Prevent Linux from adding a file to the memory cache?

Question

Hope you all saw the wonderful site, Linux Ate My Ram. This is usually great, but for me it's a problem. I have a protected file that I decrypt with gpg, and then read into memory for processing. An unencrypted file is deleted after a while, but I DO NOT want this decrypted file to be stored in the Linux cache file in memory.

Is there a way to explicitly prevent saving a file from the Linux cache?

Thank!

Answer 1

Use gpg -dthat will cause the GPG to output the file to STDOUT, so that you can have all of this in memory.

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Answer 2

gpg, ramfs. .

ramfs , ( root):

mount none /your/mnt/point -t ramfs

, tmpfs. , . , tmpfs .

Answer 3

. .

shred -u $FILE

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