In Unix you can pipe the output of a command into the GREP command in order to only display the lines that contain a required string. This is means you don’t have to scroll through pages of output to find the bit you’re interested in. The DOS equivalent of GREP is FIND:
Searches for a text string in a file or files. FIND [/V] [/C] [/N] [/I] [/OFF[LINE]] "string" [[drive:][path]filename[ ...]] /V Displays all lines NOT containing the specified string. /C Displays only the count of lines containing the string. /N Displays line numbers with the displayed lines. /I Ignores the case of characters when searching for the string. /OFF[LINE] Do not skip files with offline attribute set. "string" Specifies the text string to find. [drive:][path]filename Specifies a file or files to search. If a path is not specified, FIND searches the text typed at the prompt or piped from another command.
this can be useful with the netstat command:
netstat -ano | find /i ":80"
or when viewing the DNS cache:
ipconfig /displaydns | find /i "google"
Although that isn’t ideal since the output of ipconfig isn’t really formatted to play nicely with the find command.