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# Hardware & Resources

## <mark style="color:red;">Commands</mark>

<table data-header-hidden data-full-width="true"><thead><tr><th width="259">Command</th><th>Description</th></tr></thead><tbody><tr><td><mark style="color:yellow;"><code>inxi</code></mark></td><td>(Not on all systems) Comprehensive hardware and system information.</td></tr><tr><td><mark style="color:yellow;"><code>lshw</code></mark></td><td>Hardware details</td></tr><tr><td><mark style="color:yellow;"><code>uname -m</code></mark></td><td>Machine architecture</td></tr><tr><td><mark style="color:yellow;"><code>uname -v</code></mark></td><td>Kernel version</td></tr><tr><td><mark style="color:yellow;"><code>uname -o</code></mark></td><td>OS</td></tr><tr><td><mark style="color:yellow;"><code>uname -i</code></mark></td><td>Hardware platform</td></tr><tr><td><mark style="color:yellow;"><code>lscpu</code></mark></td><td>CPU</td></tr><tr><td><mark style="color:yellow;"><code>cat /proc/cpuinfo</code></mark></td><td>CPU</td></tr><tr><td><mark style="color:yellow;"><code>uname -p</code></mark></td><td>Processor type</td></tr><tr><td><mark style="color:yellow;"><code>cat /proc/meminfo</code></mark></td><td>Memory</td></tr><tr><td><mark style="color:yellow;"><code>free -m</code></mark></td><td>Displays free and used memory in megabytes.</td></tr><tr><td><mark style="color:yellow;"><code>vmstat</code></mark></td><td>Virtual memory</td></tr><tr><td><mark style="color:yellow;"><code>df -h</code></mark></td><td>Disk space usage</td></tr><tr><td><mark style="color:yellow;"><code>df -h</code></mark></td><td>Disk space usage in human-readable format.</td></tr><tr><td><mark style="color:yellow;"><code>ncdu</code></mark></td><td>Disk usage analyzer</td></tr><tr><td><mark style="color:yellow;"><code>lsblk</code></mark></td><td>List block devices</td></tr><tr><td><mark style="color:yellow;"><code>dmidecode</code></mark></td><td>Info from SMBIOS/DMI tables (motherboard, BIOS, memory, etc.) (requires root privileges).</td></tr><tr><td><mark style="color:yellow;"><code>fdisk -l</code></mark></td><td>Lists disk partitions (requires root privileges).</td></tr><tr><td><mark style="color:yellow;"><code>lspci</code></mark></td><td>Lists all PCI devices.</td></tr><tr><td><mark style="color:yellow;"><code>lsusb</code></mark></td><td>Displays USB devices.</td></tr><tr><td><mark style="color:yellow;"><code>ip addr</code></mark></td><td>Shows network interface information and IP addresses.</td></tr><tr><td><mark style="color:yellow;"><code>du</code></mark></td><td>Estimate file and directory space usage.</td></tr></tbody></table>

### <mark style="color:purple;">Solaris</mark>

<table data-header-hidden data-full-width="true"><thead><tr><th width="259">Command</th><th>Description</th></tr></thead><tbody><tr><td><mark style="color:yellow;"><code>psrinfo -v</code></mark></td><td>Displays processor information.</td></tr><tr><td><mark style="color:yellow;"><code>modinfo -c</code></mark></td><td>Lists all the kernel modules.</td></tr></tbody></table>

## <mark style="color:red;">File Locations</mark>

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.

### <mark style="color:purple;">/proc</mark>

<table data-header-hidden><thead><tr><th width="225">Path</th><th>Description</th></tr></thead><tbody><tr><td>/proc/cpuinfo</td><td>Information about CPUs.</td></tr><tr><td>/proc/meminfo</td><td>Memory-related information.</td></tr><tr><td>/proc/loadavg</td><td>Load average statistics.</td></tr><tr><td>/proc/uptime</td><td>System uptime.</td></tr><tr><td>/proc/version</td><td>Kernel version.</td></tr><tr><td>/proc/net/</td><td>Network-related information.</td></tr><tr><td>/proc/mounts</td><td>Mounted filesystems.</td></tr><tr><td>/proc/devices</td><td>Available devices.</td></tr><tr><td>/proc/modules</td><td>Loaded kernel modules.</td></tr><tr><td>/proc/interrupts</td><td>IRQ usage.</td></tr></tbody></table>

### <mark style="color:purple;">/sys</mark>

<table data-header-hidden><thead><tr><th width="228">Path</th><th>Description</th></tr></thead><tbody><tr><td>/sys/class/hwmon/</td><td>Hardware monitoring sensors.</td></tr><tr><td>/sys/block/</td><td>Block devices (e.g., hard drives).</td></tr><tr><td>/sys/class/net/</td><td>Network interfaces.</td></tr></tbody></table>

### <mark style="color:purple;">/dev</mark>

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.

### <mark style="color:purple;">dmesg</mark>

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.