The command-line is the interactive interface to your shell.

learn more… | top users | synonyms (1)

1
vote
1answer
52 views

Get file names in awk result

I have many files in a location where I need to list file names in which 32th column has value more than 3000. This is the command that gives me those records: awk -F, '$32 > 3000' * Now can ...
2
votes
1answer
32 views

How to install / parse build dependencies from debian/control?

Let's suppose you downloaded a source code folder, that contains an existing /debian/ folder as well as /debian/control file. Let's suppose the package in question is not in Debian official ...
8
votes
4answers
12k views

How to use /dev/fb0 as a console from userspace, or output text to it

So I have a Palm Pre (original P100EWW) model that I enabled developer mode on, and installed a Debian Squeeze chroot. Works great. I have plans to use this for ANYTHING (bittorrent peer, web ...
3
votes
2answers
97 views

how to recall last argument in bash with vi setting

I use set -o vi setting in bash. The shorcut Alt+. (recalling last argument of previous command) here doesn't work as in emacs mode, so what is the equivalent for vi?
4
votes
1answer
7k views

How to make a Desktop “shortcut” that opens the terminal but under a different directory than the default home?

Objective I am looking for an easy way to consistently run a terminal that automatically opens to a specific directory. Is there a way to do that without changing the default directory? Preferably I ...
5
votes
8answers
707 views

Remove last character from an echo variable

This script works great and I modified it to increment by 5. My problem is I do not need the last comma at the end and I'm not sure how to remove this. for ((i=1, j=0; i <= 12 ; i++, j=j+5)) do ...
-2
votes
2answers
55 views

Can I copy multiple directories into a single directory with a single command?

I have used photorec to recover data from a HDD and now have many directories /home/ray/recup_dir.1, to /home/ray/recup-dir.598 taking up valuable space in my Home directory. I want to copy them ...
2
votes
4answers
59 views

How can I lock myself out of a linux box with iptables?

In the Securing Debian Howto I read (about iptables): The tools can easily be misused, causing enormous amounts of grief by completely crippling network access to a system. It is not terribly ...
1
vote
1answer
28 views

How do I merge (without copying) two directories? [duplicate]

I have: $ find 1 2 -printf '%i %p\n' 40011805 1 40011450 1/t 40011923 1/a 40014006 1/a/e 40011217 1/a/q 40011806 2 40011458 2/y 40011924 2/a 40013989 2/a/e 40013945 2/a/w I want: <inode> ...
1
vote
1answer
28 views

Can't boot Voyager Linux based on Xubuntu

I recently installed Voyager Linux, an linux distribution based on Xubuntu. The problem is that I cant boot it anymore. I have a dual boot system with Windows 8.1, but that's not the problem. I ...
0
votes
0answers
30 views

Pipe to `ls` Not Working as Expected [duplicate]

When I issue: [dave@dhost ~]$ which tar | ls -l I get the output of ls -l of the pwd. I expected to get: -rwxr-xr-x. 1 root root 395472 Feb 21 2013 /bin/tar Why doesn't the pipe work as I ...
2
votes
1answer
57 views

What is the algorithm that the `iw` command uses for choosing an Access Point for a given Wifi network?

Suppose I am in an area with a lot of Wireless AP's for a particular SSID. If I run the command sudo iw dev wlan0 connect <ESSID> How does iw decide which AP to connect to? It does not seem ...
3
votes
2answers
78 views

closing parent process(terminal) doesn't close a specific child process

I'm new to Linux and so far,I have come to understand that if we open a new process through a gnome-terminal eg: gedit & "& for running it in background", then if we close the terminal, gedit ...
1
vote
0answers
29 views

Unable to create a configuration directory for [FishShell] Please set the $XDG_CONFIG_HOME variable

I'm getting this error when starting fishshell: melanie:~ melanie$ fish fish: Unable to create a configuration directory for fish. Your personal settings will not be saved. Please set the ...
2
votes
2answers
75 views

Outputting common lines from 2 files and uncommon lines from both the files in one output file

I have 2 text files. Lets name them file1.txt and file2.txt file1.txt is as follows chr10 181144 225933 chr10 181243 225933 chr10 181500 225933 chr10 226069 255828 chr10 255989 267134 ...
3
votes
1answer
1k views

Read out pulseaudio volume from commandline? (I want: “pactl GET-sink-volume”)

