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authoralex <alex@pdp7.net>2026-02-22 13:05:41 +0100
committeralex <alex@pdp7.net>2026-02-22 13:06:33 +0100
commitf37abef7167e88969350414b42ebf07c1df7f9b1 (patch)
tree931fad4abdea2513254b9f3f984545fa7d8b7058 /linux/misc.md
parenta8cf2dbfa425057f5b0f625b0f515c1f5cb89f72 (diff)
Move misc linux stuff to blog website
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-# Misc
-
-## Reverse sshfs
-
-https://blog.dhampir.no/content/reverse-sshfs-mounts-fs-push
-
-You need the SFTP server program on your local machine (on Debian, the `openssh-server` package) and sshfs on the remote machine.
-
-## Find non-Debian packages
-
-```
-aptitude search '~S ~i !~ODebian'
-```
-
-## Memory usage queries
-
-### systemd
-
-```
-systemd-cgtop -m
-```
-
-Drill down with:
-
-```
-systemd-cgtop -m user.slice/user-1000.slice
-```
-
-### smem
-
-```
-sudo smem -P beam.smp -kta
-```
-
-## Quick rerouting of browser traffic through another host
-
-`ssh -D 1234 host` creates a Socks proxy on `localhost:1234` that sends traffic through `host`.
-
-By enabling "allow extension to control proxy settings" in the [multi account containers](https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/) Firefox add-on, you can make containers use specific proxies.
-
-## Email forwarding via IMAP
-
-When you have multiple email addresses, you have multiple options to use them.
-
-Traditionally, people used redirection/forwarding to make email arriving at `from@example.com` go to `to@example.net` instead.
-
-If mail from `example.com` and `example.net` is handled by different servers, typically you can configure the `example.com` mail server to resend any message arriving to the `from` address to `to@example.net`.
-
-However, nowadays with spam filtering, the `example.net` mail server can reject these emails as spam, sometimes silently.
-
-For safer redirects, you can:
-
-* Use the same mail server for both accounts.
- However, this sometimes cannot be done or has extra cost and complexity.
-
-* Configure the destination email server to fetch email from the origin mail server.
- For example, Gmail can do this, but the fetching period can be as long as 15 minutes.
- This can be inconvenient when receiving confirmation emails, etc.
-
- Additionally, operators of the destination email server now have your credentials.
-
-A third option is to run this fetching process yourself.
-
-<https://github.com/lefcha/imapfilter> supports connecting to an IMAP account, waiting until messages to arrive, and moving them to another IMAP account.
-
-Benefits:
-
-* IMAPFilter can use IMAP idle to request the IMAP server to notify when messages arriving, so forwarding happens without a polling delay.
-* Because IMAP is used on both sides, no spam filtering happens.
-* IMAPFilter is [packaged for many distributions](https://repology.org/project/imapfilter/versions).
-
-Drawbacks:
-
-* Requires additional infrastructure.
-* If IMAPFilter stops working, email stops being forwarded without warning.
-
-Refer to [this Python module](../scripts/p7s/mail/__init__.py) for scripts that configure IMAPFilter as a systemd service, with credentials from Bitwarden.