By Ellen Siever
This can be relatively a superb reference publication for newcomers in addition to complex. while you're new to Linux and seeking out a e-book that teaches you Linux by way of explaining issues, this ebook isn't for you and also you have to examine different titles.
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Extra resources for Linux in a Nutshell, 5th Edition
Masquerading can act as additional protection, hiding the very existence of a network. It also saves the trouble and expense of obtaining multiple IP addresses. IP firewalling and masquerading are implemented with netfilter, also known as iptables. Earlier Linux kernels used ipchains or ipfwadm, which will not be covered here. Unlike the older tools, the facilities provided by netfilter are designed to be extensible; if there is some function missing from the implementation, you can add it. The packet filtering facilities provide built-in rule sets.
Shutdown Shut down system. telinit Change the current runlevel. uptime Display uptimes of local machines. 13. System Activity and Process Management A number of additional commands in Chapter 3 are particularly useful in controlling processes, including kill, killall, pidof, ps, and who. Command Action fuser Identify processes using file or filesystem. renice Change the priority of running processes. top Show most CPU-intensive processes. vmstat Print virtual-memory statistics and process statistics.
Options -b, --battery Display battery information. -B, --without-battery Do not display battery information. -t, --thermal Display temperature information. 52 53 -T, --without-thermal Do not display temperature information. -a, --ac-adapter Show whether the AC adapter is connected. -A, --without-ac-adapter Do not show information about the AC adapter. -V, --everything Show all information on every device. -s, --show-empty Display information even on devices that are not available or not installed, such as empty slots for extra batteries.