commandline session $ 4.2.36 4 501—> which $ 4.2.36 5 502—> which -h Illegal option -h Usage: /usr/bin/which [-a] args $ 4.2.36 6 503—> which ls /bin/ls $ 4.2.36 7 504—> which -a ls /bin/ls $ 4.2.36 8 505—> which -a top /usr/bin/top $ 4.2.36 9 506—> which top /usr/bin/top $ 4.2.36 10 507—> echo …