I want to read out the volume level I can set with pactl set-sink-volume $SINK $VOLUME Is there an easy way to do that? As easy as the hypothetical pactl get-sink-volume $SINK ? (What I'm ...
2
votes
1answer
47 views

Concatenate and pass as parameter, bash

Need some help with removing default gateway. For example, there is an IP 192.168.4.15 with default gateway 192.168.4.14. I connect to WLAN with gw 10.0.0.1 and after that I would like do remove ...
1
vote
3answers
66 views

Extract lines with specific dates and execute a command on each of them

I'm using a Google Drive command-line script that can return a list of files such as: Id Title Size Created 0Bxxxxxxxxxxxxxxxxxxxxxxxxxx ...
1
vote
3answers
45 views

Running background process with screen command in xshell

screen command is a nice program for us to run process background, but I found Ctrl + a w do not show screen windows list in xshell(Xmanager component) and Ctrl + a k do not kill this screen terminal ...
1
vote
1answer
29 views

How to propagate TSTP while running a program as a different user

I'm running a terminal application via "su" in this fashion: su -c "/path/to/app --args" username This is done from a root context, and 'username' is a less privileged user in the system. The ...
1
vote
2answers
45 views

How to get a positive signal upon the successful completion of a command

For each of the following commands (four in total) I would like get an exception if one of them throws an exception if case of an error. Ultimately, I will run this through Python using os.system(). ...
2
votes
2answers
880 views

Changing gnome terminal transparency with a command in Ubuntu?

How can I change the transparency of the Terminal windows in Ubuntu with a command? I already know about the profile method but want a command so that I can quickly swap between transparent and ...
2
votes
1answer
58 views

Changing the preferences of Gnome-terminal from within the terminal

Is there any way that we can edit the terminal preferences like background, colors, etc., from within the command line itself? The terminal is Gnome-terminal. I'm using Ubuntu 14.04 trusty tahr. I'm ...
0
votes
1answer
24 views

gconftool-2 doesn't refresh with the dbus anymore?

I used to use gconftool-2 to edit keys in this way (here I change the cursor shape in gnome-terminal): gconftool --type string --set /apps/gnome-terminal/profiles/Profile0/cursor_shape ibeam But it ...
11
votes
3answers
547 views

Order of redirections

I don't quite understand how the computer reads this command. cat file1 file2 1> file.txt 2>&1 If I understand, 2>&1 simply redirect Standard Error to Standard Output. By that ...
6
votes
4answers
225 views

Command line shortcuts for changing directory

I'm looking for an easy way to navigate to directories spanning multiple hard drives and want to set something equivalent to a shortcut within the terminal. In Windows I would accomplish this with ...
4
votes
1answer
65 views

Create torrent with files from different directories from CLI

I have a directory structure that looks like: dirA fileA1 fileA2 ... dirB fileB1 fileB2 ... I would like to create a torrent using CLI utilities that contains: dirA/fileA1 ...
2
votes
0answers
91 views

How to use terminal to access iCloud Drive when Finder is not running

I would like to access iCloud drive from Terminal in order to create an emergency backup. Unfortunately, my installation of Mac OS Yosemite is not operational, so I am using recovery mode to create my ...
-1
votes
1answer
48 views

Unzipping several specific files out of many into a directory using the terminal?

I recently installed Linux Mint 17 on my laptop. I had Windows 7 before, and I backed up all of my data onto an external hard drive. Windows 7 crams all of your backup data into a ton of .zip folders. ...
2
votes
1answer
34 views

.desktop file. Correct exec path

I use Fedora. There are a number of programmes packaged in a security spin. Included desktop files work but open the programmes with root priviliges. How can I edit the desktop file shown here to ...
4
votes
2answers
12k views

Command to install linux headers fails

I need to install my linux headers for an Nvidia driver install. But I get an error when doing so: peter@peter-deb:~$ sudo apt-get install linux-headers-$(uname -r) Reading package lists... Done ...
1
vote
1answer
61 views

How to permanently enable scl CentOS 6.4?

I installed a newer version of devtoolset (1.1) and was wondering how I would go about permanently setting these to be default. Right now, when I ssh into my server running CentOS, I have to run this ...
23
votes
5answers
19k views

Is it possible to mount a gzip compressed dd image on the fly?

