Difference between revisions of "Linux - Smart Linux Tricks"
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= Restart a service = | = Restart a service = | ||
<code>sudo service FOOBAR restart</code> | * <code>sudo service '''FOOBAR''' restart</code> | ||
or | or | ||
<code>sudo systemctl restart FOOBAR.service</code> | * <code>sudo systemctl restart '''FOOBAR'''.service</code> | ||
Where "FOOBAR" is the name of the service you want to restart... | Where "'''FOOBAR'''" is the name of the service you want to restart... | ||
= Taking a screenshot (in Mint Cinnamon) = | = Taking a screenshot (in Mint Cinnamon) = | ||
| Line 17: | Line 17: | ||
{{!}}- | {{!}}- | ||
{{!}} Take a screenshot | {{!}} Take a screenshot | ||
{{!}} <code>Print</code> | {{!}} ''' <code>Print</code>''' | ||
{{!}}- | {{!}}- | ||
{{!}} Take a screenshot of a window | {{!}} Take a screenshot of a window | ||
{{!}} | {{!}} <code>Alt</code> + '''<code>Print</code>''' | ||
{{!}}- | {{!}}- | ||
{{!}} Take a screenshot of an area | {{!}} Take a screenshot of an area | ||
{{!}} | {{!}} <code>Shift</code> + '''<code>Print</code>''' | ||
{{!}}- | {{!}}- | ||
{{!}} Copy screen to clipboard | {{!}} Copy screen to clipboard | ||
{{!}} | {{!}} <code>Control</code> + '''<code>Print</code>''' | ||
{{!}}- | {{!}}- | ||
{{!}} Copy window to clipboard | {{!}} Copy window to clipboard | ||
{{!}} | {{!}} <code>Control</code> + <code>Alt</code> + '''<code>Print</code>''' | ||
{{!}}- | {{!}}- | ||
{{!}} Copy area to clipboard | {{!}} Copy area to clipboard | ||
{{!}} | {{!}} <code>Shift</code> + <code>Control</code> + '''<code>Print</code>''' | ||
{{!}}- | {{!}}- | ||
{{!}} Toggle recording desktop | {{!}} Toggle recording desktop | ||
{{!}} | {{!}} <code>Shift</code> + <code>Control</code> + <code>Alt</code> + <code>R</code> | ||
{{!}}} | {{!}}} | ||
'''<code>Print</code>''' may have its own special label on your keyboard. On mine the '''<code>Print</code>''' key is labeled '''<code>PrtSc</code>'''. | |||
<code>Print</code> may have its own special label on your keyboard. On mine the <code>Print</code> key is labeled <code>PrtSc</code>. | |||
= Testing Network Connectivity = | = Testing Network Connectivity = | ||
| Line 44: | Line 43: | ||
== A handy little script: == | == A handy little script: == | ||
#!/bin/bash | #!/bin/bash | ||
if nc -zw1 pfSense 443 | if nc -zw1 pfSense 443 | ||
then | then | ||
| Line 53: | Line 52: | ||
exit | exit | ||
fi | fi | ||
Uses [https://linux.die.net/man/1/nc netcat] (nc) to simply check if the router ([[NetMan - pfSense{{!}}pfsense]]) is currently findable by name & responding to HTTPS (port 443). | Uses [https://linux.die.net/man/1/nc netcat] (nc) to simply check if the router ([[NetMan - pfSense{{!}}pfsense]]) is currently findable by name & responding to HTTPS (port 443). | ||
Then either tells you if it's OK or asks for your password to restart the [https://www.man7.org/linux/man-pages/man8/systemd-resolved.8.html DNS resolver]. | Then either tells you if it's OK or asks for your password to restart the [https://www.man7.org/linux/man-pages/man8/systemd-resolved.8.html DNS resolver]. | ||
= Kind of a silly little on-liner to paint a rainbow in the terminal... = | = Less "Useful" Stuff = | ||
== Kind of a silly little on-liner to paint a rainbow in the terminal... == | |||
*<code>yes "$(seq 231 -1 16)" {{!}} while read i; do printf "\x1b[48;5;${i}m\n"; sleep .02; done</code> | *<code>yes "$(seq 231 -1 16)" {{!}} while read i; do printf "\x1b[48;5;${i}m\n"; sleep .02; done</code> | ||
= Create custom fortune cookies files = | == Create custom fortune cookies files == | ||
#Open your favourite editor and add the strings that you want to be shown when running "fortune" in terminal. BE SURE to add a single line with a letter % in it, between every string. | #Open your favourite editor and add the strings that you want to be shown when running "fortune" in terminal. BE SURE to add a single line with a letter % in it, between every string. | ||
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#Might wanna put this in <code>/usr/share/games/fortunes</code> if you want it to actually work tho... | #Might wanna put this in <code>/usr/share/games/fortunes</code> if you want it to actually work tho... | ||
(Do note... It's a <code>sudo</code> thing...) | (Do note... It's a <code>sudo</code> thing...) | ||
= Some other tips... = | = Some other tips... = | ||
