Tool tests on the fast track
FPING 3.5
Powerful Ping alternative
Source: http://fping.org
License: GPL
Alternatives: Ping
Fping sends ICMP packets to a computer and evaluates the response times. Because the tool relies on raw sockets, it requires root privileges. If you want IPv6 support, you need to enable this when compiling the source code. The executable is then named fping6
rather than fping
.
Unlike legacy Ping, the Fping can ping several systems at the same time, either by typing the addresses in manually or by passing them in as a file with the -f
parameter. To test all computers on a subnet, -g
expects the network address and subnet mask as options. A combination of -a
and -q
tells Fping to show you only the accessible systems and hide the error messages from unreachable hosts.
Just like Ping, Fping sends 56-byte data packets. The -b
optin tells the program to reduce packet size to 12 bytes or increase it to 64KB. If you prefer to see the name of the target computer instead of the IP addresses in the output, you can enable DNS lookup with -d
.
Fping does not wait for a response or a timeout after sending an ICMP packet; rather, it uses a round-robin approach and moves directly to the next host. Once the tool has received a response, it removes the host from the list and generates output. By default, it tries to reach a system three times, but -r
lets you increase the number of attempts. The -l
parameter enables an infinite loop; -s
shows a statistical evaluation.
Fping not only pings multiple hosts simultaneously, it outputs extra details.
LNAV 0.5.0
Logfile Navigator
Source: http://tstack.github.io/lnav
License: BSD revised
Alternatives: MultiTail
If you need to check logfiles on a large-scale server for specific entries, it is often hard to see the forest for the trees. LNAV helps you thin out the information thicket. The curses-based tool prepares the contents of logfiles and highlights timestamps, log levels, and other messages. It understands and analyzes /var/log/syslog
, Apache access logs, Strace, and other protocols that include timestamps.
LNAV color highlights important information. For example, it marks warnings in yellow and errors in red. The highlight
command followed by a search pattern lets you highlight other entries. You cannot specify the color, however; LNAV chooses the colors itself and changes its choice each time you call it. Filters and search functions help sort the information. The use of regular expressions is possible.
SQL statements can also be used to sort the output. LNAV uses the virtual table function in SQLite 3 to produce rudimentary tables, and you can create your own tables, if needed. Examples using SQL, a collection of integrated LNAV commands, and keyboard shortcuts are available from online help; typing ?
displays the help on your screen. The developers have based the shortcuts on common tools. For example, a slash (/
) introduces a text search; a colon (:
) changes to command mode, and a semicolon (;
) changes to SQL mode.
LNAV lives up to its name and helps users navigate logfiles. The tool thus facilitates logfile analysis and evaluation. Sophisticated filtering and search capabilities round out the package.
TOMB 1.4
Creating Encrypted File Containers
Source: http://www.dyne.org/software/tomb
License: GPLv3
Alternatives: Cryptmount, TrueCrypt
Tomb creates and manages encrypted containers in the shell. The tool does not use its own algorithms to do this but acts as a wrapper for proven tools such as cryptsetup, dd
, and mkfs
. Tomb also requires the Z shell. Some commands require root privileges.
Users can create containers in three steps. First, you can call Tomb with the dig
parameter to create the container. Options are available for defining the size in megabytes and the name. Second, entering forge
generates a keyfile that contains the encryption password. Finally, the lock
parameter initializes the container file and locks it with the generated key.
Earlier versions of Tomb also supported the create
parameter, which automates all three phases. Although the current version still supports the command, the help and man pages no longer mention it.
The open
command lets users open Tomb containers, specifying any additional mount options after -o
. By default, the tool mounts the container below /media
. The list
parameter helps determine which containers are currently open.
Other commands, such as index
or search
, will index all the data in a specified container, thus enabling searching. More information and application examples are provided by the man page.
Tomb generates encrypted containers in a few steps at the command line and mounts them on the filesystem.
« Previous 1 2
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs
Subscribe to our ADMIN Newsletters
Support Our Work
Linux Magazine content is made possible with support from readers like you. Please consider contributing when you’ve found an article to be beneficial.
News
-
Canonical Bumps LTS Support to 12 years
If you're worried that your Ubuntu LTS release won't be supported long enough to last, Canonical has a surprise for you in the form of 12 years of security coverage.
-
Fedora 40 Beta Released Soon
With the official release of Fedora 40 coming in April, it's almost time to download the beta and see what's new.
-
New Pentesting Distribution to Compete with Kali Linux
SnoopGod is now available for your testing needs
-
Juno Computers Launches Another Linux Laptop
If you're looking for a powerhouse laptop that runs Ubuntu, the Juno Computers Neptune 17 v6 should be on your radar.
-
ZorinOS 17.1 Released, Includes Improved Windows App Support
If you need or desire to run Windows applications on Linux, there's one distribution intent on making that easier for you and its new release further improves that feature.
-
Linux Market Share Surpasses 4% for the First Time
Look out Windows and macOS, Linux is on the rise and has even topped ChromeOS to become the fourth most widely used OS around the globe.
-
KDE’s Plasma 6 Officially Available
KDE’s Plasma 6.0 "Megarelease" has happened, and it's brimming with new features, polish, and performance.
-
Latest Version of Tails Unleashed
Tails 6.0 is based on Debian 12 and includes GNOME 43.
-
KDE Announces New Slimbook V with Plenty of Power and KDE’s Plasma 6
If you're a fan of KDE Plasma, you'll be thrilled to hear they've announced a new Slimbook with an AMD CPU and the latest version of KDE Plasma desktop.
-
Monthly Sponsorship Includes Early Access to elementary OS 8
If you want to get a glimpse of what's in the pipeline for elementary OS 8, just set up a monthly sponsorship to help fund its continued existence.