Questions tagged [linux]
A family of Unix-like operating systems using the Linux kernel. If your question is about a certain distribution only, use a more specific tag.
4,023
questions
157
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7
answers
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How can I tunnel all of my network traffic through SSH?
Whenever I'm using the internet from an insecure location (such as public wifi) I like to use an ssh tunnel (ssh -D port host) to ensure my traffic can't be sniffed. Unfortunately, there seem to be ...
- 1
137
votes
7
answers
93k
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How to analyse disk usage in command line linux?
du and df are nice, but I don't know how to filter the data they provide the way I do with SequoiaView. I would like to know which are the largest folders and the largest files in a glance.
- 16k
136
votes
8
answers
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VirtualBox to use dual monitors
I am running Kubuntu Hardy Heron, with a dual monitor setup, and have VirtualBox on it running Windows XP in seamless mode.
My problem is, I can't get VirtualBox to extend to the second monitor.
How ...
- 3,202
104
votes
9
answers
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What is the equivalent of Linux's "~" (tilde) in Windows?
In Linux, we can go to the user home by entering the tilde (~) character after cd:
cd ~
How to do the same in Windows?
Each time, I need to type:
cd C:\Document and Settings\freewind
That's too ...
- 1,897
83
votes
6
answers
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Using desktop as fake webcam on linux
I want to make a live stream of (a window on) my linux desktop using a free streaming site, using the captured video as a fake webcam. There are many tools for this on windows. ffmpeg allows me to ...
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52
votes
17
answers
58k
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Replace Symbolic Links with Files
Is there an easy way to replace all symbolic links with the file they link to?
- 633
49
votes
1
answer
137k
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How can I convert multiple files to UTF-8 encoding using *nix command line tools? [duplicate]
Possible Duplicate:
Batch-convert files for encoding or line ending
I have a bunch of text files that I'd like to convert from any given charset to UTF-8 encoding.
Are there any command line ...
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46
votes
2
answers
135k
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Allow specific user permission to read/write my folder
I have a folder /home/samantha/folder that I want to share with the user tom. He can read/write the folder. How do I do that?
chown wouldn't do it because I still want to be able to be the owner of ...
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38
votes
8
answers
12k
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How do you track which packages were installed on Ubuntu (Linux)?
(This question is very similar to 10458. It was suggested that Fedora and Ubuntu/Debian are different enough to warrant different answers.)
As I use any Ubuntu setup I gradually install a number of ...
- 878
38
votes
3
answers
57k
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How do I fork a process that doesn't die when shell exits?
If I run emacs from the shell:
$ emacs foo &
and then kill that shell, emacs dies.
How can I run a command so that it will not die when the shell dies?
I found references to nohup, but that ...
- 878
32
votes
1
answer
7k
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Is there a way to make bash more TAB friendly?
I use bash on both my Mac and as my cygwin shell. Overall, I'm quite pleased with it.
My one complaint however is that its TAB completion isn't as good as Windows Command Line TAB completion.
For ...
- 1,006
21
votes
2
answers
21k
views
Simulating a low-bandwidth, high-latency network connection on Linux
I'd like to simulate a high-latency, low-bandwidth network connection on my Linux machine.
Limiting bandwidth has been discussed before, e.g. here, but I can't find any posts which address limiting ...
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21
votes
3
answers
41k
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How to connect to Windows subsystem for Linux from another machine within network?
I set up my Ubuntu WSL instance and am running an SSH server on it. However, when I do ifconfig on the Ubuntu console, my Ipv4 is 172.26.66.223, which is different from my regular machine's ipv4 192....
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18
votes
5
answers
37k
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Wired to wireless bridge in Linux
I am attempting to set up my Raspberry Pi as a bridge, using Debian wheezy. I have a hostapd.conf: (some details changed for security, and yes, I know WEP is no good)...
interface=wlan0
bridge=br0
...
- 514
17
votes
5
answers
54k
views
Remap Keys in Linux
I'd like to switch my Ctrl and Alt keys under Linux (to make it more Mac-like). How do I do this?
If it helps, I'm running Ubuntu 9.04.
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15
votes
4
answers
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Is it possible to boot Linux from a GPT disk on a BIOS system?
I have an AMI BIOS computer [Asus EB1501P] with a Seagate ST9250315AS 250GB HDD.
Is it possible to boot Linux from a GPT disk on such a BIOS system?
