commandline session $ 4.2.36 2 501—> echo BASH_VERSINFO[0] BASH_VERSINFO[0] $ 4.2.36 3 502—> echo $BASH_VERSINFO[0] 4[0] $ 4.2.36 4 503—> echo $BASH_VERSINFO 4 $ 4.2.36 5 504—> echo $BASH_VERSINFO[1] 4[1] $ 4.2.36 6 505—> echo BASH_VERSINFO[1] BASH_VERSINFO[1] $ 4.2.36 7 506—> echo “BASH_VERSINFO[1]” BASH_VERSINFO[1] $ 4.2.36 8 507—> echo BASH_VERSINFO(1) bash: syntax error near unexpected …