Briefly explain what each of the following commands does.

ls .. li

ls /usr/bin/c*

ls -d /usr/*

ls -ld /var

ls -A ../../*

ls -l /

ls /bin/[ag]*

ls /[abd]*

ls /[a-h]*

ls ./Do*

ls ~ check home directory.

ls -ld ~/Downloads

ls a?a

ls [a-c]*

ls [b, j, r]*

ls *[o,u]*

ls rc?*

ls *d

ls *.d

ls [b-c]*a

ls [^a-i]*