Linux: My Missing Manual

Some Linux commands are useful but I didn’t use it very often. Here I prepare a list to look up faster. It will be maintained and updated here.

  1. cat
  2. e2fsck: Check and Repair File System
  3. find: Look for files in directories
  4. free: Check Memory Usage
  5. ifconfig: Manage Network Interface
  6. rm -rf <directory>: Remove directories and contents
  7. tar: Compress or decompress directories and contents
  8. Accelerators

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FileSync for Different Device

There are many file synchronization software available. It compares source with target and copy only the changed files. Save time for a full copy.

You may choose online storage like and Dropbox. They both have version for undelete. SkyDrive seems only have recycle bin without version. provides Version History in paid subscription. Unfortunately, Neither SkyDrive nor have official Linux client.

But for private data, huge and archived files, I will backup to external storage or NAS. Here I am going to explain my preferred software for different devices.

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Download and Verify OpenSuSE 13.1 Image with Hash

It’s good to see OpenSuSE 13.1 is available for download on 2013/11/19. But it is difficult to download from Direct Link, too crowded. I select Pick Mirror, and it will list several mirror site for you. Choose the closest may speed up your download.

Please verified your download before you use it. Make sure it is the same as the original copy. I use SHA-256 and MD5 to double confirm. A good hash function should generate no collisions on different source. On the other hand, if it is the same content, the hash should be exactly the same.

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