* [https://www.cyberciti.biz/faq/linux-copy-clone-usb-stick-including-partitions/ Copy and clone USB stick including partitions] | * [https://www.cyberciti.biz/faq/linux-copy-clone-usb-stick-including-partitions/ Copy and clone USB stick including partitions] | ||
* [https://www.cyberciti.biz/tips/how-do-i-save-recover-data-from-crashed-disks-with-dd-and-ddrescue-command.html Save and Recover Data From Crashed Disks With ddrescue Command Like a Pro] | * [https://www.cyberciti.biz/tips/how-do-i-save-recover-data-from-crashed-disks-with-dd-and-ddrescue-command.html Save and Recover Data From Crashed Disks With ddrescue Command Like a Pro] | ||
* [[Linux - Process Supervision using Monit{{!}}Process Supervision using Monit]] | * [[Linux - Process Supervision using Monit{{!}}Process Supervision using Monit]] | ||
* [https://unix.stackexchange.com/questions/254477/linux-alternative-to-altnumpad-codes Linux alternative to alt+numpad codes] | * [https://unix.stackexchange.com/questions/254477/linux-alternative-to-altnumpad-codes Linux alternative to alt+numpad codes] | ||
* [https://unix.stackexchange.com/questions/159094/how-to-install-a-deb-file-by-dpkg-i-or-by-apt How to install a deb file, by dpkg -i or by apt?] | * [https://unix.stackexchange.com/questions/159094/how-to-install-a-deb-file-by-dpkg-i-or-by-apt How to install a deb file, by dpkg -i or by apt?] | ||
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** Right click on an empty-is spot...Verify it's not in '''Panel edit mode''' | ** Right click on an empty-is spot...Verify it's not in '''Panel edit mode''' | ||
* [https://forums.linuxmint.com/viewtopic.php?t=249705 <nowiki>[SOLVED]</nowiki> gnome-keyring-daemon prevents shutdown] | * [https://forums.linuxmint.com/viewtopic.php?t=249705 <nowiki>[SOLVED]</nowiki> gnome-keyring-daemon prevents shutdown] | ||
[[Category:Linux]] | |||
[[Category:Knowledge]] | |||
Latest revision as of 18:28, 27 January 2022
A collection of tips & tricks for using Linux...
Restart a service
sudo service FOOBAR restart
or
sudo systemctl restart FOOBAR.service
Where "FOOBAR" is the name of the service you want to restart...
Taking a screenshot (in Mint Cinnamon)
Here are the default shortcuts. You can customize them in Keyboard Settings, as shown in the image that started this post.
| Action | Shortcut |
|---|---|
| Take a screenshot | Print
|
| Take a screenshot of a window | Alt + Print
|
| Take a screenshot of an area | Shift + Print
|
| Copy screen to clipboard | Control + Print
|
| Copy window to clipboard | Control + Alt + Print
|
| Copy area to clipboard | Shift + Control + Print
|
| Toggle recording desktop | Shift + Control + Alt + R
|
Print may have its own special label on your keyboard. On mine the Print key is labeled PrtSc.
Testing Network Connectivity
A handy little script:
#!/bin/bash if nc -zw1 pfSense 443 then echo "We have DNS..." else echo "NOPE! No DNS..." sudo systemctl restart systemd-resolved exit fi
Uses netcat (nc) to simply check if the router (pfsense) is currently findable by name & responding to HTTPS (port 443).
Then either tells you if it's OK or asks for your password to restart the DNS resolver.
Less "Useful" Stuff
Kind of a silly little on-liner to paint a rainbow in the terminal...
yes "$(seq 231 -1 16)" | while read i; do printf "\x1b[48;5;${i}m\n"; sleep .02; done
Create custom fortune cookies files
- Open your favourite editor and add the strings that you want to be shown when running "fortune" in terminal. BE SURE to add a single line with a letter % in it, between every string.
- Save this file to whatever file name you want; this guide uses "yourlist" as example.
- When done adding strings, the following command will create a .dat file for your cookie file, which contains a header structure and a table of file offsets for each group of lines. This allows random access of the strings.
strfile -c % yourlist yourlist.dat
- Run
fortune yourlistto eat the fruit of your work. That's it! - Might wanna put this in
/usr/share/games/fortunesif you want it to actually work tho...
(Do note... It's a sudo thing...)
Some other tips...
- Copy and clone USB stick including partitions
- Save and Recover Data From Crashed Disks With ddrescue Command Like a Pro
- Process Supervision using Monit
- Linux alternative to alt+numpad codes
- How to install a deb file, by dpkg -i or by apt?
- Get details about the linux distro installed:
cat /etc/*release*
- Install Updates on Ubuntu, Linux Mint, and elementary OS from Terminal
- Panel Menu Not Responding
- Right click on an empty-is spot...Verify it's not in Panel edit mode
- [SOLVED] gnome-keyring-daemon prevents shutdown