How do I prevent the spam mail coming to my mailbox using filter. are there any commands that I have to give?
Go to keyword spam settings, or better yet on the bottom of your email box there is a blue underlined word that says spam filtering. Either way it sets up a spam folder for all unwanted mail. To get there just click on spam folder at bottom of mailbox.
A Unix filter is a command pattern that allows the output of one command to be "piped" into the input of the next command. Commands like 'ls' which list a directory are not filters since they only generate output. Filter examples are grep, sed, sort, uniq, awk. Commands in Unix are usually filters unless they only create output, like 'ls', 'vi', etc.
Internet filters are used to prevent people from surfing where the administrator does not want them to go. For example, they may install a filter at work to prevent "Cyberloafing". Or a parent may want to install and internet filter in order to keep their kids focused on homework instead of surfing the web. Also, filters are used to block pornography.
Why is there dirt coming out of the jets whenever you turn the cartridge filter on after cleaning it?
The pore size of a filter allows it to prevent the movement of certain particles depending on the size of those particles. The smaller the size of the pores, the smaller the set of particles which can pass the filter. A filter with 0.2 pore size can prevent most forms of bacteria and some very large viruses from passing through the filter since bacteria tend to range from about 0.1 micrometers to 600 micrometers. Many…