Package management is one of those things every Linux admin should know cold.

Search for a package: dnf search packagename
Install it: dnf install packagename
Check what's installed: rpm -qa | grep packagename
Remove it cleanly: dnf remove packagename

Your package manager is your best friend. Treat it accordingly.
#Linux #SysAdmin #PackageManagement #TechTip #RHEL

#TechTipThursday
Package management is one of those things every Linux admin should know cold.

Search for a package:
dnf search packagename

Install it:
dnf install packagename

Check what's installed:
rpm -qa | grep packagename

Remove it cleanly:
dnf remove packagename

Your package manager is your best friend. Treat it accordingly.
#Linux #SysAdmin #PackageManagement #TechTip #RHEL #RockyLinux

SSH is how you get things done remotely. Know it cold.
Connect to a remote host: ssh user@hostname
Copy files securely: scp file.txt user@hostname:/path/
Generate SSH keys: ssh-keygen -t ed25519

Passwords are fine. Keys are better. Use keys.
#Linux #SysAdmin #SSH #Security #TechTip #TechTipThursday

#TechTipThursday

Your Linux host is only as secure as you make it.
Check who's logged in right now: who
See open network connections: ss -tulnp

Check for listening services you don't recognize:
systemctl list-units --type=service --state=running

If you can't explain why a service is running, that's your homework.
#Linux #SysAdmin #Security #TechTip

Lock down user accounts on Linux before something else does.

List failed login attempts: lastb
Lock a user account: usermod -L username
Force a password change at next login: chage -d 0 username

Your servers are being probed right now. Act accordingly.
#Linux #SysAdmin #Security #TechTip

#TechTip
I've just seen a IT video saying "I always leave the background as default."
I always change the background & colours to my favourites.

It has a side-benefit: occasionally I have seen a malicious pop-up window trying to get me to do something. It stands out because it's not in my colours

#TechTip
I've just seen a IT video saying "I always leave the background as default."
I always change the background & colours to my favourites.

It has a side-benefit: occasionally I have seen a malicious pop-up window trying to get me to do something. It stands out because it's not in my colours

💡 𝗤𝗨𝗜𝗖𝗞 𝗛𝗔 𝗧𝗜𝗣!
Trigger IDs will clean up your automations instantly!

𝗗𝗼 𝘆𝗼𝘂 𝗮𝗴𝗿𝗲𝗲? 👇

#homeassistant #smarthomejunkie #smarthome #techtip

Set a static IP on Linux:
nmcli con mod "connection-name" ipv4.addresses 192.168.1.100/24
nmcli con mod "connection-name" ipv4.gateway 192.168.1.1
nmcli con mod "connection-name" ipv4.method manual
nmcli con up "connection-name"

Because "it gets an IP from DHCP" is fine...until it isn't.
#Linux #SysAdmin #Networking #TechTip #