Iftop does for network usage what top does for CPU usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts.

The Stress Terminal UI displays graphs of the CPU frequency, utilization, temperature and power.

Btop++ provides unified monitoring of CPU, memory, network and processes.

Nmap ("Network Mapper") is a network discovery and security auditing tool. It is also useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. It also provides an advanced netcat implementation (ncat), a utility for comparing scan results (ndiff), and a packet generation and response analysis tool (nping).

daemontools is a collection of tools for managing UNIX services.

MASSCAN is an asynchronous TCP port scanner. It can detect open ports, and also complete the TCP connection and interact with the remote application, collecting the information received.

Dmidecode reports information about your system's hardware as described in your system BIOS according to the SMBIOS/DMI standard. This typically includes system manufacturer, model name, serial number, BIOS version, asset tag as well as a lot of other details of varying level of interest and reliability depending on the manufacturer. This will often include usage status for the CPU sockets, expansion slots (e.g. AGP, PCI, ISA) and memory module slots, and the list of I/O ports (e.g. serial, parallel, USB).

The Router Advertisement Daemon (radvd) is run on systems acting as IPv6 routers. It sends Router Advertisement messages specified by RFC 2461 periodically and when requested by a node sending a Router Solicitation message. These messages are required for IPv6 stateless autoconfiguration.

AIDE (Advanced Intrusion Detection Environment) is a file and directory integrity checker. It creates a database from the regular expression rules that it finds from its configuration files. Once this database is initialized it can be used to verify the integrity of the files. It has several message digest algorithms that are used to check the integrity of files. All of the usual file attributes can be checked for inconsistencies.

stress-ng stress-tests a computer system by exercising both physical subsystems as operating system kernel interfaces. It can stress the CPU, cache, disk, memory, socket and pipe I/O, scheduling, and much more, in various selectable ways. This can trip hardware issues such as thermal overruns as well as operating system bugs that occur only when a system is being thrashed hard.

You can also measure test throughput rates, which can be useful to observe performance changes across different operating system releases or types of hardware. However, stress-ng is not a benchmark. Use it with caution: some of the tests can make poorly designed hardware run dangerously hot or make the whole system lock up.

Compared to its inspiration, stress, stress-ng offers many additional options such as the number of bogo operations to run, execution metrics, verification of memory and computational operations, and considerably more stress mechanisms.

doctl provides a unified command line interface to the DigitalOcean API.

The GNU Shepherd is a daemon-managing daemon, meaning that it supervises the execution of system services, replacing similar functionality found in typical init systems. It provides dependency-handling through a convenient interface and is based on GNU Guile.

This package provides tools to manage clients of the Logitech Unifying Receiver.

This package provides an implementation of the MAC-Telnet protocol used by RouterOS devices. It provides the following commands:

macping

Ping RouterOS devices or mactelnetd hosts.

mactelnetd

MAC-Telnet daemon.

mactelnet

MAC-Telnet client.

mndp

Discover other RouterOS devices or mactelnetd hosts.

The GNU Shepherd is a daemon-managing daemon, meaning that it supervises the execution of system services, replacing similar functionality found in typical init systems. It provides dependency-handling through a convenient interface and is based on GNU Guile.

This is htop, an interactive process viewer. It is a text-mode application (for console or X terminals) and requires ncurses.

This package provides a graphical console greeter for greetd. It doesn't need a Wayland compositor to be used.

Atop is an ASCII full-screen performance monitor for Linux that is capable of reporting the activity of all processes (even processes have finished during the monitoring interval), daily logging of system and process activity for long-term analysis, highlighting overloaded system resources by using colors, etc. At regular intervals, it shows system-level activity related to the CPU, memory, swap, disks (including LVM) and network layers, and for every process (and thread) it shows e.g. the CPU utilization, memory growth, disk utilization, priority, username, state, and exit code.

pscircle visualizes Linux processes in the form of a radial tree.

Bfs is a variant of the UNIX find command that operates breadth-first rather than depth-first. It is otherwise compatible with many versions of find, including POSIX, GNU, and *BSD find.

This package contains tools for Allwinner devices:

1. sunxi-fexc, bin2fex, fex2bin: Compile a textual description of a board (.fex) to a binary representation (.bin).

2. sunxi-fel: Puts an Allwinner device into FEL mode which makes it register as a special USB device (rather than USB host). You can then connect it to another computer and flash it from there.

3. sunxi-nand-part: Partitions NAND flash.

4. sunxi-bootinfo: Reads out boot0 and boot1 (Allwinner bootloader) parameters.

5. sunxi-pio: Sets GPIO parameters and oscillates a GPIO in order to be able to find it.

6. sunxi-meminfo: Prints memory bus settings.

7. sunxi-nand-image-builder: Prepares raw NAND images.

This is the user-space component to the Linux auditing system, which allows logging of system calls made by user-land processes. auditd is responsible for writing audit records to the disk. Viewing the logs is done with the ausearch or aureport utilities. Configuring the audit rules is done with the auditctl utility.

This package provides programs that transfer files using the XMODEM/YMODEM/ZMODEM file transfer protocols.

Nmon is yet another system monitor useful in systems administration, debugging, tuning, and benchmarking.

The configurable ncurses interface displays all the classic resource usage statistics (CPU, memory, network, disk, ...) as real-time graphs or numbers. It can also list the processes responsible in a top-like table.

A less common nmon feature is its ability to create highly detailed log files in CSV format. These can be imported into spreadsheets or fed straight into an RRD using rrdtool for further analysis, or to create colourful graphs.