I like create an image backup for the first time I'm backing up a system. After this first time I use rsync to do incremental backups. My usual image backup is as follows: Mount and zero out the ...
4
votes
1answer
929 views

Mass ID3 tag editor like vorbistagedit?

My favorite tool for batch editing of vorbis comments is vorbistagedit. I can do vorbistagedit *.ogg and it lets me edit the metadata in all my ogg files at once in my favorite editor (emacs). I'm ...
2
votes
1answer
199 views

convert WAV music library to FLAC on command line and achieve best quality

I would like to produce (nearly) perfect FLAC files by verifying/checking all conversion steps. I'm hoping to do this in a single command, although a short bash script would be acceptable as a second ...
9
votes
1answer
2k views

Searching for a command line tagging tool for mp3 and ogg that supports pictures

I am searching a command-line tagging tool that supports ogg- and mp3-tagging and allows to add a picture to the tags. Currently I use lltag but that does not support pictures. dagger is the tool I ...
1
vote
1answer
47 views

how to `echo` 'formatted' man page of some command to text file [duplicate]

When I execute echo `man ls` > tem.txt I get unformatted output in the text file, I mean output without any new lines, just continues sentences. How do I get formatted output ? For example, ...
0
votes
3answers
59 views

What is background and Foreground processes in Jobs

I'm studying Redhat Linux 7, topic Monitoring and managing Linux processes in it I understand Processess and its command. But I do not understand "Controlling Jobs" and Running jobs in the background ...
3
votes
0answers
78 views

Multiple wget calls in a single session?

I have the following code to retrieve a page from a website that needs authentication (it uses Sungard Higher Education authentication): wget --delete-after --save-cookies cookies.txt ...
19
votes
4answers
19k views

Usage of dash (-) in place of a filename

For a command, if using - as an argument in place of a file name will mean STDIN or STDOUT. But in this example, it creates a file with the name -: echo hello > - How can I make - in this ...
0
votes
0answers
22 views

Is there a large performance difference between find and find2perl

Is there a performance difference between find and find2perl? I work for a hosting company and I was told that our admins prefer us to use find2perl over find. Supposedly this is because find is ...
2
votes
2answers
2k views

Try to disable console output, console=null doesn't work

as mentioned above, I want to to completely turn off the console output, but putting console= or console=null in the kernel command line doesn't change a thing. When I enque quiet to the kernel ...
25
votes
5answers
9k views

How do I split a flac with a cue?

I've got a full album flac, and a cue file for it. How can I split this into a flac per track. I'm a KDE user, so I would prefer a KDE/QT way, I would like to see command line and other gui answer's ...
38
votes
5answers
22k views

How can I send stdout to multiple commands?

There are some commands which filter or act on input, and then pass it along as output, I think usually to stdout - but some commands will just take the stdin and do whatever they do with it, and ...
1
vote
1answer
124 views

Invalid back reference using grep

So I am trying to find 6-letter words that consist of one character repeated three times followed by another character repeated three times. For example aaabbb or oookkk. I am trying: grep -E ...
1
vote
1answer
16 views

How do I make an alias to substitute single word in a piped command? [duplicate]

I use aliases a lot but right now only for use cases like alias i='sudo apt-get install -y'. I often would like to add an alias in the following form: alias cmd='echo [something] >> ...
19
votes
5answers
11k views

Filtering invalid utf8

I have a text file in an unknown or mixed encoding. I want to see the lines that contain a byte sequence that is not valid UTF-8 (by piping the text file into some program). Equivalently, I want to ...
18
votes
3answers
5k views

how to download a file using just bash and nothing else (no curl, wget, perl, etc.)

I have a minimal headless *nix which does not have any command line utilities for downloading files (e.g. no curl, wget, etc). I only have bash. How can I download a file? Ideally, I would like a ...
4
votes
1answer
155 views

Untar a specifc folder within tar.gz

How do I untar/uncompress a specific folder within a tar.gz using the terminal/commandline (Ubuntu 14.04 (Trusty Tahr))? Precise: -file.tar.gz -- folder1 -- folder2 How to extract... ... ...
3
votes
2answers
505 views

Jingle CLI client / Jitsi replacement / VOIP

I am looking for a Jingle client for the command line. Currently, I use Jitsi, but my dreams of not needing the GUI for more than just web-browsing are not realized due to my reliance on this ...