1. Open up VirtualBox 2. Click New 3. Type the name: CentOS7 4. Click Continue 5. Add memory: 2048 MB 6. Click Continue 7. Select: Create a virtual hard disk now 8. Click Create 9. Keep VDI (VirtualBox Disk Image) 10. Click Continue 11. Select Dynamically allocated 12. Click Continue 13. Add virtual hard disk size: 20.00 MB 14. Click Create 15. Click Settings 16. Click Storage 17. Click Empty 18. Click Optical Drive (image of a disk) 19. Click Choose Virtual Optical Disk File... 20. Find the folder with the ISO image file 21. Click on CentOS-7-x86_64-DVD-1511.iso 22. Click Open 23. Click OK 24. Click Start 25. Select English 26. Click Continue 27. Click Software Selection 28. Click: KDE Plasma Workspaces, Internet Applications, KDE Applications, KDE Multimedia Support< Office Suite and Productivity 29. Click Done 30. Click: Installation Destination 31. Click Done 32. Click Network & Host Name 33. Click On 34. Click Done 35. Click Begin Installation 36. Click User Creation 37. Enter full name 38. Enter user name 39. Enter password 39a. Click "Make user administrator" 40. Click Done 41. Click Root Password 42. Enter password 43. Click Done 44. Click Reboot 45. Type on commandline: c 46. Press Enter 47. Type on commandline: 1 48. Press Enter 49. Type on commandline: 2 50. Press Enter 51. Type on commandline: c 52. Press Enter 53. Type on commandline: c 54. Press Enter 55. Enter password 56. Click Kickoff Application Launcher 57. Type in search text box: kon 58. Click Konsole 59. Click Add to Desktop 60. Click on Konsole icon 61. Type on commandline: sudo yum update kernel* 62. Press Enter 63. Enter password 64. Type on commandline: y 65. Press Enter 66. Type on commandline: sudo yum -y install kernel-devel kernel-headers dkms gcc gcc-c++ 67. Press Enter 68. Click bottom left-hand corner 69. Click Leave 70. Click Restart 71. Enter password 72. Click Devices > Insert Guest Additions CD image... 73. Click open 74. Type on commandline: df -h 75. Type on commandline: cd /mnt/ 76. Click bottom left-hand corner 77. Click File Manager 78. Locate the folder with ISO image file 79. Type on commandline: cd /run/media/ 80. Type on commandline: cd username/ 81. Type on commandline: cd VBOXADDITIONS_5.0.14.105127/ (note: you can type a few letters, then press the Tab key to fill in the rest of the text automatically) 82. Type on commandline: sudo ./VBoxLinuxAdditions.run 83. Enter password 84. Close all windows 85. Click bottom left-hand corner 86. Click Leave 87. Click Restart 88. Enter password 89. Click Devices > Drag and Drop > Bidirectional 90. Click Devices > Shared Clipboard > Bidirectional
Original webpage by Petersen Gross, modified by William Albritton.