
9
Boot Single-User Mode This is kind of like safe-mode in Windows – it skips a lot of startup files and
services:
1. Power on the box
2. At the boot screen for Grub, select the version you want to boot and
type e for edit
3. Select the line that starts with kernel and type e for edit
4. Go to the end of the line and type single
5. Hit [ENTER]
6. Now type b for boot
tcpdump Dump traffic with a specific host IP address to a file:
tcpdump –i interface –w dump_file_name host IP_address
example:
tcpdump –i eth1 –w dump host 208.159.105.98
Then read the file that was created:
tcpdump –r dump
tcpflow Download from http://dries.ulyssis.org/rpm/packages/tcpflow/info.html
tcpflow will capture and save to individual files actual data streams
Examples:
tcpflow –s
tcpflow –s port http
tcpflow –s port http or https or smtp or 3128
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