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1500 questions
172
votes
18 answers

What system monitoring tools are available?

I am looking for system monitoring tools which are GUI and CLI or web-based which include basic functions such as: CPU Usage Ram Usage Swap Usage Disk Usage ( Space / I/O ) Heat Monitoring I know there are many tools I can use, but I am looking…
Qasim
  • 22,092
172
votes
3 answers

Difference between PGP and GPG

What are the main differences between PGP (Pretty Good Privacy) and GPG (GNU Privacy Guard) in relationship with security in Ubuntu and Launchpad?
Luis Alvarado
  • 211,503
172
votes
3 answers

How can I tell if my system was booted as EFI/UEFI or BIOS?

How do I determine whether a particular running Ubuntu system was booted using EFI/UEFI, or BIOS?
Alexander Trauzzi
  • 2,139
172
votes
11 answers

How can I tell what date Ubuntu was installed?

is there a command which will output the date that ubuntu (or any distribution) was installed?
lxtips
  • 1,821
172
votes
8 answers

What commands (exactly) should replace the deprecated apt-key?

Setting up keys for a local repository on a new ubuntu 20.10 virtual machine, I got a message that apt-key add was deprecated and I should read the apt-key(8) man page. The apt-key(8) man page is a collection of words strung together, but if it…
user1160711
  • 2,277
171
votes
2 answers

What do the last two fields in fstab mean?

The last two fields on each line in fstab (dump and pass) are some numbers (usually, 0). What do these numbers mean? # proc /proc proc nodev,noexec,nosuid 0…
elzapp
  • 2,090
171
votes
6 answers

What is the difference between Ctrl-z and Ctrl-c in the terminal?

Can anyone tell me the difference between ctrl+z and ctrl+c? When I am in the terminal, both the combinations stop the current process, but what exactly is the difference between both?
chaitanya lakkundi
  • 1,871
  • 2
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  • 9
171
votes
2 answers

How to enable mod_rewrite in Apache?

I just installed the LAMP stack on my Ubuntu system. The redirection is not working for me. I don't know how to fix it. Can anyone help me?
vinoth
  • 1,811
171
votes
5 answers

How to run 32-bit app in Ubuntu 64-bit?

I installed Ubuntu 14.04 and the current Android development SDK, which contains 32-bit executables. I found that I cannot run those 32-bit binaries. Trying to start them from bash gives me an error: $ ./adb bash: ./adb: No such file or…
Thomas Stuefe
  • 1,813
171
votes
2 answers

What is the difference between "source" and "."?

What is the difference between executing a script (e.g. /some/script) with source /some/script and . /some/script in Bash?
binW
  • 13,034
171
votes
10 answers

Quickly place a window to another screen using only the keyboard

I know that using Alt+F7, I can use the keyboard to move the window around. I can also use the "Grid" plugin of Compiz to position quickly the window around my current monitor. The grid plugin doesn't seem work across monitor however. What I need is…
Dat Chu
  • 1,907
171
votes
4 answers

How do I grant sudo privileges to an existing user?

I want to grant a newly created user sudo privileges in Ubuntu. I tried sudo adduser hduser admin but it says no admin group exists. How can I do it?
saket
  • 1,821
170
votes
3 answers

Where to install programs?

Possible Duplicate: What is the best place to install user apps? I've downloaded a .tar.gz and ran sudo sh install.sh. It's asking me where to install the program to. I don't want it cluttering up my home directory, and I want it to be available…
mpen
  • 2,186
170
votes
9 answers

How to switch language keyboard combination?

I would like to type Hebrew in Ubuntu. I tried downloading the Hebrew language pack and then setting alt-shift as my layout-change shortcut in the Options section of "Keyboard Layout". However, when I actually press alt-shift, nothing happens. How…
Itay Moav -Malimovka
  • 1,968
170
votes
2 answers

cannot change screen size from 640x480 after 14.04 installation on VirtualBox OSX

After installing Ubuntu 14.04 guest on VirtualBox running on a Max OSX host, I am stuck with 640x480 screen resolution. Adding guest additions again doesn't help. Previous Ubuntu installations are fine with bigger resolution. The 'Detect Displays'…
user271956
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