Created Export configuration password to env variable and only remember it for some time (markdown)

Export-configuration-password-to-env-variable-and-only-remember-it-for-some-time.md

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+As [configuration encryption docs](https://rclone.org/docs/#configuration-encryption) mention:
+> If it is safe in your environment, you can set the `RCLONE_CONFIG_PASS` environment variable to contain your password, in which case it will be used for decrypting the configuration.
+
+It also provides a short script to do so, which can be improved to only remember your password for some time (similar to `sudo`). For Unix like systems you can save this to a file somewhere in your `$PATH`, e.g. `~/.local/bin/rclone-unlock`
+
+```sh
+#!/bin/echo Source this file don't run it
+
+echo "Password:"
+
+read -s RCLONE_CONFIG_PASS
+export RCLONE_CONFIG_PASS
+
+if [ -n $RCLONE_PASS_TIMEOUT ]; then
+  pid=$$
+  trap 'unset RCLONE_CONFIG_PASS' SIGALRM
+  ( ( sleep $RCLONE_PASS_TIMEOUT ; kill -ALRM $pid ) & )
+
+  echo -n "Password will be remembered in this session for $RCLONE_PASS_TIMEOUT"
+  [[ $RCLONE_PASS_TIMEOUT =~ [smhd] ]] && echo || echo " seconds"
+fi
+```
+
+Then source this file when you want to use it: `. rclone-unlock`. It will then ask you for the password and set it in the environment variable.
+
+If you set password timeout to some amount of time (in format [`sleep`](https://manpages.debian.org/testing/coreutils/sleep.1.en.html) accepts) with `RCLONE_PASS_TIMEOUT` environment variable, `RCLONE_CONFIG_PASS` will be unset after that time.
+
+You can also clear `RCLONE_CONFIG_PASS` sourcing `rclone-unlock` as usual and then just hitting <kbd>Enter</kbd> (thus setting empty password).