Jetson Wifi issues

#Alternative to wpa_supplicant

Creating connection(important don't remove --):

$ nmcli connection add type wifi con-name "myconname" ifname wlan0 ssid "eduroam" -- wifi-sec.key-mgmt wpa-eap 802-1x.eap ttls
 802-1x.phase2-auth mschapv2 802-1x.identity "USERNAME" 

$ sudo --ask nmcli c up myconname 

 

 

$ ls /etc/NetworkManager/system-connections  #show connections

$ cat /etc/NetworkManager/system-connections/myconname #show file connection 

$ nmcli con show myconname  #show connection detailed

Error 1:

password for '802-1x.identity' not given in 'passwd-file' 

Solution 1:

$ vi mypassfile  #add next line with pass value

802-11-wireless-security.psk:mypassvalue

$ nmcli con up <myconname> passwd-file <mypassfile>



References:

[1] Single connection https://www.linuxfordevices.com/tutorials/ubuntu/connect-wifi-terminal-command-line

[2] https://vessokolev.blogspot.com/2018/08/using-nmcli-to-create-8021x-eap-ttls.html

 

 

 

Python - Creating virtual environments

Install pip if it doesn't exist

$curl -O https://bootstrap.pypa.io/get-pip.py

$python3 get-pip.py --user

$python3 -m pip list

$python3 -m pip install tensorflow --no-cache-dir  #for space issue
 

Error during execution of: python3.8 -m venv myenv

Error: Command '['/path/to/desired/env/bin/python3.8', '-Im', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1.

Solution: Create a virtual environment using a especific python version

$virtualenv --python=$(which python3.7) envtf4p37

 

Proxy list and tools

 

 

Tools:

[1] https://hidemy.name/en/proxy-checker

[2] Listing proxies by country https://www.proxynova.com/proxy-server-list/country-us

FAPESP Brazil

References

[1] https://fapesp.br/valores/bolsasnopais

Jetson Nano and Tensorflow 2.4 in Python3.6

 

References:

[1] https://qengineering.eu/install-tensorflow-2.4.0-on-jetson-nano.html

[2] Lite https://qengineering.eu/install-tensorflow-2-lite-on-jetson-nano.html

[3] Install bazel https://github.com/jkjung-avt/jetson_nano/blob/master/install_bazel-3.1.0.sh

Linux verify disk activities

 

 

$ sudo apt-get install iotop

$ sudo iotop -a
$ sudo iotop -oPa -d 2  #more specific
 

$ iostat  #activity by sda, sdb, etc.
 

jbd2 is a kernel thread that updates the filesystem journal.

 

References:

[1] Reduce firefox disk access https://gist.github.com/gagarine/5cf8f861abe0dd035b7af19e4f691cd8

[2] Monitoring disk activity(htop) https://askubuntu.com/questions/276669/how-to-monitor-disk-activity

Get create/birth date from files

$ stat wakeup.txt  #get the inode

$ df -h wakeup.txt #get device name sdxy

$ sudo debugfs -R 'stat <586205>' /dev/sda1

Output:

Inode: 586205   Type: regular    Mode:  0664   Flags: 0x80000
Generation: 1277687204    Version: 0x00000000:00000001
User:  1000   Group:  1000   Size: 31
File ACL: 0    Directory ACL: 0
Links: 1   Blockcount: 8
Fragment:  Address: 0    Number: 0    Size: 0
ctime: 0x615eed87:dba39c9c  -- Thu Oct  7 09:52:23 2021
atime: 0x64231159:334e6b48  -- Tue Mar 28 13:10:01 2023
mtime: 0x615eed87:dba39c9c  -- Thu Oct  7 09:52:23 2021
crtime: 0x615eed87:dba39c9c -- Thu Oct  7 09:52:23 2021
Size of extra inode fields: 32

 

References:

[1] https://www.linuxshelltips.com/find-file-creation-date/

[2] https://www.baeldung.com/linux/get-file-creation-date

 

Jetson Nano and Tensorflow

 

 

https://developer.download.nvidia.com/compute/redist/jp/v44/tensorflow/

tensorflow 1.15.x to 2.3.x 

https://developer.download.nvidia.com/compute/redist/jp/v45/tensorflow/

tensorflow 1.15.x to 2.5.0 

https://developer.download.nvidia.com/compute/redist/jp/v46/tensorflow/

tensorflow 1.15.x to 2.6.2(requires of h5py==3.1.0 and it requires pkconfig)

https://developer.download.nvidia.com/compute/redist/jp/v461/tensorflow/ 

tensorflow 2.7.x

Compatibility

tensorflow 2.5.0 requires numpy~=1.19.2

Under Python 3.6.9 (protobuf requires Python '>=3.7' but the running Python is 3.6.9)

Under Python 3.6.9 (protobuf requires Python '>=3.7' but the running Python is 3.6.9)


 

Change OS in Jetson

Download image and tool for write img 

https://developer.nvidia.com/embedded/learn/get-started-jetson-nano-devkit#write

dd if=/path/to/your/isofile of=/your/usb/disk bs=8M status=progress