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

Testing SPAM filtering from shell

echo "XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X" | mail -s Spam_test danman@example.com

Disable filtering for 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"],
);

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.

UPDATE 19. 04. 2016:

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)

Non-working usbip installed from usbip package

$ 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 $)

Continue reading usbip-utils 2.0 on Ubuntu →

Creating volume

/etc/drbd.d/raid10.res
resource raid10 {

  protocol B;

  on hostname1 {
    device    /dev/drbd1;
    disk      /dev/raid10_vg/drbd;
    address   [localIP]:7789;
    meta-disk internal;
  }
  on hostname2 {
    device    /dev/drbd1;
    disk      /dev/raid10-vg/drbd;
    address   [localIP]:7789;
    meta-disk internal;
  }
}

Both nodes:

drbdadm create-md [resource]
drbdadm up [resource]

Primary node:

drbdadm primary --force [resource]

cat /proc/drbd
version: 8.4.3 (api:1/proto:86-101)
srcversion: 6551AD2C98F533733BE558C

 1: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent B r-----
    ns:7552704 nr:0 dw:0 dr:7552936 al:0 bm:460 lo:47 pe:12 ua:47 ap:0 ep:1 wo:f oos:97303516
    [>...................] sync'ed:  7.3% (95020/102396)Mfinish: 0:15:29 speed: 104,672 (96,804) K/sec

Resize

Both nodes:

lvresize /dev/raid10-vg/drbd -L+100G
  Extending logical volume drbd to 200.00 GiB
  Logical volume drbd successfully resized

resize with resync:

drbdadm resize [resource]

resize without resync (added clean space):

drbdadm -- --assume-clean resize [resource]

Resize filesystem:

resize2fs /dev/drbd1

Fix splitbrain

slave:

drbdadm secondary all
drbdadm connect --discard-my-data all

master:

drbdadm connect all