Questions about using the command-line interface (CLI).

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57
votes
4answers
69k views

How can I get a list of all repositories and PPAs from the command line?

I know how to list all packages installed on my system. But how could I get a list of all repositories and PPA's? I know I can look into /etc/apt/sources.list and /etc/apt/sources.list.d, but I'm ...
67
votes
4answers
85k views

Find and replace text within a file using commands

How can I find and replace specific words in a text file using command line?
47
votes
7answers
46k views

How to easily rename files using command line?

One of the ways I quickly rename files in Windows is F2 > Rename > Tab (to next file) > Rename ... But in Ubuntu/Nautilus, I can't tab to next file. But being on Linux, I think there must ...
52
votes
5answers
76k views

How to list all variables names and their current values?

Including not only $HOME, $PWD etc but any other you have defined.
37
votes
4answers
42k views

How to add Android Studio to the launcher?

I'm trying to install the android studio so that I can launch it from a launcher instead of via terminal. Can someone give specific instructions please? I think this is something to do with the ...
21
votes
4answers
36k views

How do I save terminal output to a file?

How do I save the output of a command to a file? Is there a way without using any software? I would like to know how.
28
votes
5answers
10k views

How can I change the default text editor from gedit to vim?

How can I change the default text editor from gedit to vim? When I click on a text file, I want it to open in vim under the terminal instead of gedit.
14
votes
3answers
4k views

How to turn off the display via the command line?

Is there a way to turn off the display (enter power saving mode) using a command? For example, when the computer is inactive for a specific interval, the screen turns off to conserve energy. Is there ...
12
votes
2answers
18k views

How do I log all input and output in a terminal session?

How do I keep logs of all the work done via terminal? For example, I want a record of all the work done on database via terminal.
16
votes
4answers
8k views

Why is moving directories to /dev/null dangerous?

When trying to move a test_dir directory to /dev/null, I get the message mv: cannot overwrite non-directory ‘/dev/null’ with directory ‘test_dir/’ Then why do people say "Don't run the command sudo ...
12
votes
5answers
6k views

Why are letters overlapping in the terminal?

I installed Oneiric as a guest OS in VirtualBox using the Mini CD. I installed the ubuntu-desktop package and everything seems to work fine - well, except for a font issue with the terminal: As you ...
11
votes
3answers
17k views

How do I make the terminal run python 3.1?

Currently, when I type "python" at the terminal I get v2.6 which is all fine and dandy but how can I set it to use v3.1 instead? Is there a "path" variable out there somewhere that I can change like ...
4
votes
2answers
11k views

Terminal method of formatting storage drive

I want to know how to format a storage drive from the terminal. Helpful things to provide in the answer would be often used options for commands and base knowledge that one can use to extrapolate ...
23
votes
2answers
5k views

What does `~/ ` mean?

I'm new to Linux and Ubuntu. People keep using ~/filename in their answers to my questions. What does ~/ mean?
5
votes
3answers
11k views

Create a .desktop file that opens and execute a command in a terminal

I would like to know how to write the Exec command of a .desktop file to open a new terminal and execute a shell script in it. The shell script is working and accessible by all users. When launching ...
8
votes
2answers
405 views

What does // mean in a path?

I was working in my terminal, when I misspelled while cd to root (/). Accidentally, I typed // and I got in terminal: root@weblocalhost://# When i type pwd, i get response // but when I type ls -s ...
135
votes
9answers
6k views

How do I delete my commands quickly?

I use terminal for almost all tasks. Let's say I have entered a huge command like this: sudo a-huge-command What is the easiest way to delete the whole command with a single shortcut, rather than ...
82
votes
20answers
10k views

Are there any games which can train people to learn terminal commands? [closed]

It seems to me learning how to use the terminal is a prerequisite to learning how to use Ubuntu. So I'm trying to figure out the best way to learn. Is there a Quizlet online flash card set out there? ...
107
votes
14answers
241k views

How to send mail from the command line?

How to send mail from the command line?
45
votes
6answers
91k views

Browsing the internet from the command line

How can I browse the internet from the command line in Maverick?
22
votes
10answers
17k views

Command line audio players

What are popular audio players for the command line? How to play a single sound file? Are there command line players that also index the music library like Banshee, Exaile, etc.?
35
votes
5answers
44k views

Browse internet inside terminal

Is there any other package other than elinks so that I browse internet inside the terminal using terminal as a browser. I feel elinks is a bit difficult to operate.
20
votes
3answers
11k views

How to show ascii art at the top of the terminal when it's opened?

As you can see on this screeshot of Mik's Guake he have a statup message of ascii art when he opens it, and that's what I'd like to do, can someone help me?
41
votes
2answers
47k views

How to get disk usage from command line?

How can I get the current disk usage (in %) of my hard drive from the command line?
26
votes
2answers
1k views

Write command in one terminal, see result on other one

I want to run a command foo on one terminal and pass the result to another terminal. Is it possible to do this ?
26
votes
1answer
32k views

What do the STAT column values in ps mean?

In the STAT column of ps there are a load of letters that don't really make much sense. What do they mean? Here's an example of ps aux | head: USER PID %CPU %MEM VSZ RSS TTY STAT ...
30
votes
2answers
251k views

How do I open a terminal? [duplicate]

Possible Duplicate: What is a terminal and how do I open and use it? How do I access the Terminal? I just got ubuntu running on my computer and now I am ready to write a program...but I ...
18
votes
7answers
49k views

Create USB installer to install Ubuntu from the command line?

