minor

archlinux.md

@@ -75,7 +75,10 @@ sudo mkinitcpio -p linux
 ### git use credential store
 https://gist.github.com/maelvls/79d49740ce9208c26d6a1b10b0d95b5e
 well, no:
+```
+yay seahorse libgnome-keyring
 git config --global credential.helper /usr/lib/git-core/git-credential-gnome-libsecret
+```
 
 ### gnome thumbnail raw picture
 https://support.system76.com/articles/fix-raw-image-previews/

badge.md

@@ -32,10 +32,11 @@ the badge is made by badge.team. currently there a no documentation. REV2 is on
  - GH12E 535MB8 {AP2114 LDO https://www.diodes.com/assets/Datasheets/AP2114.pdf} SOT23, 3.3V
  - Blue Taiyang 201912 375080 1500mAh 3.7V LiPo, protected by S8261 ( https://s.alicdn.com/@sc01/kf/Hee7ed3ee91a14761aedd3fb3e48ce273l/221933125/Hee7ed3ee91a14761aedd3fb3e48ce273l.jpg )+ JST PH 2P connector?
  - NXP PCA9555 I2C GPIO expander
- - CC1200 + pcb antenna and SMA solder point, 2 pogo pin test points 
+ - CC1200 + pcb antenna and SMA solder point, 2 pogo pin test points
+     -  Frequencies: 137-158.3, 164-190, 205-237.5, 274-316.6, 410-475, 820-950
  - vibrator (?)+ JST PH 2P connector?
 
-### shitty addon
+### 'shitty addon'
 It is glowing lighty green. the pcb looks like an anglerfish
 - attiny85
 - RGB LED

get_info.py

@@ -0,0 +1,70 @@
+# Copyright (c) 2018 Yubico AB
+# All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or
+#   without modification, are permitted provided that the following
+#   conditions are met:
+#
+#    1. Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#    2. Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+"""
+Connects to each attached FIDO device, and:
+    1. If the device supports CBOR commands, perform a getInfo command.
+    2. If the device supports WINK, perform the wink command.
+"""
+
+from fido2.hid import CtapHidDevice, CAPABILITY
+from fido2.ctap2 import Ctap2
+
+try:
+    from fido2.pcsc import CtapPcscDevice
+except ImportError:
+    CtapPcscDevice = None
+
+
+def enumerate_devices():
+    for dev in CtapHidDevice.list_devices():
+        yield dev
+    if CtapPcscDevice:
+        for dev in CtapPcscDevice.list_devices():
+            yield dev
+
+
+for dev in enumerate_devices():
+    print("CONNECT: %s" % dev)
+    print("Product name: %s" % dev.product_name)
+    print("Serial number: %s" % dev.serial_number)
+    print("CTAPHID protocol version: %d" % dev.version)
+
+    if dev.capabilities & CAPABILITY.CBOR:
+        ctap2 = Ctap2(dev)
+        info = ctap2.get_info()
+        print("DEVICE INFO: %s" % info)
+    else:
+        print("Device does not support CBOR")
+
+    if dev.capabilities & CAPABILITY.WINK:
+        dev.wink()
+        print("WINK sent!")
+    else:
+        print("Device does not support WINK")
+
+    dev.close()

linux_perf_problems.md

@@ -1,4 +1,9 @@
 # debug perfomance problems 
 https://netflixtechblog.com/linux-performance-analysis-in-60-000-milliseconds-accc10403c55
 
-introduction to ebpf: https://www.brendangregg.com/ebpf.html
+introduction to ebpf: https://www.brendangregg.com/ebpf.html
+
+RAM usage splitted by iomem (https://github.com/madrisan/linux-iomem/blob/master/iomem.sh)
+```
+cat /proc/iomem | tr [a-z] [A-Z] | while IFS='-: ' read AD1 AD2 REST; do echo "$(( $(echo "obase=10;ibase=16; ( $AD2 -AD1 ) " | bc) >> 20))MB for $REST"; done | sort -h
+```