#techtip — Public Fediverse posts

#TechTipThursday

The best time to learn a new Linux tool is when nothing is on fire.
Pick one command you use often and go one level deeper this week.

Already use grep? Try grep -r, grep -v, grep -E.
Already use find? Add -exec to actually do something with the results.
Already use systemctl? Try systemctl list-dependencies.

You don't need a course. You need 20 minutes and a test machine. man is still the best documentation that exists.

#Linux #SysAdmin #LearningLinux #TechTip

#TechTipThursday

The best time to learn a new Linux tool is when nothing is on fire.
Pick one command you use often and go one level deeper this week.

Already use grep? Try grep -r, grep -v, grep -E.
Already use find? Add -exec to actually do something with the results.
Already use systemctl? Try systemctl list-dependencies.

You don't need a course. You need 20 minutes and a test machine. man is still the best documentation that exists.

#Linux #SysAdmin #LearningLinux #TechTip

#TechTipThursday

The best time to learn a new Linux tool is when nothing is on fire.
Pick one command you use often and go one level deeper this week.

Already use grep? Try grep -r, grep -v, grep -E.
Already use find? Add -exec to actually do something with the results.
Already use systemctl? Try systemctl list-dependencies.

You don't need a course. You need 20 minutes and a test machine. man is still the best documentation that exists.

#Linux #SysAdmin #LearningLinux #TechTip

#TechTipThursday

The best time to learn a new Linux tool is when nothing is on fire.
Pick one command you use often and go one level deeper this week.

Already use grep? Try grep -r, grep -v, grep -E.
Already use find? Add -exec to actually do something with the results.
Already use systemctl? Try systemctl list-dependencies.

You don't need a course. You need 20 minutes and a test machine. man is still the best documentation that exists.

#Linux #SysAdmin #LearningLinux #TechTip

#TechTipThursday

The best time to learn a new Linux tool is when nothing is on fire.
Pick one command you use often and go one level deeper this week.

Already use grep? Try grep -r, grep -v, grep -E.
Already use find? Add -exec to actually do something with the results.
Already use systemctl? Try systemctl list-dependencies.

You don't need a course. You need 20 minutes and a test machine. man is still the best documentation that exists.

#Linux #SysAdmin #LearningLinux #TechTip

Need to find a file fast on Linux?

Search by name: find /path -name "filename"
Search by content: grep -r "search term" /path
Find recently modified files: find /path -mtime -1

The file is there. You just have to know how to look.
#TechTipThursday #Linux #SysAdmin #TechTip #OpenSource

Need to find a file fast on Linux?

Search by name: find /path -name "filename"
Search by content: grep -r "search term" /path
Find recently modified files: find /path -mtime -1

The file is there. You just have to know how to look.
#TechTipThursday #Linux #SysAdmin #TechTip #OpenSource

Need to find a file fast on Linux?

Search by name: find /path -name "filename"
Search by content: grep -r "search term" /path
Find recently modified files: find /path -mtime -1

The file is there. You just have to know how to look.
#TechTipThursday #Linux #SysAdmin #TechTip #OpenSource

Need to find a file fast on Linux?

Search by name: find /path -name "filename"
Search by content: grep -r "search term" /path
Find recently modified files: find /path -mtime -1

The file is there. You just have to know how to look.
#TechTipThursday #Linux #SysAdmin #TechTip #OpenSource

Need to find a file fast on Linux?

Search by name: find /path -name "filename"
Search by content: grep -r "search term" /path
Find recently modified files: find /path -mtime -1

The file is there. You just have to know how to look.
#TechTipThursday #Linux #SysAdmin #TechTip #OpenSource

Here are a few simple tips I’ve picked up over my years as a PC nerd. I wrote this before, but it was too long for my Mastodon account, so here it is as an bitmap. Tip: See the ALT text. :)

You’ve probably read these rules somewhere. If not, you’ll find good tips here.

You don’t have to do much to manage passwords... With my tips, anyone else can have or know your passwords, but they’ll be useless. Read why:

#Passwords #CyberSecurity #PasswordManager #SecurityTips #TechTip #KeepItSimple

Here are a few simple tips I’ve picked up over my years as a PC nerd. I wrote this before, but it was too long for my Mastodon account, so here it is as an bitmap. Tip: See the ALT text. :)

You’ve probably read these rules somewhere. If not, you’ll find good tips here.

You don’t have to do much to manage passwords... With my tips, anyone else can have or know your passwords, but they’ll be useless. Read why:

#Passwords #CyberSecurity #PasswordManager #SecurityTips #TechTip #KeepItSimple

Here are a few simple tips I’ve picked up over my years as a PC nerd. I wrote this before, but it was too long for my Mastodon account, so here it is as an bitmap. Tip: See the ALT text. :)

You’ve probably read these rules somewhere. If not, you’ll find good tips here.

