commands

Here is a list of 112 useful Windows XP commands. You can run it from the command prompt, or using the Run command located in the Start menu.

1. Accessibility Controls: access.cpl
2. Add Hardware Wizard: hdwwiz.cpl
3. Add/Remove Programs: appwiz.cpl
4. Administrative Tools: control admintools
5. Automatic Updates: wuaucpl.cpl
6. Bluetooth Transfer Wizard: fsquirt
7. Calculator: calc
8. Certificate Manager: certmgr.msc
9. Character Map: charmap
10. Check Disk Utility: chkdsk
11. Clipboard Viewer: clipbrd
12. Command Prompt: cmd
13. Component Services: dcomcnfg
14. Computer Management: compmgmt.msc
15. Date and Time Properties: timedate.cpl
16. DDE Shares: ddeshare
17. Device Manager: devmgmt.msc
18. Direct X Control Panel: directx.cpl
19. Direct X Troubleshooter: dxdiag
20. Disk Cleanup Utility: cleanmgr
21. Disk Defragment: dfrg.msc
22. Disk Management: diskmgmt.msc
23. Disk Partition Manager: diskpart
24. Display Properties: control desktop
25. Display Properties: desk.cpl
26. Display Properties (Appearence tab): control color
27. Dr. Watson System Troubleshooting Utility: drwtsn32
28. Driver Verifier Utility: verifier
29. Event Viewer: eventvwr.msc
30. File Signature Verification Tool: igverif
31. Findfast: findfast.cpl
32. Folders Properties: control folders
33. Fonts: control fonts
34. Fonts Folder: fonts
35. Free Cell Card Game: freecell
36. Game Controllers: joy.cpl
37. Group Policy Editor: gpedit.msc
38. Hearts Card Game: mshearts
39. Hyper Terminal: hypertrm
40. Iexpress Wizard: iexpress
41. Indexing Service: ciadv.msc
42. Internet Properties: inetcpl.cpl
43. IP Configuration (Display Connection Configuration): ipconfig /all
44. IP Configuration (Display DNS Cache Contents): ipconfig /displaydns
45. IP Configuration (Delete DNS Cache Contents): ipconfig /flushdns
46. IP Configuration (Release All Connections): ipconfig /release
47. IP Configuration (Renew All Connections): ipconfig /renew
48. IP Configuration (Refreshes DHCP & Re-Registers DNS): ipconfig /registerdns
49. IP Configuration: ipconfig /showclassid
50. IP Configuration: ipconfig /setclassid
51. ava Control Panel: jpicpl32.cpl
52. Java Control Panel: javaws
53. Keyboard Properties: control keyboard
54. Local Security Settings: secpol.msc
55. Local Users and Groups: lusrmgr.msc
56. Logs You Out Of Windows: logoff
57. Mcft Chat: winchat
58. Minesweeper Game: winmine
59. Mouse Properties: control mouse
60. Mouse Properties: main.cpl
61. Network Connections: control netconnections
62. Network Connections: ncpa.cpl
63. Network Setup Wizard: netsetup.cpl
64. Notepad: notepad
65. Nview Desktop Manager: nvtuicpl.cpl
66. Object Packager: packager
67. ODBC Data Source Administrator: odbccp32.cpl
68. On Screen Keyboard: osk
69. Opens AC3 Filter: ac3filter.cpl
70. Password Properties: password.cpl
71. Performance Monitor: perfmon.msc
72. Performance Monitor: perfmon
73. Phone and Modem Options: telephon.cpl
74. Power Configuration: powercfg.cpl
75. Printers and Faxes: control printers
76. Private Character Editor: eudcedit
77. Quicktime: QuickTime.cpl
78. Regional Settings: intl.cpl
79. Registry Editor: regedit
80. Remote Desktop: mstsc
81. Removable Storage: ntmsmgr.msc
82. Removable Storage Operator Requests: ntmsoprq.msc
83. Resultant Set of Policy (XP Prof): rsop.msc
84. Scanners and Cameras: sticpl.cpl
85. Scheduled Tasks: control schedtasks
86. Security Center: wscui.cpl
87. Services: services.msc
88. Shared Folders: fsmgmt.msc
89. Shuts Down Windows: shutdown
90. Sounds and Audio: mmsys.cpl
91. Spider Solitare Card Game: spider
92. SQL Client Configuration: cliconfg
93. System Configuration Editor: sysedit
94. System Configuration Utility: msconfig
95. System File Checker Utility (Scan Immediately): sfc /scannow
96. System File Checker Utility (Scan Once At Next Boot): sfc /scanonce
97. System File Checker Utility (Scan On Every Boot): sfc /scanboot
98. System File Checker Utility (Return to Default Setting): sfc /revert
99. System File Checker Utility (Purge File Cache): sfc /purgecache
100. System File Checker Utility (Set Cache Size to size x): sfc /cachesize=x
101. System Properties: sysdm.cpl
102. Task Manager: taskmgr
103. Telnet Client: telnet
104. User Account Management: nusrmgr.cpl
105. Utility Manager: utilman
106. Windows Firewall: firewall.cpl
107. Windows Magnifier: magnify
108. Windows Management Infrastructure: wmimgmt.msc
109. Windows System Security Tool: syskey
110. Windows Update Launches: wupdmgr
111. Windows XP Tour Wizard: tourstart
112. Wordpad: write

Quick list of unix shell commands

Some Unix or Linux shell commands.

Cancel a command

Ctrl+U, Ctrl+X, or @

Change the working directory to /usr

cd /usr

Change the working directory back to your home directory

cd

Copy a file

cp oldfile newfile

Copy a file to another directory

cp oldfile dirname

Copy a bunch of files (e.g. filename1, filename2, ...) to another directory

cp filename* dirname

Copy all the files in this directory and in all its subdirectories

cp -r * newdir

Erase a file

rm filename

Rename a file

mv oldname newname

Move a file to another directory

mv oldfile dirname

List filenames

ls

List filenames with sizes and dates

ls -l

List hidden files too

ls -al

List files and pause when screen is full

ls | more

Look at a text file

cat filename

Look at a long text file

more filename

Make a new link (name) for a file

ln oldname newname

Make new links (names) for files in a directory

ln dirname/* newdir

Combine two files

cat file1 file2 > newfile

Compare two files

diff file1 file2

Look at the manual page for the ls command

man ls

Change your password

passwd