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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