Which package managers would you use on centos machine
Centos makes use of RPM and YUM
Use an rpm command and find out the exact package name for wget installed in this server
$ rpm -qa |grep wget
To install a package for firefox browser that has been downloaded under /home/bob in the system. Caution: It might fail due to failed dependencies
$ sudo rpm -ivh /home/bob/firefox-68.6.0-1.el7.centos.x86_64.rpm
To install a package for firefox browser along with its dependencies
$ sudo yum install firefox -y
To check how many software repositories are configured for YUM in the system
$ sudo yum repolist
To check which package provides tcpdump command
$ sudo yum provides tcpdump