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

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2
votes
1answer
29 views

Can I emulate graphical DOS applications inside a TTY?

Can I play DOS games inside a hard terminal (like the ones that open with Control+Alt+F1)? I want to be able to close the Xsession because the PC I'm doing this is on is really slow. The PC has ...
2
votes
1answer
14 views

Differences between “<command> < /dev/null &> /dev/null & disown” and “nohup <command> & disown”

This is my understanding about the usage of &, disown and nohup: <command>: runs the process within the Terminal's current bash instance, in the foreground (i.e. the process is listed as a ...
-1
votes
2answers
18 views

When to use adduser or useradd

The Question consist of three parts What are the differences between them When to use adduser or useradd and why there is more than one command for the same purpose
4
votes
4answers
191 views

How do you make your terminal play a sound or offer a notification when it has finished executing its command?

I do sudo apt-get update from time to time, and find it frustrating to have to check when it is done doing its thing. Is there anyway I can get it to offer a notification popup or play a sound when it ...
1
vote
1answer
25 views

When one disables the root account via the terminal, what output can one expect?

When I used Ubuntu for the first time, my friends told me to enable the root account, and I enabled it. But, I know that I already reinstalled Ubuntu few times, but in this last time, I don't know if ...
0
votes
3answers
33 views

Get Parent ID of last process executed in terminal

back to this How do I find the PID of the last open file in terminal? I want to know the PPID (parent id of the process) of the last executed process.
3
votes
1answer
36 views

Find the properties of an mp3 file via command line

Is it possible, via command line (shell command), to check for properties of a file (like when I right click on a file via Nautilus). Specifically, given an mp3 audio file, I would like to know how I ...
0
votes
1answer
30 views

How do I find the PID of the last open file in terminal?

How to know the PID of the last open file (process) using the command line?
6
votes
5answers
232 views

Exit terminal after running a bash script

I am trying to write a bash script to open certain files (mostly pdf files) using the gnome-open command. I also want the terminal to exit once it opens the pdf file. I have tried adding exit to the ...
0
votes
1answer
18 views

How to compare float variables in awk?

awk -F, 'NR==FNR{c[$29]=$29;next} NF{print $29 ((c[$29]==$29)?" ":",mismatch")}' $file1 $file2 The value of 29th field, i.e., $29 in file1 was 832.9 and that of file2 was 832.9000. If I compare them ...
8
votes
5answers
737 views

How do I list all sudoers?

I want a command to list all sudoer users in Ubuntu 12.04. In other words, how could I list all users who have sudo ability? Suppose I'm a sudoer user. How could I know all other sudoer users?
0
votes
1answer
18 views

I seem to not have a terminal [on hold]

I am not able to find the terminal, even when I press Ctrl+Alt+T, could it be because it didn't download with my OS? Or is it something else? I am running Ubuntu Unity, and this I am a newbie.
2
votes
2answers
198 views

How to output the linux command and the returned result in the same text file?

All the commands I've seen so far look like command > file or command >> file, which output the result to the designated file. For instance, when I type openssl version > lab4.txt, all I ...
0
votes
1answer
25 views

How to copy and paste a file through the command-line? [duplicate]

I want to copy and paste a file to /usr folder but I guess I need root access to do so so I need to learn how to copy and paste a file from one location to another through the terminal.
0
votes
1answer
22 views

.bashrc edit messes up terminal command arrow-up history print

I wanted to give my terminal prompt in Ubuntu a more personal look, and wanted to change the text prior to the '$' when writing a command. From what I've found this is done by editing the .bashrc ...
2
votes
0answers
27 views

/bin/sh: 0: can't access tty; job control turned off

I'm building a custom image to run on a simulator. the kernel boots fine and everything but generates this warning: /bin/sh: 0: can't access tty; job control turned off and the terminal does not ...
4
votes
1answer
40 views

How to batch process JPG images to change its quality with Nautilus-Actions?

