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1500 questions
275
votes
3 answers

ps aux output meaning

When typing the command ps aux, what does each column of the output mean? For example: $ ps aux timothy 29217 0.0 0.0 11916 4560 pts/21 S+ 08:15 0:00 pine root 29505 0.0 0.0 38196 2728 ? Ss Mar07 0:00 sshd: can [priv] …
Tim
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274
votes
9 answers

In vim, how can I quickly switch between tabs?

In gnome-terminal, I can just press Alt + (1, 2, 3, etc.) to switch to specific tabs. I can also use Ctrl + (PgUp / PgDn) to cycle through tabs (admittedly less convenient, but it can be remapped). If I want to use vim tabs instead of gnome-terminal…
Matthew
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273
votes
12 answers

Why does my microwave kill the Wi-Fi?

Every time I start the microwave in the kitchen, our home Wi-Fi stops working and all devices lose connection with our router! The kitchen and the Wi-Fi router are in opposite ends of the apartment but devices are being used a little here and there.…
Ohlin
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273
votes
5 answers

Why should I use Vagrant instead of just VirtualBox?

I've been using VirtualBox for many years to create a development environment. A lot of my colleagues are talking about Vagrant and many people seem very excited about it but I just can't seem to grasp the benefits of it.. seems to me like it's a…
John Hunt
  • 3,148
273
votes
17 answers

How can I produce high CPU load on a Linux server?

I’m currently in the process of debugging a Cacti installation and want to create CPU load to debug my CPU utilization graphs. I tried to simply run cat /dev/zero > /dev/null, which works great but only utilizes 1 core: Is there a better method of…
Oliver Salzburg
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272
votes
3 answers

Rename screen session

Is it possible to change the name of a GNU screen session? Say I called started it with "screen -S foo" and I want to rename it to bar.
moinudin
  • 3,074
271
votes
9 answers

Get a list of Open Ports in Linux

I need a Linux command to list all free open ports for use in an application lsof -i TCP| fgrep LISTEN Does not seen to be helping as the Ports it lists are not necessarily free for use. How do I list free open ports not in use?
Stanley Mungai
  • 2,821
271
votes
11 answers

Can you GPG sign old commits?

Git now has the ability to sign commits with git commit -S, which is great, but sometimes I forget the flag to commit, and sometimes I mail myself patches which I apply with am, and that command doesn't have a flag for signing. Is there a way to…
Magnus
  • 4,386
271
votes
19 answers

Unix/Linux find and sort by date modified

How can I do a simple find which would order the results by most recently modified? Here is the current find I am using (I am doing a shell escape in PHP, so that is the reasoning for the variables): find '$dir' -name '$str'\* -print | head -10 How…
Richard Easton
270
votes
8 answers

Get Last Modified Date of File in Linux

I'm new to Linux. I'm using the command-line. I'm trying to view the last modified date of a file. How do I do that in Linux from the Command Line?
user70192
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266
votes
11 answers

Is it possible to ping an address:port?

I am not into networking, and I have the following question related to the Linux ping command. Can I only ping an address? For example: miner@raspberrypi ~ $ ping onofri.org PING onofri.org (67.222.36.105) 56(84) bytes of data. 64 bytes from…
AndreaNobili
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266
votes
3 answers

How to connect to a website that has only IPv6 addresses without a domain name?

If a server has only IPv6 addresses without a domain name, how can I connect to the server from my web-browser?
Eonil
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266
votes
27 answers

What can I do to stop the Play / Pause button from opening iTunes?

In Snow Leopard the Play / Pause media button (on the F8 key) opens up iTunes. How can I disable that? Preferably keeping the old Leopard behaviour, so I can use it to control other media applications (e.g. Spotify).
Olly
  • 576
264
votes
10 answers

How to use Markdown in Notepad++

I love writing in Markdown and would like to be able to write and preview Markdown content in Notepad++. Are there any WYSIWYG Markdown plugins for Notepad++?
srk
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264
votes
10 answers

Why is Google so much faster than a hard-drive search?

When I search a file on my HD in Windows 7 or Windows XP it takes some minutes to finish the process. If I fill in a search term in Google, the answer is on my screen in milliseconds How is it possible for Google to search the Internet, which is…
Arne
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