- 1,803
15
votes
3
answers
39k
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Creating WiFi Access point on a single interface in Linux
I am trying to create a WiFi hotspot or an access point on my Linux laptop. I am using Opensuse Kde 12.3.
I found out a software called hostapd which lets you create hotspot but it requires two ...
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11
votes
7
answers
6k
views
Time Machine on Ubuntu?
Is there a Time Machine like backup system for Ubuntu? If not, what is the closest thing?
- 3,872
11
votes
4
answers
4k
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Unix tools: what if a file is named minus something?
I'm always wondering: most GNU/Unix tools take options in the form "minus something", sometimes followed by an argument. What if you got a file named minus something?
$ ls
-f
$ rm -f
$ ls
-f
$ mv -f ...
eepp
10
votes
2
answers
6k
views
What do I have to take care of when hibernating both Ubuntu and Windows (dual-boot environment)
I've got both Windows 7 and Ubuntu (finally) installed on my laptop.
For the sake of comfort, I usually hibernate Windows instead of shutting it down. And I think when using Ubuntu regularly, there ...
- 615
10
votes
1
answer
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views
dd_rescue vs dcfldd vs dd
What are the main differences between dd_rescue, dcfldd, and dd? In what situations would you use one over the other? Why are there three different yet simliar programs?
- 1,316
6
votes
3
answers
17k
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Setting up a multiseat configuration
I am trying to set up a multiseat computer configuration. In this arrangement, I have a laptop with an external keyboard, mouse, and monitor connected. I would like to allow two user sessions to be ...
- 2,020
5
votes
1
answer
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How/why does ssh output to tty when both stdout and stderr are redirected?
I've just noticed that
ssh user@host >/tmp/out 2>/tmp/err
can write something like
Warning the RAS host key...
...
Are you sure you want to continue connecting (yes/no)?
stdout and stderr ...
- 2,148
3
votes
2
answers
2k
views
Echoing output to file while seeing it in console in the same time [duplicate]
So I echo output of my programs ran in terminal by
command 2>&1 >> /path/toFile.txt
It creates few limitations that I want to overcome:
It "freezes" and gives no output in terminal - ...
- 1,639
2
votes
2
answers
2k
views
How can I open different browsers' windows with different network adapters?
I am trying to test a Wi-Fi network and I need to have the possibility to open different windows of Chrome or Firefox with a specific network adapter (for example, I have two Wi-Fi network adapters – ...
2
votes
4
answers
4k
views
Linux: How to list all video files with exactly 720p resolution?
I have several video files with different resolutions. Now I want to list only the video filenames with e.g. 720p resolution. I prefer one liners on the bash command line and I can receive helpful ...
2
votes
1
answer
781
views
Rebuild massively fragmented files with a partial image and a list of their sectors
In an attempt to recover as much data as possible off of a failing 3TB HDD, I proceeded like this :
I made a surface scan with HD Sentinel, which identified two small damaged areas and about 100 bad ...
- 855
1
vote
1
answer
310
views
Is there a way to have a dynamic system status area in the Linux terminal that updates while one does something else?
I'm thinking for some servers I look after, that after I SSH in to the box it would be very helpful to see things like disk usage, CPU usage and the such in the actual terminal I'm in as I’m working. ...
- 11
0
votes
3
answers
3k
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Convert video into format which is most likely playable on a windows system
I have some flv and mp4 videos, which I need to convert to a format which is playable on an a Windows Vista system (for a presentation). The problem is, that I cannot test the videos on the system on ...
- 465
0
votes
1
answer
2k
views
How to recursively search FTP server using Linux?
I googled this and found tons of answers, but for one reason or another they just didn't work for me or wouldn't fit the situation. I run DD-WRT third party firmware on my routers. Occasionally I want ...
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570
votes
4
answers
222k
views
How to turn off word-wrap in less
Short version:
How can I make the less utility in Linux not wrap lines?
Long version:
Often I need to view huge CSV files using less with hundreds of columns. I frequently only care about the first ...
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334
votes
9
answers
114k
views
How to append to a file as sudo?
I want to do:
echo "something" >> /etc/config_file
But, since only the root user has write permission to this file, I can't do that. But the following also doesn't work.
sudo echo "something" ...
- 7,407
253
votes
4
answers
451k
views
How to convert .ppk key to OpenSSH key under Linux?
