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For reuse, an OpenSIPS/Kamailio snippet to translate commonly used SIP (VoIP) phone Caller-ID (CLI) headers into a single one (Remote-Party-ID). It tries these headers in order, to do a best guess of what the caller wants: P-Asserted-Identity (with Privacy) P-Preferred-Identity (with Privacy) Remote-Party-ID From Of course you’ll have to run the found CLI against an allow list, but this code expects that to be done on the next hop. route[sub_cli_as_rpid] { $var(tmp_name) = ""; # (nothing) $var(tmp_num) = "Anonymous"; # (unknown) $var(tmp_clir) = 0; # PAI/PPI-privacy if (is_present_hf("Privacy")) { if (!

More or less useless/useful tips and tricks, bundled together. They weren’t worthy of a box div on their own. I gave them only a li each. kill -WINCH $$ — when your terminal is messed up where the row moves up one line before you’ve reached the line-length ($COLUMNS): a SIGWINCH signal to the current shell will make everything alright again. hash -r — you moved applications around in your $PATH and bash claims that some applications don’t exist in your $PATH even though you (and ls) know that they do:

When upgrading Ubuntu command line, many people probably still change the release name in the sources.list and update && dist-upgrade. Although is still works fine, Ubuntu also provides extras on this front. Upgrade the new way: sudo do-release-upgrade Whats the benefit? It provides things like a temporary SSH server and probably does other sanity checks to increase the chances of an successful upgrade and eases the troubleshooting if things go wrong.

One useful tool we recently started using is etckeeper. It provides version control over your /etc/ directory, which may prove quite useful when you maintain system in co-op way with your customers. Etckeeper also comes with hooks for apt, so even if you use it terribly it does give you an insightful history of when which package was installed. Installation and setup in Ubuntu: apt-get install git etckeeper # change VCS in /etc/etckeeper/etckeeper.

Building Canon MF8350Cdn (and other) CUPS drivers for Linux Debian and/or Ubuntu on amd64 is still a pain in the behind. Problems encountered during the installation, include: Regular make installed stuff in different places but forgot many parts. Solution: use dpkg-buildpackage The libtool copied wasn’t able to build for shared libs. Solution: remove --enable-shared/--disable-shared command line options. amd64 had to be added to the architecture targets. A shell script had to lose a bashism.

If I’m going to be requesting SSL certificates more often, I’d better automate the process a bit. The result: easycert.sh (view) Possible invocation styles: $ easycert.sh -h Usage: easycert.sh -c NL -l Groningen -o OSSO\ B.V. -e info@osso.nl osso.nl Usage: easycert.sh osso.nl "/C=NL/L=Groningen/O=OSSO B.V./CN=osso.nl/" Usage: easycert.sh -T www.osso.nl 443 Generating a key and certificate: $ easycert.sh -o "My Company" mycompany.com Subject: /C=NL/L=Groningen/O=My Company/CN=mycompany.com/emailAddress=info@osso.nl Enter to proceed... Generating RSA private key, 4096 bit long modulus .

So, what is the difference between uid and euid and the setuid and seteuid calls? Hao Chen, David Wagner and Drew Dean wrote an excellent paper called Setuid Demystified. It explains all the ins and outs. To answer the question, we need only parts of the article. Let the quoting begin. Each process has three user IDs: the real user ID (real uid, or ruid), the effective user ID (effective uid, or euid), and the saved user ID (saved uid, or suid).

After tweaking my postfix configuration, I apparently broke submission on port 587. Every time I connected, I immediately got: 554 5.7.1 <my.host.name[1.2.3.4]>: Client host rejected: Access denied That’s strange. Postfix is supposed to reject unauthenticated clients only in master.cf: submission inet n - n - - smtpd -o smtpd_tls_security_level=encrypt -o smtpd_tls_auth_only=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject But if it rejects me at connect time, I don’t have a chance to identify myself.

IPython after version 0.10 is not friends with older Django (e.g. 1.1.x) versions anymore. shell = IPython.Shell.IPShell(argv=[]) AttributeError: 'module' object has no attribute 'Shell' This is fixed in newer Django’s, but this isn’t backported. Here, a patch. (Nothing more than a diff between the old and the new Django version.) --- django/core/management/commands/shell.py 2012-03-28 16:10:28.000000000 +0200 +++ django/core/management/commands/shell.py 2012-01-24 10:27:50.405338739 +0100 @@ -8,9 +8,38 @@ help='Tells Django to use plain Python, not IPython.

Bertrand Le Roy describes how Microsoft added a Date object extension to JSON in a compatible fashion to implement serialization and serialization of timezone agnostic datetimes. Our current approach is using a small loophole in the JSON specs. In a JSON string literal, you may (or may not) escape some characters. Among those characters, weirdly enough, there is the slash character ('/'). This is weird because there actually is no reason that I can think of why you’d want to do that.