sudo !!
Execute the above command with administrator privileges:w !sudo tee %
Save editing file without permission in Vimhtop
,iotop
view process, memory and IO loadhistory
View command historytmux
window management toolsystemd-analyze
See the boot speed on a system using systemdfortune
This command will randomly output funny words, such as famous quotes or jokes. The Chinese version is fortun-zhcmatrix
Output endless strings from top to bottom, similar to the matrix effect in <<The Matrix>>.toilet
Output WordArt composed of ASCII codes.cal
Print the calendar for March 2018: cal 3 2018lolcat
Make characters colored: ls | lolcat
Some interesting software tool notes under Ubuntu
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