I know that is possible to convert .ppk under puttygen in Windows, but how to do that on Linux? Is this possible ?
- 3,571
246
votes
11
answers
362k
views
What to do when Ctrl + C can't kill a process?
Ctrl + C doesn't always work to kill the current process (for instance, if that process is busy in certain network operations). In that case, you just see "^C" by your cursor and can't do ...
- 2,571
243
votes
13
answers
321k
views
Batch converting PNG to JPG in linux
Does anyone know a good way to batch-convert a bunch of PNGs into JPGs in linux? (I'm using Ubuntu).
A png2jpg binary that I could just drop into a shell script would be ideal.
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140
votes
5
answers
279k
views
How can I determine what process has a file open in Linux?
I'd like to determine what process has ownership of a lock-file. The lock-files are simply a file with a specific name that has been created.
So, how can I determine what process has a particular ...
- 1,604
140
votes
16
answers
207k
views
How to synchronize the home folder between multiple computers?
I have three computers at home, and would like to have the /home/ folder tree synchronized between the three.
Any files/folders (except those hidden) that are modified/added/removed in one of the ...
140
votes
24
answers
243k
views
Why is my SSH login slow?
I'm seeing delays in SSH Logins. Specifically, there are 2 spots where I see a range from instantaneous to multi-second delays.
Between issuing the ssh command and getting a login prompt and
between ...
- 1,862
130
votes
14
answers
148k
views
How to force GPG to use console-mode pinentry to prompt for passwords?
Using gpg from a console-based environment such as ssh sessions fails because the GTK pinentry dialog cannot be shown in a SSH session.
I tried unset DISPLAY but it did not help. The GPG command line ...
- 7,803
129
votes
11
answers
559k
views
How to install the real Firefox on Debian?
Debian 6 ("Squeeze") uses a rebranded version of Firefox called Iceweasel. It, however, lacks plugin support, and most of my favorites don't work.
So what is best way to install the "real" Firefox on ...
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127
votes
7
answers
235k
views
How to type special characters in Linux?
In windows there is possibility to type from keyboard special signs by holding alt key and typing a few numbers, that depends on with sign you want to use. Does it work with linux in the same way?
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120
votes
11
answers
151k
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Undo an "rm -rf ~" command?
I had a folder I didn't want named '~', so from the command line I typed
rm -rf ~
and accidentally deleted my home folder (since ~ resolved to /home/username). Is there any way back or do I ...
- 1,859
116
votes
13
answers
306k
views
How to create a video from images using FFmpeg?
Is it possible to use ffmpeg to create a video from a set of sequences, where the number does not start from zero?
For example, I have some images [test_100.jpg, test_101.jpg, test_102.jpg, ..., ...
vailen
97
votes
6
answers
188k
views
how to download dropbox files using wget command?
Seems I can only download dropbox files using explorer such as chrome and firefox. If I use wget to download, then I would get a file which is in html format. Why?
For example you can open this link ...
- 2,299
82
votes
4
answers
102k
views
How to set path for sudo commands
If I issue
sudo my-command
how does Linux look for that my-command?
The my-command is in my PATH. I can invoke it without any problem. However, when I invoke it with sudo, I'll get command not found.
...
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71
votes
13
answers
19k
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How is Linux not prone to viruses, malware and those kinds of things?
How is Linux protected against viruses?
This question was a Super User Question of the Week.
Read the blog entry for more details or contribute to the blog yourself
- 954
69
votes
6
answers
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Boot from USB using GRUB
My friend's laptop was in a car accident (he's fine!). However the laptop is very old its an Acer Aspire 1520 the CD-rom drive is broken and there is no floppy drive.
I made him a USB boot before I ...
- 789
63
votes
12
answers
58k
views
How to convert a 1 page PDF to a 2 page per sheet PDF?
I would like to print a PDF so that on the front of the first page are the first two pages, on the back the 3rd and 4th and so on.
----------------- -----------------
| | | ...
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votes
6
answers
118k
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command not found when using sudo
There are a few question on the site that seem related to my problem but I could not find a solution in any of them.
My operating system is Ubuntu 12.04. I have mvn installed in /tools/noarch/apache-...
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58
votes
5
answers
106k
views
How do you check how much power a USB port can deliver?
Some laptops have a special USB port that can deliver more power than the other ones. However it is not always easy to identify which one is the good one, nor how much power it can deliver.
So is ...
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