Kernel starts up very slowly on Linux

V 12.1.1, starting a kernel, e.g. by entering wolframscript in the shell, takes an unexpectedly long time (~5 min, the time elapsed between pressing Enter and the showing-up of In[1] := ); but the same operation for V 12.0 takes merely ~3 sec.

I wonder if I am the only one experiencing this.

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Update

Also, inspired by @Ordinaryusers68 ‘s answer, I find these two posts:

• Is there a way to turn off paclet updating altogether? [duplicate]
  
• Paclets updating awareness and tracking

where, an option -nopaclet is mentioned when starting the kernel.