I have a favorite cheap chinese router based on RT5350 (running OpenWRT).
Recently, I was wondering, why I can’t get WiFi on a few of them working. I have one piece running quite old (4xxx svn) OpenWRT where the WiFi works OK. So I tried to compile exactly the same version and install it on the non working piece. I also put the same wifi config there but nothing. It didn’t work. Continue reading Fixing non-working WiFi on RT5350
This is how to change default SSL key size on iDRAC Dell R415 Continue reading 2048 bit SSL key on Dell iDRAC R415
eID obciansky je v podstate standardny pkcs11 system. Continue reading SSH autentifikacia s eID obcianskym preukazom pod Linuxom
echo | openssl s_client -connect mail.example.sk:25 -starttls smtp | openssl x509 -noout -dates
echo "XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X" | mail -s Spam_test danman@example.com
add following lines to /etc/amavis/conf.d/50-user (don’t forget the dot before domain, it has to be there):
@bypass_spam_checks_maps = ( [".example.com"], ); @spam_lovers_maps = ( [".example.com"], );
socat is a very handy networking tool. Here are some examples for multicast manipulation
If you save common mpeg-ts IPTV multicast this way, you can play it with any decent player, like vlc or mplayer.
SRC=239.1.2.3;SRCP=1234;IF=eth0 socat -T 3 UDP4-RECV:$SRCP,bind=$SRC,ip-add-membership=$SRC:$IF,reuseaddr - socat -T 3 UDP4-RECV:$SRCP,bind=$SRC,ip-add-membership=$SRC:$IF,reuseaddr - > stream.ts
socat relays packets from 239.1.1.1:1234 to 239.2.1.1:1234 with multicast ttl=8.
If no packet arrives in 3 seconds (-T 3), socat exits and script runs another socat which joins another multicast 239.1.1.2:1234 and continues with relaying. You can add as many sources as you want, they will be used in a round-robin fashion. If you want to switch to next source, just kill currently running socat.
DST=239.2.1.1:1234 while true do SRC=239.1.1.1;SRCP=1234;IF=eth0 socat -T 3 UDP4-RECV:$SRCP,bind=$SRC,ip-add-membership=$SRC:$IF,reuseaddr UDP4-SENDTO:$DST,ip-multicast-ttl=8 SRC=239.1.1.2;SRCP=1234;IF=eth0 socat -T 3 UDP4-RECV:$SRCP,bind=$SRC,ip-add-membership=$SRC:$IF,reuseaddr UDP4-SENDTO:$DST,ip-multicast-ttl=8 ... done
edit /etc/pulse/default.pa
before:
### Automatically load driver modules depending on the hardware available .ifexists module-udev-detect.so load-module module-udev-detect .else ### Use the static hardware detection module (for systems that lack udev support) load-module module-detect .endif
after:
### Automatically load driver modules depending on the hardware available #.ifexists module-udev-detect.so #load-module module-udev-detect tsched=0 #.else ### Use the static hardware detection module (for systems that lack udev support) load-module module-detect #.endif
Restart pulseaudio or the whole system.
For using various measurement tools like oscilloscopes, multimeters, logic analyzers etc. under Linux there is an amazing tool – sigrok. I was trying to make my cheap chinese logic analyzer LWLA1016 work and this is how I succeeded. Continue reading LWLA1016 in Linux
my patch in dvblast:
http://git.videolan.org/gitweb.cgi/dvblast.git/?p=dvblast.git;a=commit;h=074dda7448a974d220d366bdb99b10136dc1a3f5
Ubuntu 15.10 contains usbip package too old to work with usbip v2.0 server (e.g. latest raspbian on RasPI) so you need to compile usbip tool from kernel sources.
You don’t need to go through compiling from source. You may just install package linux-tools-generic:
$ apt-get install linux-tools-generic
This will install precompiled usbip tools into /usr/lib/linux-tools/`uname -r`/:
$ /usr/lib/linux-tools/4.2.0-35-generic/usbip version usbip (usbip-utils 2.0)
$ sudo usbip -l 192.168.1.83 - 192.168.1.83 usbip err: usbip_network.c: 119 (usbip_recv_op_common) recv op_common, -1 usbip err: vhci_attach.c: 202 (query_exported_devices) recv op_common usbip err: vhci_attach.c: 417 (show_exported_devices) query $ usbip -v ** (process:30826): WARNING **: running non-root? usbip 0.1.7 ($Id: vhci_attach.c 42 2007-09-07 12:07:51Z hirofuchi $)