comptia-a-plus-core2/labs/OS-9-linux-client-tools-lab.md

Lab OS-9: Linux Client Tools

Domain:

• 1.0 Operating Systems

Works on:

• Linux
• Windows comparison practice

Goal

Practice Linux commands that commonly appear on Core 2.

Linux Steps

Run:

cat /etc/os-release
whoami
pwd
ls -l
cat /etc/passwd
cat /etc/hosts
cat /etc/resolv.conf
cat /etc/fstab
ip addr
ip route
df -h
du -h
ps aux
top

Press q to quit top.

Practice file commands:

mkdir linux-practice
cd linux-practice
echo "Core 2 Linux practice" > notes.txt
cp notes.txt copy.txt
mv copy.txt renamed.txt
grep Linux notes.txt
chmod u+x renamed.txt
ls -l
cd ..
rm -r linux-practice

Record:

• Distribution:
• Current user:
• Current directory:
• DNS server:
• Default gateway:
• Root filesystem free space:
• One process name:
• Permission string before/after chmod u+x:

Windows Comparison Steps

Run:

dir
taskmgr
nslookup example.com
tracert example.com

Record Linux equivalents:

• dir:
• Task Manager process view:
• nslookup:
• tracert:

What You Should Learn

• /etc/passwd lists users.
• /etc/shadow stores password hashes and is protected.
• /etc/hosts maps names to IPs locally.
• /etc/resolv.conf shows DNS resolver settings.
• /etc/fstab controls startup mounts.
• chmod changes permissions.
• top and ps show processes.
• df and du show storage usage.