Posted by jpluimers on 2016/05/20
I bumped into a disk full issue again because of the btrfs/snapper combination in openSuSE and df basically lying about the disk space, so I w rote this Nice diskinfo alias showing du, df, btrfs, parted, lsblk.
You can combine this with A bash script to btrfs snapshot details like disk sizes (requires btrfs quota to be enabled) to find out which snapper snapshots take up a truckload of space and might be safely removed.
–jeroen
Posted in *nix, *nix-tools, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2016/05/03
After a recent big update to OpenSuSE Tumbleweed, I could not ssh into my system any more.
The ssh client side would report a Read from socket failed: Connection reset by peer which I misinterpreted as the sshd not running at all.
Luckily the server is a VM, so I could reach the console. There I saw this:
sshd trying to load files it shouldn’t
The files should not be loaded as they are not specified in the sshd_config file:
dsa and ecdsa not specified in the config file
So I knew something was broken. After reading some messages in the forums.opensuse.org I got at Bug 977812 – sshd killed by SIGSYS on client connection
As usual with such issues the cause seems a combination of factors:
And we have the culprit, I believe: together with the glibc upgrade, openssl
was updated from 1.0.2g-1.1 to 1.0.2-2.12 which brought, among others, patch
openssl-urandom-reseeding.patch.
A temporary fix is to comment out a line in /etc/sshd_config so you get this diff:
-UsePrivilegeSeparation sandbox # Default for new installations.
+# UsePrivilegeSeparation sandbox # Default for new installations.
Be sure to undo this as soon as you’ve received a final fix.
A final fix is being fast-tracked so it appears in Tumbleweed soon.
I will report after deployment of [opensuse-factory] New Tumbleweed snapshot 20160502 released! as I think it contains the fix.
I already knew about openQA: Test summary which lists the builds, but not the changes in the builds.
Reading through Information Board or the like for Tumbleweed I found the openSUSE Mailinglist Archive: opensuse-factory which does the announcements and release notes for Tumbleweed.
It had both the announcement of the “big patch”, ssh bug report and temporary fix:
–jeroen
Posted in *nix, Communications Development, Development, Internet protocol suite, Linux, openSuSE, Power User, SSH, SuSE Linux, TCP, Tumbleweed | 2 Comments »
Posted by jpluimers on 2016/04/11
Manually you can do it like this: How To Use Git to Manage your User Configuration Files on a Linux VPS | DigitalOcean.
But there is also etckeeper. There is even a set of manual installation steps for opensuse: backup – etckeeper for opensuse – bash script install and configure – Unix & Linux Stack Exchange.
Three important etckeeper gotchas with powerful scripts like pre-commit /etc/etckeeper/pre-commit.d:
/etc/etckeeper/pre-commit.d/10rsync-var-lib-named-master/etc/etckeeper/pre-commit.d/10rsync-var-lib-named-master.sh–jeroen
via:
Posted in *nix, *nix-tools, etckeeper, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2016/03/14
As etckeeper wasn’t available in the “normal” OpeenSuSE 13.1 package, I used the steps below to upgrade to 13.2 after reading SDB:System upgrade – openSUSE and How To Upgrade To openSUSE 13.2 From openSUSE 13.1 | Unixmen.
Note I installed inside tmux (to prevent any ssh disconnects from screwing the upgrade process):
Posted in *nix, etckeeper, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2016/03/10
Since ESXi is based on busybox, it is using ash a variation of sh (the classic bourne shell) called Almquist shell and most nxes use some form of bash a lot of things won’t work.
For instance, doesn’t support sh –version.
Luckily there are uname -mrs and (more elaborate) vmware -vl to get the version.
Note there is support busybox aliases so alias dir=”ls -laF” works, and you can define aliases for the version information too.
–jeroen
via:
Posted in *nix, *nix-tools, bash, Linux, Power User, SuSE Linux, Virtualization, VMware, VMware ESXi | Leave a Comment »
Posted by jpluimers on 2016/03/07
Reminder: install mosh and get it working when it runs behind a firewall.
Mobile shell that supports roaming and intelligent local echo. Like SSH secure shell, but allows mobility and more responsive and robust.
Links:
Then see how well it stacks up against or complements with the ssh/tmux combo.
–jeroen
Posted in *nix, Linux, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »
Posted by jpluimers on 2016/03/07
Last friday I updated the examples at *nix networking – lsof: How to tell what process has a specific port open on Linux (via: Server Fault) as I needed to document some of the machines around here (so it becomes easier replacing them).
I also added some links to background information and (when I get to using it: OS X still goes without) a good iproute2 starter page.
–jeroen
Posted in *nix, *nix-tools, Apple, Communications Development, Cygwin, Development, Internet protocol suite, Linux, Mac, Mac OS X / OS X / MacOS, Mac OS X 10.6 Snow Leopard, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, MacMini, OS X 10.10 Yosemite, OS X 10.8 Mountain Lion, OS X 10.9 Mavericks, Power User, TCP | Leave a Comment »
Posted by jpluimers on 2016/02/22
If for instance your Boxee gets old or breaks down, you can use a Raspberry Pi as a replacement with Kodi as media player.
This combination will understand the Video+USB over HDMI which most TV supports officially named HDMI-CEC , but most vendors “invented” their own names (see list below).
The core is the kodi support for CEC.
Basically it comes down to using three cables going to the Pi: Power from TV (or some other source), HDMI to TV, and wired Ethernet. And a distribution for RaspberryPi containing kodi will work, for instance from OpenELEC Mediacenter – Download: Raspberry Pi Builds
Chad MILLER has more details on how to get this to work: My Boxee box is getting old, but I knew of no replacements. The problem is I …
Names known for HDMI-CEC via Wikipedia:
Anynet+ (Samsung), Aquos Link (Sharp), BRAVIA Link and BRAVIA Sync (Sony), HDMI-CEC (Hitachi), E-link (AOC), Kuro Link (Pioneer), INlink (Insignia), CE-Link and Regza Link (Toshiba), RIHD (Remote Interactive over HDMI) (Onkyo), RuncoLink (Runco International), SimpLink (LG), T-Link (ITT), HDAVI Control, EZ-Sync, VIERA Link (Panasonic), EasyLink (Philips), and NetCommand for HDMI (Mitsubishi).
Because of the naming, turning on CEC can be confusing: How to Enable HDMI-CEC on Your TV, and Why You Should
–jeroen
Posted in *nix, *nix-tools, Development, Hardware Development, Hardware Interfacing, HDMI, Linux, Power User, Raspberry Pi | Leave a Comment »
Posted by jpluimers on 2016/02/05
Interesting:
Simon Wicki originally shared: really cool playback tool for showing step by step stuff in terminals. http://showterm.io
–jeroen
via: really cool playback tool for showing step by step stuff in terminals. ….
Posted in *nix, *nix-tools, Linux, Power User | Leave a Comment »
Posted by jpluimers on 2016/01/25
The solution: add both the +noall and +answer flags before the query.
dig +noall +answer google.de
–jeroen
via dig show only answer – Server Fault.
Posted in *nix, *nix-tools, Apple, Linux, Mac, Mac OS X / OS X / MacOS, Mac OS X 10.4 Tiger, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, OS X 10.10 Yosemite, OS X 10.8 Mountain Lion, Power User, SuSE Linux | Leave a Comment »
The Wiert Corner - irregular stream of stuff 