You don’t have to do much to manage passwords... With my tips, anyone else can have or know your passwords, but they’ll be useless. Read why:

#Passwords #CyberSecurity #PasswordManager #SecurityTips #TechTip #KeepItSimple

Here are a few simple tips I’ve picked up over my years as a PC nerd. I wrote this before, but it was too long for my Mastodon account, so here it is as an bitmap. Tip: See the ALT text. :)

You’ve probably read these rules somewhere. If not, you’ll find good tips here.

You don’t have to do much to manage passwords... With my tips, anyone else can have or know your passwords, but they’ll be useless. Read why:

#Passwords #CyberSecurity #PasswordManager #SecurityTips #TechTip #KeepItSimple

Here are a few simple tips I’ve picked up over my years as a PC nerd. I wrote this before, but it was too long for my Mastodon account, so here it is as an bitmap. Tip: See the ALT text. :)

You’ve probably read these rules somewhere. If not, you’ll find good tips here.

You don’t have to do much to manage passwords... With my tips, anyone else can have or know your passwords, but they’ll be useless. Read why:

#Passwords #CyberSecurity #PasswordManager #SecurityTips #TechTip #KeepItSimple

Permissions are the backbone of Linux security. Know these cold:

Add a user to a group: usermod -aG groupname username
Check what groups a user belongs to: groups username
Change file ownership: chown user:group filename

"Just chmod 777 it" is not a permissions strategy. It's a cry for help.
#Linux #SysAdmin #Permissions #TechTip #TechTipThursday

Permissions are the backbone of Linux security. Know these cold:

Add a user to a group: usermod -aG groupname username
Check what groups a user belongs to: groups username
Change file ownership: chown user:group filename

"Just chmod 777 it" is not a permissions strategy. It's a cry for help.
#Linux #SysAdmin #Permissions #TechTip #TechTipThursday

Permissions are the backbone of Linux security. Know these cold:

Add a user to a group: usermod -aG groupname username
Check what groups a user belongs to: groups username
Change file ownership: chown user:group filename

"Just chmod 777 it" is not a permissions strategy. It's a cry for help.
#Linux #SysAdmin #Permissions #TechTip #TechTipThursday

Permissions are the backbone of Linux security. Know these cold:

Add a user to a group: usermod -aG groupname username
Check what groups a user belongs to: groups username
Change file ownership: chown user:group filename

"Just chmod 777 it" is not a permissions strategy. It's a cry for help.
#Linux #SysAdmin #Permissions #TechTip #TechTipThursday

Permissions are the backbone of Linux security. Know these cold:

Add a user to a group: usermod -aG groupname username
Check what groups a user belongs to: groups username
Change file ownership: chown user:group filename

"Just chmod 777 it" is not a permissions strategy. It's a cry for help.
#Linux #SysAdmin #Permissions #TechTip #TechTipThursday

Top Tech Tip!

Your ICs will have a higher test pass rate if you test them as what they actually are, rather than what you thought you grabbed.

(No, I didn't just test a bunch of MOSFETs as if they were power-monitoring chips. Shut up. No, *you* smell.)

#hobby #electronics #DIY #TechTip #oops #brainfart

Top Tech Tip!

Your ICs will have a higher test pass rate if you test them as what they actually are, rather than what you thought you grabbed.

(No, I didn't just test a bunch of MOSFETs as if they were power-monitoring chips. Shut up. No, *you* smell.)

#hobby #electronics #DIY #TechTip #oops #brainfart

Top Tech Tip!

Your ICs will have a higher test pass rate if you test them as what they actually are, rather than what you thought you grabbed.

(No, I didn't just test a bunch of MOSFETs as if they were power-monitoring chips. Shut up. No, *you* smell.)

#hobby #electronics #DIY #TechTip #oops #brainfart

Top Tech Tip!

Your ICs will have a higher test pass rate if you test them as what they actually are, rather than what you thought you grabbed.

(No, I didn't just test a bunch of MOSFETs as if they were power-monitoring chips. Shut up. No, *you* smell.)

#hobby #electronics #DIY #TechTip #oops #brainfart

Top Tech Tip!

Your ICs will have a higher test pass rate if you test them as what they actually are, rather than what you thought you grabbed.

(No, I didn't just test a bunch of MOSFETs as if they were power-monitoring chips. Shut up. No, *you* smell.)

#hobby #electronics #DIY #TechTip #oops #brainfart

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

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

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

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

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

#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

#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

#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

#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

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

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

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

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

#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

#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

#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

#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

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

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

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

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

#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

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 #

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 #

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 #

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 #

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 #

Another chapter in my Linux snuppets series #4: Stop filling up your disk with temporary zip files. Here is how to stream a directory directly from one server to another using tar and SSH in a single pipeline.
https://schulz.dk/2026/04/23/linux-snippets-4-the-zero-storage-network-clone/

#linux #tar #cli #terminal #tip #schulz.dk @blog #techtip

Another chapter in my Linux snuppets series #4: Stop filling up your disk with temporary zip files. Here is how to stream a directory directly from one server to another using tar and SSH in a single pipeline.
https://schulz.dk/2026/04/23/linux-snippets-4-the-zero-storage-network-clone/

#linux #tar #cli #terminal #tip #schulz.dk @blog #techtip