Hardware & Resources

Commands

inxi	(Not on all systems) Comprehensive hardware and system information.
lshw	Hardware details
uname -m	Machine architecture
uname -v	Kernel version
uname -o	OS
uname -i	Hardware platform
lscpu	CPU
cat /proc/cpuinfo	CPU
uname -p	Processor type
cat /proc/meminfo	Memory
free -m	Displays free and used memory in megabytes.
vmstat	Virtual memory
df -h	Disk space usage
df -h	Disk space usage in human-readable format.
ncdu	Disk usage analyzer
lsblk	List block devices
dmidecode	Info from SMBIOS/DMI tables (motherboard, BIOS, memory, etc.) (requires root privileges).
fdisk -l	Lists disk partitions (requires root privileges).
lspci	Lists all PCI devices.
lsusb	Displays USB devices.
ip addr	Shows network interface information and IP addresses.
du	Estimate file and directory space usage.

Solaris

psrinfo -v	Displays processor information.
modinfo -c	Lists all the kernel modules.

File Locations

Note: /proc and /sys provide real-time data direct from the kernel and can't be modified by a user. Access to certain files within these directories may require sudo privileges.

/proc

/proc/cpuinfo	Information about CPUs.
/proc/meminfo	Memory-related information.
/proc/loadavg	Load average statistics.
/proc/uptime	System uptime.
/proc/version	Kernel version.
/proc/net/	Network-related information.
/proc/mounts	Mounted filesystems.
/proc/devices	Available devices.
/proc/modules	Loaded kernel modules.
/proc/interrupts	IRQ usage.

/sys

/sys/class/hwmon/	Hardware monitoring sensors.
/sys/block/	Block devices (e.g., hard drives).
/sys/class/net/	Network interfaces.

/dev

Contains device files representing hardware devices on the system. While these files can be read from and written to, their contents are managed directly by the kernel and cannot be arbitrarily modified by users.

dmesg

The kernel message buffer, viewable using the dmesg command, contains logs of system events and hardware messages. It's a read-only view of kernel activity and cannot be edited directly.