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FTP - how not to corrupt data (binary v ascii)

Greetings from Aylesbury ... where I am spending much of this week during the day giving a Linux (LAMP) course, and much of the evening catching up on work. So just a brief tip today ..

If you're transferring files with FTP, remember to specify Binary mode!.

Perhaps advise you've heard before and not fully understood why or perhaps - like most of us - something you've heard, forgotten, and then transferred a file to find that your hard-gotten data is corrupted.

In the default (ASCII) mode of transfer between windows and Linux / Unix systems, FTP translates new line sequences c/r, l/f to just l/f, or vice versa - thus effectively corrupting zip files, tar files, etc. It's made the worse by the fact that the mapping doesn't exactly reverse when you transfer the file the other way ... so a transfer from Linux to Windows in ASCII, followed by a transfer back also in ASCII leaves you with a corrupted file
(written 2008-06-24)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
W501 - Introduction to Web Site Structure
  [2552] Web site traffic - real users, or just noise? - (2009-12-26)
  [2282] Checking robots.txt from Python - (2009-07-12)
  [2214] Global Index to help you find resources - (2009-06-01)
  [2094] If you have a spelling mistake in your URL / page name - (2009-03-21)
  [1969] Search Engines. Getting the right pages seen. - (2009-01-01)
  [1636] What to do if the Home Page is missing - (2008-05-08)
  [1431] Getting the community on line - some basics - (2007-11-13)
  [1198] From Web to Web 2 - (2007-05-21)
  [1176] A pu that got me into trouble - (2007-05-04)
  [1168] Moving out some of the web site bloat - (2007-04-29)
  [1031] robots.txt - a clue to hidden pages? - (2007-01-13)
  [1024] Web site - a refresh to improve navigation - (2007-01-07)
  [528] Getting favicon to work - avoiding common pitfalls - (2005-12-14)
  [332] Looking up IP addresses - (2005-06-01)


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cannot restore segment prot after reloc message - PHP / httpd
Virtual Hosting on Apache httpd - a primer example
FTP - how not to corrupt data (binary v ascii)
Short circuit evaluation (lazy operator) in Lua
Two PHP include files to make easy web site indexing and navigation
Plenty of car parking at Well House Manor, Hotel, Melksham
Accounts in PHP - an OO demo
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