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2 answers

What do the symbols displayed by ls -F mean?

I noticed that if I run ls -F on a directory, some of the entries have a * or a @ after them. spuder@ubuntu:~$ ls -F /sbin acpi_available* getpcaps* lvmconf* ntfscp* start-stop-daemon* agetty* getty* …
spuder
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100
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4 answers

How to specify key in SSHFS?

I've got a question that I've not been able to find an answer for. I have two computers, both of which run Ubuntu Linux 12.04. I have set up my first computer ("home") to be able to SSH into my second computer ("remote") using public/private RSA key…
J L
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11 answers

How to view a binary file?

From what I understand, a compiler makes a binary file that consists of 1's and 0's that a CPU can read. I have a binary file but how do I open it to see the 1's and 0's that are there? A text editor says it can't open it... P.S. I have an assembly…
Martin Zeltin
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100
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2 answers

Difference between .xinitrc, .xsession and .xsessionrc

I found three configuration files. .xinitrc .xsession .xsessionrc I know that the first one is for using startx and the second and third are used when using a display manager. But what is the difference between the last two?
lockdoc
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100
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2 answers

Why do we need to use visudo instead of directly modifying the sudoers file?

I understand that if you want to modify who can use sudo and what they can do with it that you should use visudo. I know I'm not supposed to directly modify the /etc/sudoers file myself. What is it that visudo does that directly modifying the file…
Dason
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100
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13 answers

Do I need swap space if I have more than enough amount of RAM?

From what I understand, the purpose of a swap partition in Linux is to free up some "not as frequently accessed" information from RAM and move it to a specific partition on your harddrive (at the cost of making it slower to read from or write to),…
IQAndreas
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100
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2 answers

Difference between 'echo' and 'echo -e'

What is the difference between echo and echo -e? And which quotes ("" or '') should be used with the echo command? i.e: echo "Print statement" or echo 'Print statement'? Also, what are the available options that can be used along with echo?
Venkatesh
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100
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2 answers

What is kernel ip forwarding?

I have seen on many blogs, using this command to enable IP forwarding while using many network security/sniffing tools on linux echo 1 > /proc/sys/net/ipv4/ip_forward Can anyone explain me in layman terms, what essentially does this command do?…
Madhur Ahuja
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100
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16 answers

sort but keep header line at the top

I am getting output from a program that first produces one line that is a bunch of column headers, and then a bunch of lines of data. I want to cut various columns of this output and view it sorted according to various columns. Without the headers,…
jonderry
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4 answers

How can I add an application to the GNOME application menu?

I have an application that I start only from the command line. How can I add the command (and preferably a nice logo) to Gnome's application menu?
mart
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99
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4 answers

Replacing only specific variables with envsubst

I'm trying to perform environment variable replacement through envsubst, but I want to only replace specific variables. From the docs I should be able to tell envsubst to only replace certain variables but I'm failing to be able to do that. For…
João Angelo
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99
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10 answers

How to work around "Release file expired" problem on a local mirror

I have a local mirror (created with debmirror), and when I run apt-get update after a few days, I get this: E: Release file expired, ignoring file:/home/wena/.repo_bin/dists/sid/Release (invalid since 14h 31min 45s) How do I work around that?
tshepang
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99
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5 answers

How to create a simple .txt (text) file using terminal?

I'm just trying to review basic terminal commands. Having said that, how do I create a text file using the terminal only?
Mike Wentworth
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99
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5 answers

Recover cron jobs accidently removed with crontab -r

I entered crontab -r instead of crontab -e and all my cron jobs have been removed. What is the best way (or is there one) to recover those jobs?
Teerath Kumar
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8 answers

Into which directory should I install programs in Linux?

I want to install a program in Linux and run it as a daemon. (Team Speak 3 in this case, but the question is general in nature). There is no package provided, only tarred binaries. Where in the directory structure should I put such a program by…
Eiver
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