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Can't install any new softwares


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3 replies to this topic

#1 PieLam

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Posted 11 October 2017 - 06:28 PM

Hi All,

It's me again, the LM Noob having some difficulties, again. For those that don't know or for those that have forgotten my Linux PC is:

Linux Mint 18.2 (Sarah) W/ Cinnamon desktop.

Please advise if more info is needed.

 

Since I just occasionally use this PC, I didn't think much of this issue until now. I guess I thought, just maybe, the problem would just go away & fix itself, but for the past few months this problem keeps occurring & hasn't let up.

 

OK, that's pretty much the background. Here's what's happening:

Evidently, for some unknown reason I Can't install any new software on my PC. I've tried to install a few games, a few Back up utils and all of these end up with the same result; LM will not install it. I usually get the message "the package 'whatever' can't be installed"  or "such & such is in use, please check…" Once I even got "check your internet connection"! Duh, isn't the Software Repository DB online??

 

This is what I'm doing:

 

  • On my LM desktop (after initial boot) the Welcome  window pops up with many options.
  • From there, I click on <apps>
  • This takes me to another window where I can pick a category.
  • After browsing the category, I double click on a selection.
  • This takes me to another window where I can view the details, comments, etc. of my selection.
  • From that window I can see that the package has not been installed.
  • If I decide I want the package, I click on <install>.
  • After a few seconds,  I get the usual "can't install package" window.

 

 

Can anyone tell me what the deal is here?

 

--------------------------

A few hours later…

-------------------------

Well, it seems, that I've 'fixed' my own issue…

 

Just before posting the above, I decided to browse a few topics here on BC. I came across a post by cat1092 which nicely explained the importance of entering 'sudo ufw enable'. I thought to myself that "I don't need to do that" since I did that long ago in my previous version of LM.  Then it dawned on me, I probably need to enter it again in the upgraded version of LM that I'm using now.  Lo & behold!! It all works now !!!  I can select software packages & they install!

 

I wish I'd found this out much sooner! Yes, LM is wonderful! I love it, but it STILL has a long way to go before it becomes common, IMO.

 

To me, this is a prime example…

 

Can anyone offer their opinion or weigh-in?

 



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#2 NickAu

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Posted 12 October 2017 - 06:33 PM

Hi PieLam

Great to see you sorted the problem out yourself.


#3 pcpunk

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Posted 14 October 2017 - 10:13 AM

 

 

I came across a post by cat1092 which nicely explained the importance of entering 'sudo ufw enable'. I thought to myself that "I don't need to do that" since I did that long ago in my previous version of LM.  Then it dawned on me, I probably need to enter it again in the upgraded version of LM that I'm using now.  Lo & behold!! It all works now !!!  I can select software packages & they install!

Good Job PieLam, sometimes we just need to try things and do a little research.  What you did was Activate the "Uncomplicated Firewall" which should probably be activated by default but it's not.

https://wiki.ubuntu.com/UncomplicatedFirewall

 

I don't know why that fixed your problem but will try to remember this for future installs of Mint.

 

pc out


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#4 cat1092

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Posted 15 October 2017 - 05:09 AM

Yes it's important not only to have the ufw Firewall enabled, also read your router's owner's manual to activate it's NAT Firewall, which protects all computers & smartphones connected to your network. :)

 

While there, using a computer connected by Ethernet, also disable remote administration (unless needed), as well as UP&P, and finally change all passwords from their defaults, this keeps others from breaking into your network, or at least makes things a lot harder. 

 

Glad to hear that enabling the ufw Firewall fixed your issue, it's a necessity if the router is not properly secured and/or when connecting to public or other wireless networks that may not be as secure as the owner(s) thinks. Some AT&T routers are setup with a numbers only passphrase, a goldmine for one looking for a free wireless connection with the right software, or to steal data. That's why security begins at the inbound networking level (the router), not the network interface (NIC) of every connected computer or smartphone on the network. :)

 

Securing the router in today's Malware/Ransomware landscape is not an optional, rather necessary step, regardless of which OS's are connected. 

 

Cat


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