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$ cd

$ cd ..

$ sudo chmod +x FILE

$ sudo apt install htop

$ sudo apt install iotop

$ ifconfig

$ sudo iwlist interface scan | grep SSID

$ sudo iwlist interface freq

wlx74da38c9caa0  20 channels in total; available frequencies :
  Channel 01 : 2.412 GHz
  Channel 02 : 2.417 GHz
  Channel 03 : 2.422 GHz
  Channel 04 : 2.427 GHz
  Channel 05 : 2.432 GHz
  Channel 06 : 2.437 GHz
  Channel 07 : 2.442 GHz
  Channel 08 : 2.447 GHz
  Channel 09 : 2.452 GHz
  Channel 10 : 2.457 GHz
  Channel 11 : 2.462 GHz
  Channel 36 : 5.18 GHz
  Channel 40 : 5.2 GHz
  Channel 44 : 5.22 GHz
  Channel 48 : 5.24 GHz
  Channel 149 : 5.745 GHz
  Channel 153 : 5.765 GHz
  Channel 157 : 5.785 GHz
  Channel 161 : 5.805 GHz
  Channel 165 : 5.825 GHz
  Current Frequency:2.437 GHz (Channel 6)

laptop $ scp hostname:/path/to/file.txt /path/where/you/whish/.

laptop $ scp hostname:/path/to/file.txt .