First of all: Thank you for taking the time to read this and provide some help. Any advices are appreciated. I am using Nautilus-Actions in order to add a custom context menu's action in order to ...
0
votes
0answers
50 views

/usr/bin/ld: cannot find -l

I wannt to install a program on my Ubuntu (Ubuntu 12.04) but when I type "make" in Terminal, it has errors: /usr/bin/ld: cannot find -lgeant321 /usr/bin/ld: cannot find -lkernlib /usr/bin/ld: cannot ...
4
votes
1answer
284 views

How do I completely clear a terminal window

The commands of clear, Ctrl+L, or reset are not adequate. They do not clear my terminal screen, they just seem to scroll the window down so I can't see everything above. I want it so that I can't ...
2
votes
1answer
36 views

How do you add/remove applications to/from the Unity Launcher from command line?

I am customizing an Ubuntu 14.04 Live CD with UCK (Ubuntu Customization Kit). The program gives you a chroot environment in a terminal to make changes. I want to add and remove what programs appear ...
0
votes
0answers
16 views

How to run a script when a directory is changed by another user?

I know has been a bit of discussion about topics similar to this. But here is what I am basically trying to do. I have a watch directory called and whenever a file is added to that directory, I want ...
4
votes
3answers
218 views

How to make an icon to enter terminal commands

Let me start by saying that I'm very new to Ubuntu in general, so I realize this may be a basic question. I'm using xubuntu 14.04. I recently got a wireless usb working by following the steps here. ...
0
votes
1answer
15 views

Problem installing Terminology terminal emulator

When trying to run/install Terminology on Ubuntu 14.04 I get the following error symbol lookup error: /usr/local/lib/libecore_evas.so.1: undefined symbol: _eina_log_state_shutdown I guess the ...
1
vote
1answer
40 views

Terminal commands for volume [duplicate]

I have a very simple question: What is the terminal command for changing the volume? I ask because I want to set a keyboard shortcut via the keyboard settings and I need the terminal command for it.
1
vote
2answers
167 views

“find: missing argument to `-exec'” when using “-exec rm -f {}\”

I run this command: ~/shell_temp$ find . -type f -name "IMAG1806.jpg" -exec rm -f {}\ i got output below: > IMAG1806.jpg Error: find: missing argument to `-exec' what is exact command for ...
0
votes
0answers
26 views

Installing Missing Commands [duplicate]

I am trying to learn linux commands and one particular thing I could not seem to find was; say a command like "split" is missing, how would you install it?
5
votes
1answer
39 views

How do I restart a wget download?

I use the wget application. One file has stopped downloading. How can I stop the download and start the download again? Here's the log for wget $ tail -f wget-log 287350K .......... .......... ...
1
vote
1answer
23 views

bash file for managing public private and history of website

I have a website and i have 3 versions I have the beta version with the most recent and usually not fully working changes. I have the public site that is on www. lastly, i have the history that I ...
0
votes
2answers
51 views

Moving folders in Terminal [duplicate]

I'm trying to move a folder into another folder in terminal, but when I enter this line: mv South_America /North_America South_America just completely disappears. It didn't move into the ...
3
votes
6answers
123 views

How to search for specific lines in Linux? [duplicate]

I recently received an error telling me that there was a problem on line 52. I am trying to learn what the best method is for finding lines instead of actually counting them. In Windows, I often used ...
0
votes
0answers
7 views

'LIBXML2_2.9.0' not found (run PHP-file with shell_exec)

I wrote a PHP-script to execute another PHP-file in the terminal and got an error. If I run: $output = shell_exec("/usr/bin/php -v 2>&1"); echo "<PRE>$output</PRE>"; then I get ...
0
votes
1answer
25 views

how find the list of programs installed using the command line and how to get uninstall them [duplicate]

I have installed the ubuntu 14.04.2 LTS recently. I have used the terminal to install some music packages. But i dont no how many music packages that i have installed.So can any one help me with the ...
0
votes
1answer
23 views

how to set socks5 proxy in the terminal

I am a beginner using linux, I would like to connecting the terminal to the local proxy socks made by my ssh (Dynamic Port Forwarding), so is there a way to set up a proxy socks5 in the terminal? or ...
5
votes
1answer
80 views

What do these commands from a shell script do?

