How do I create temporary files and directories using /dev/urandom on linux?
mountaing last edited by mountaing
Also see: Man page for urandom
If you need to be extra careful and secure about what to name your temporary file names. This can be used.
Important: Do not just cat the file /dev/urandom on its own, the file is a pseudodevice. It could terminate your shell session or lock it.
$ touch /tmp/secure_file.$(cat /dev/urandom | od -x | tr -d ' ' | head -n 1)
od -xcreate an octal dump,
tr -dremoves spaces,
head -n 1grabs the first line of the octal dump.
The result is:
$ ls /tmp/secure_file* -rw-rw-r-- 1 trainer trainer 0 Nov 13 11:45 secure_file.00000004e6a05447ce5151877e268374b6d5df4
The name is hard to guess but, you may want to make the permissions 600 as well
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