CLI information programs

Network

Network logging
Network scanning
Other Network commands

USB

Commands which can show info about USB devices

Command	Description	Example	Output	Remark
bonnie++	Benchmark			Writes huge files, maybe multiple times, to disk
dmseg	Boot info
lsblk	list block devices	lsblk -a -f -l -o NAME,MODEL,TRAN \| grep usb	sdd USB_Flash_Disk usb	Has a RM (ReMovable) column. lsblk -S \| grep usb shows, of only usb devices, NAME (device) HCTL TYPE (disk type) VENDOR (interface type?) MODEL (name) REV (revision) TRAN (bus type)
lshw	Infomation about the computer			Use lshw -short -C disk to show all block devices with their size in the name
lsusb	Show info about all usb devices			No link made to a block device
usb-devices				No link made to a block device

Other

Command	Description	Example	Output	Remark
arch	Print system architecture	arch	x86_64
armbianmonitor	Has several monitor and upload options	armbianmonitor -m Output: CPU speed, load, temperature and several others	Warning: the -u option uploads dmesg info to sprunge.us . Probably does the -d option something similar	This command has privacy implications!
atop	Monitor for system resources and process activity
atsar	system activity report
blkid	Show info about all drives
dmidecode	Infomation about the computer
dstat	Versatile tool for generating system resource statistics
dpkg-architecture	cpu & OS info	dpkg-architecture	18 lines of info
echo $HOSTTYPE	Print system architecture	echo $HOSTTYPE	x86_64
free	Show memory and swap information and usage
htop	Show CPU and memory usage
id	Show user id	id -u user
iftop	Display bandwidth usage on an interface by host
iotop	Simple, top like, I/O monitor showing harddisk read and write throughput	iotop --only --accumulated --user=user
ips	Intelligent process status			Like ps
itop	Simple, top like, interrupt load monitor
journalctl	Query the systemd journal
linux-cpupower	Package containing cpupower (Shows and sets processor power related values)), turbostat (Report processor frequency and idle statistics) and x86_energy_pref_policy (x86_energy_pref_policy is for some Intel processors only)
lnav	ncurses log file viewer			Nice
logcheck	Spot problems and security violations in logfiles	sudo -u logcheck logcheck -o -t		Sends the output standard to e-mail. The example command did not work for us
logwatch	System log analyzer and reporter			Sends the output standard to e-mail
lsblk	Show all drives in a tree
lshw	Infomation about the computer
mountpoint	See if a directory or file is a mountpoint
mpstat	Report processors related statistics	mpstat --dec=1 -P ALL. mpstat 300 500 > ~/mpstat.log & (log every 5 minutes, 500 times to a logfile, do it in the background)
ncdu	NCurses Disk Usage
nmon	Systems administrator, tuner, benchmark tool
powertop	Power consumption and power management diagnosis tool
ps	Report a snapshot of the current processes	ps -p <pid> -o %cpu,%mem,cmd
read-edid	Information gathering tool for VESA PnP monitors
report-hw	Report system hardware info			Incorporates info from other commands
sar	Collect, report, or save system activity information		We got: “Cannot open /var/log/sysstat/sa25: No such file or directory. Please check if data collecting is enabled” To be solved
service	Run a System V init script	service --status-all	[ + ]: running, [ - ]: stopped, [ ? ] no status command
smartctl	Show S.M.A.R.T information of a harddisk drive	smatrtctl -a /dev/sda	A lot of data	You do not need to install all the other pacakges shown in aptitude. Unselect them and just install smartmontools if you want smartctl
stat	Display file or file system status	stat --format=%A somefile.txt	-rw-r--r--
s2u	Monitors messages through D-BUS taking appropraite actions
top	Show CPU and memory usage	See below this table
trend	General-purpose efficient trend graph
uname	Print system information	uname -r	3.2.0-4-amd64	Kernelversion and others
vmstat	Reports information about processes, memory, paging, block IO, traps, disks and cpu activity
w
wait	Wait for job completion and return exit status			wait --help for more info. No man page nor whatis info
watch	Watch the output of a command	watch --color --differences --interval 5 “df -h \| grep sda1”	Watch the disk usage of /dev/sda1 with an interval of 5 secondes and highlight the differences with the previous result
whatis
whereis
which
who
xdpyinfo	Show screeninfo
xfce4-about	Show the version of xfce
xrandr	Show screeninfo
CPU
cat /proc/cpuinfo
lscpu
cpuid				Does not seem to show the CPUID. Shows a lot of other information
dmidecode --type processor
lshw -C CPU
lscpu
hardinfo

Examples

echo $(date;uptime;echo "Temperatuur: ";sensors | grep "CPUTIN" | tr --squeeze-repeats [:space:] | cut -d " " -f 2 | cut -d \+ -f 2 | cut -d \. -f 1; echo " °C")

top:

load=$(top -b -n1 | grep "Cpu(s)" | tr ',' '.' | awk '{printf "%0.1f", $2 + $4}');echo "Load: $load"

Get your IP address

alias ipaddress='wget --quiet --output-document=/tmp/ipaddress.html https://myip.nl && unhtml /tmp/ipaddress.html |  grep "IP Address" | sed "s/)/) /"'

Get the RAM size in bytes

Use one of:

free --bytes | grep Mem | tr -s " " | cut -d " " -f 2
echo $(bc <<< $(vmstat --stats | grep "total memory" | tr -s " " | cut -d " " -f 2)*1000)
echo $(bc <<< $(cat /proc/meminfo | grep MemTotal | tr -s " " | cut -d " " -f 2)*1000)

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