linux
Create user on sudoers and add key on Linux
Setting alternatives
For instance, for python3:
$ sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.6 1
$ sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.7 2
Selecting from alternatives:
$ sudo update-alternatives --config python3
Symbolic links
Creating: $ ln -s FILE LINK
Hardware and software info
To get the linux release details:
$ lsb_release -a
Kernel, network and machine main info
$ uname -a
List cpu info
$ lscpu
Memory
$ free
or$ cat /proc/meminfo
Usb controllers info
$ lsusb
File system info
$ sudo fdisk -l
dd command -convert and copy
To format the volume
$ sudo dd bs=4M if=/dev/zero of=/dev/device oflag=sync status=progress
To copy an image to the volume
$ sudo dd bs=4M if=/path/file.img of=/dev/device oflag=sync status=progress
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