I'm just starting to learn bash. I have the following script, and I would like to know what does the following commands do in order to start to understand a little bit this world. if [ ! -w "." ] ...
1
vote
3answers
42 views

mv command with *-wildcard shows error “No such file or directory”

I have 6 .txt files on my desktop that I am trying to move using the Terminal. However when I try to mass move them all into the texts folder that is on my Desktop, I get the the following error: mv: ...
11
votes
2answers
819 views

What does this 'apt-get remove' instruction do?

What does the following code do? I found it on internet so I copied it and pasted it into terminal but when I installed a new kernel it only detects the old one. sudo apt-get remove --purge $(dpkg ...
3
votes
1answer
74 views

Can't see my files with “ls” anymore

HELP! I think I broke my DESKTOP :/ I was playing around with the Terminal and trying to practice moving, renaming, and copying files when I think I screwed something up. I was attempting to move ...
1
vote
1answer
23 views

How to change default browser AND the command line parameters used to open a link from gnome-terminal

I basically have the same question that was answered over here: How do I change the browser that gnome terminal opens links with? Except I am running on Ubuntu 14.04 and am interested in customizing ...
4
votes
1answer
141 views

Writing a program that will demo the $PS2 variable

I've been customizing my terminal prompt, and found that it's possible to change the "secondary prompt". However, I have no way to test the changes I make to this one so I was wondering if a simple ...
1
vote
1answer
33 views

How do I get nohup to execute [double-]quoted inner commands?

Let's say I want to run echo nested into watch nested into nohup. Starting from the bottom of the stack: echo test No problems with that. watch -n 1 'echo test' watch -n 1 "echo test" No ...
2
votes
1answer
24 views

No polish signs in terminal

I have changed my .bashrc file, so that $LANG variable is always set to en_US when I run new shell. This is because I have a program for making plots which takes the sign as a decimal separator based ...
1
vote
0answers
20 views

all my previous configurations and settings are gone by using the following command in ubuntu 14.04LTS

I used the command rm -rf ~/.Trash/* to empty the trash but when the command is executed, all my files in Download folder are deleted and all my Ubuntu settings are changed. Can anyone please help, ...
0
votes
2answers
21 views

why i why i can't kill viber?

i cant kill viber process in terminal. $ pkill Viber or $ pgrep Viber 2849 $ kill 2849 or $ killall -v Viber Killed Viber(2849) with signal 15 not work ! but in System Monitor by ...
9
votes
5answers
540 views

Most efficient way of launching and separating a program from the terminal?

I'm trying to launch a program from the Terminal in such a way that the following occurs: Closing the Terminal does not close the program The program is not outputting anything to the Terminal and ...
4
votes
4answers
296 views

Get previous commands in Terminal that match the currently typed command [duplicate]

In some terminals you can do something like this... Type some command nmap -sn 192.168.1.1/24 Then go on to do other things in the terminal for a while. Then later you can type nmap and then ...
0
votes
0answers
8 views

The disk drive for /u01 is not ready yet or not present

when i boot i see this message The disk drive for / is not ready yet or not present. Continue to wait, or Press S to skip mounting or M for manual recovery. i want solution to remove this message and ...
-1
votes
0answers
24 views

My terminal disappeared not for a reason xD [on hold]

I have installed linux 12.04 come with my O.S. And i go to do operations type install programs with sudo command using the terminal. But not for a reason that i know the terminal disappeared. Also ...
3
votes
0answers
50 views

Configure Linux Text mode Size (Rows and Columns)

I'm having issues with controlling the size of a text-mode program. This is a database program (Dataflex) that I recently had working on Windows 98 DOS mode and now am moving it to Linux. I have ...
0
votes
2answers
70 views

Enforce a shell script to execute a specific python version

Update. Changing the alias unfortunately does not work. I have changed the alias to alias python='/usr/bin/python2.7' however the shell script still runs the python script in 2.4.3. Muru - I am ...
2
votes
1answer
22 views

Xresources not working properly after restart

I am trying to change my xterm theme using a hack in Xresources which i found in this website. i have created a Xresources in my home dirctory and entered the below code. XTerm*faceName: Bitstream ...