Quick System Info Report

monitorreportingsystem
3 min read

Quick Answer

This script runs hostname, uptime -p, free -h, df -h /, and hostname -I in one command and formats the output as a readable system snapshot. No extra packages required.

The Script

Paste this into syscheck.sh. It runs instantly and requires no additional tools — everything used here is pre-installed on Linux and macOS.

bash
#!/bin/bash # Quick System Info Report # Prints key stats at a glance. # Alias to 'syscheck' in your .bashrc for fast access. # # USAGE: ./syscheck.sh # REQUIRES: bash, hostname, uptime, free, df (pre-installed everywhere) echo "=== Quick System Check ===" echo "Host : $(hostname)" echo "Uptime : $(uptime -p)" echo "RAM : $(free -h | awk '/Mem/{print $3"/"$2}')" echo "Disk / : $(df -h / | awk 'NR==2{print $3"/"$2}')" echo "IP : $(hostname -I | awk '{print $1}')" echo "========================="

Sample output

=== Quick System Check ===

Host : my-server

Uptime : up 3 days, 4 hours

RAM : 1.2G/2.0G

Disk / : 8.3G/25G

IP : 192.168.1.42

=========================

Step-by-Step Setup

Step 1 — Create the file

bash
nano syscheck.sh

Paste the script, then Ctrl+X → Y → Enter to save.

Step 2 — Make it executable

bash
chmod +x syscheck.sh

Step 3 — Run it once to confirm it works

bash
./syscheck.sh

You should see your system stats printed cleanly. If uptime -p fails on older systems, see the macOS/compatibility note below.

Step 4 — Alias it for instant access anywhere

This is the step that makes it actually useful. Open your .bashrc (or .zshrc if you use zsh):

bash
nano ~/.bashrc

Add this line at the bottom:

bash
alias syscheck='/home/user/syscheck.sh' # ← use your actual path

Save, then reload your shell config:

bash
source ~/.bashrc

Now you can type syscheck from anywhere in any terminal session and get your system snapshot instantly.

� Using zsh instead of bash?

Add the alias to ~/.zshrc instead of ~/.bashrc, then run source ~/.zshrc. Everything else stays the same.

Variations

Add CPU load average

bash
#!/bin/bash echo "=== Quick System Check ===" echo "Host : $(hostname)" echo "Uptime : $(uptime -p)" echo "Load : $(uptime | awk -F'load average:' '{print $2}' | xargs)" echo "RAM : $(free -h | awk '/Mem/{print $3"/"$2}')" echo "Disk / : $(df -h / | awk 'NR==2{print $3"/"$2}')" echo "IP : $(hostname -I | awk '{print $1}')" echo "========================="

Check multiple disks at once

bash
#!/bin/bash echo "=== System Check ===" echo "Host : $(hostname)" echo "Uptime : $(uptime -p)" echo "RAM : $(free -h | awk '/Mem/{print $3"/"$2}')" echo "" echo "-- Disk Usage --" df -h --output=target,used,avail,pcent | grep -v tmpfs | grep -v udev echo "==================="

macOS compatible version

The uptime -p flag and hostname -I aren't available on macOS. Use this version instead:

bash
#!/bin/bash echo "=== Quick System Check ===" echo "Host : $(hostname)" echo "Uptime : $(uptime | awk '{print $3, $4}' | tr -d ',')" echo "RAM : $(vm_stat | awk '/Pages active/{print $3}') pages active" echo "Disk / : $(df -h / | awk 'NR==2{print $3"/"$2}')" echo "IP : $(ipconfig getifaddr en0)" echo "========================="

Common Mistakes

uptime -p doesn't exist on macOS or older Linux

The -p flag was added in coreutils 8.24 (2015). On macOS and some minimal containers, it fails silently or errors. Use the macOS variation shown above, or fall back to: uptime | awk '{print $3,$4}' | tr -d ','

hostname -I returns nothing inside Docker containers

Minimal containers often don't have a proper network config for hostname -I. Use: ip route get 1.1.1.1 | awk '{print $7}' as a more reliable fallback for containers and VMs.

Aliasing to .bashrc but using zsh

If your default shell is zsh (common on macOS), aliases in ~/.bashrc won't load. Add the alias to ~/.zshrc instead and run source ~/.zshrc.

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Understanding the Commands

CommandWhat it outputs
hostnameThe machine's hostname — the name it goes by on the network
uptime -pHuman-readable uptime: "up 3 days, 4 hours, 12 minutes"
free -hRAM stats in human-readable format (GB/MB)
awk '/Mem/{print $3"/"$2}'Extracts used/total from the Mem row of free output
df -h /Disk usage for the root partition in human-readable format
awk 'NR==2{print $3"/"$2}'Extracts used/total from the second row of df output
hostname -IAll IP addresses for the machine (Linux only)
awk '{print $1}'Grabs just the first IP from hostname -I output

Frequently Asked Questions

How do I check system info in Linux with one command?

Create a bash script that runs hostname, uptime -p, free -h, df -h /, and hostname -I together and formats them cleanly. Save it, make it executable with chmod +x, then alias it in ~/.bashrc so you can call it from anywhere.

How do I check RAM usage in Linux from the terminal?

Run free -h to see total, used, free, and available RAM in human-readable format. To extract just used/total in a script: free -h | awk '/Mem/{print $3"/"$2}'

How do I create a bash alias for a script?

Add alias syscheck='/home/user/syscheck.sh' to your ~/.bashrc file, then run source ~/.bashrc to activate it. After that, typing syscheck in any terminal runs your script instantly.

What command shows uptime in Linux?

Run uptime -p for a clean, human-readable result like "up 3 days, 4 hours, 12 minutes." Running plain uptime shows the same info plus load averages in a slightly different format.

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Written by Anguishe

Creator of BashSnippets.xyz

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Frequently Asked Questions

How do I run this script?

Save as syscheck.sh, run chmod +x syscheck.sh, then execute ./syscheck.sh for an instant system snapshot.

Does this work on macOS?

Mostly. Replace free -h with vm_stat and hostname -I with ipconfig getifaddr en0 for macOS compatibility.

How do I check system info in Linux with one command?

Create a bash script that runs hostname, uptime -p, free -h, df -h /, and hostname -I together, then alias it in ~/.bashrc.

How do I create a bash alias for a script?

Add alias syscheck=/home/user/syscheck.sh to ~/.bashrc, then run source ~/.bashrc to activate it.

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