How to remove duplicate lines in a file?

Question

linux

There is a txt file with the history of terminal commands,

673  sudo mysql-workbanch
  674  sudo mysql-workbench
  675  poweroff
  676  sudo mysql -u root -p
  677  sudo mysql-workbench
  678  poweroff
вывод sort -u

How can I remove duplicate entries? sort -u is not suitable, there are two values ​​\u200b\u200bthe number and the command itself, sorting is not needed, it is necessary that duplicate lines be deleted and deleted along with the number

Answer 1

If a "manual" solution is suitable, then you can convert the test one to csv.
1. Replacing two spaces with ;
2. Change the resolution of the .csv file
3. Compare 2 columns in Libre Office Calc and remove repetitions
In principle, quickly done) And sorting and numbers are saved.

Answer 2

If sorting is not important, then as an option:
sort history.txt | uniq -u

Answer 3

recipe