I'm trying to create a bootable USB image to install Ubuntu on a new computer. I have done this before following the "create USB drive" instructions for Ubuntu desktop, but I don't have an Ubuntu ...
21
votes
5answers
3k views

How to both display a command line's output on console and save the output into a text file?

How can I run sudo apt-get install by BOTH seeing the process of installation (long in my case) and saving its output into a text file ?
20
votes
2answers
12k views

How can I hibernate/suspend from the command line and do so at a specific time

I managed to find out how to suspend/hibernate the system from the command line by reading How can I suspend/hibernate from command line?. However, I would like to know how to use the command line to ...
12
votes
2answers
4k views

How to access gvfs mounts from command line?

I have some samba share mounted via Nautilus and I'd like to access the files from command line. They used to appear under $HOME/.gvfs but not any more. Where have they gone to?
22
votes
4answers
7k views

How can I list all packages I've installed from a particular PPA?

How can I list all packages I've installed from a particular PPA? Command-line answers preferred. Related question: how can I list all installed packages that are not available from the main Ubuntu ...
14
votes
2answers
11k views

How can I create a custom terminal command (to run a script)?

I'm a web developer. When I want to start working, always i'm executing some command on terminal. For example: sudo service apache2 start sudo service mysql start sublime For speed up this process, ...
14
votes
7answers
16k views

How can I start gnome-terminal at a particular directory?

I've tried gnome-terminal -x 'cd /path/to/dir' and gnome-terminal -e 'cd /path/to/dir' but both give me errors when the new terminal opens. How do I get a new terminal to start in a specific ...
16
votes
6answers
23k views

Home directory not being created

I am trying to understand system administration on Ubuntu. So, as an example, I create a dummy user using sudo useradd -d /home/linda linda and passwd to create the password. I check that an entry ...
13
votes
4answers
404 views

How can I get a list of all packages in a repository section from command line?

In Synaptic, one can list packages by section. For example, in the image below all packages of the "Amateur Radio (universe)" section are listed. How can I get such a list (edit: with package ...
13
votes
1answer
8k views

What commands are needed to install Ubuntu Core?

Ubuntu Core's wiki page page contains the instructions to install Ubuntu Core on a target media: Uncompress (do not unpack) rootfs Format target media: at least one partition should be ext2, ...
7
votes
2answers
41k views

How to connect to Wired internet connection through terminal?

I am using Ubuntu 10.04 with KDE on it. I am facing a problem in connecting to wired LAN internet connection. Can any one tell me the procedure on how to connect to wired LAN internet connection ...
14
votes
5answers
131k views

What is a command to compile and run C++ programs?

I am new to Linux. I am using Ubuntu 11.04 and do not know how to compile and execute C++ program in it. I need to know the commands to Compile and Execute a C++ program in Linux.
8
votes
7answers
4k views

how to shift applications from workspace 1 to 2 using command

Is there any way I can switch the application running in one workspace to another on command line? I use Ubuntu 10.04 UPDATE1 As per suggestions below wmctrl -l 0x02200003 -1 bond Bottom ...
7
votes
1answer
519 views

How can I run a command and copy its output?

I've been asked to run a command and copy and paste the output but I have no idea where to start. What do I do?
12
votes
3answers
12k views

How do I resize partitions using command line without using a GUI on a server?

I only access the server via terminal and I can't use graphical tools such as gparted! I need it because I want to create a new partition from a part of root about 768mb to create a swap partition. # ...
12
votes
3answers
19k views

“No such file or directory” when invoking java

I'm trying to re-install Oracle JDK 7 32 bit to 64 bit Ubuntu (previously 64 bit JDK was installed). JDK is currently present at /usr/lib/jvm/jdk1.7.0. I invoke sudo update-alternatives --remove ...
12
votes
4answers
16k views

Opening a file from terminal

When we want to open an application or file from the terminal, we type, say, okular file.dvi This opens the application, but also shows the status of the application. We cannot close the terminal, ...
11
votes
3answers
962 views

What does $PATH mean?

I am trying to install something and among the steps there was this one: "Place it on your $PATH" What does this mean? What is that? I have searched both this site and on Google but everyone just ...
8
votes
2answers
11k views

Install restricted drivers in command line

I'm aware there's already been a question and answer regarding Nvidia drivers, but my case is a little different. My wireless adapter's driver is proprietary, and for a minimal install, I need a ...
20
votes
3answers
3k views

Where can I find the command line?

A basic question: Where do I find the command line? There is a lot of information about commands and using the command line, but I'm an absolutely new Ubuntu user: I can't find find the command line. ...
13
votes
5answers
17k views

How do I insert a line at the top of a text file using the command line?

I want to insert text at the top of an already existing file. How can I achieve this. I tried echo and tee but was not successful. I was trying to insert repo line at the top of sources.list file ...
13
votes
4answers
11k views

How do I get the version of an application from the command line?

I would like to know how to get the version information of an installed program that doesn't have the --version or -version method implemented.
5
votes
2answers
609 views

Generate a list of available commands and what each does

Does a Linux command set with descriptions exist on the net? I have a list of commands i obtained by using alt! with 1947 commands listed. I put these into a file but I am having to write what each ...