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

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2answers
8k views

How to unpack a downloaded tar.bz2 archive?

I downloaded YOONO-Desktop from http://www.yoono.com/, and I try to install it with the following steps: [root@localhost mpatil]# tar xfv yoono-destop-1.8.43.tar tar: yoono-destop-1.8.43.tar: Cannot ...
2
votes
2answers
1k views

Need to copy files to existing directory and remove files already there with the same name but different extension

EDIT: Total rewrite of question for clarity. I have a directory tree (new) with a bunch of files of with an extension of .new. I have an identical tree (old) where many of the files have names ...
4
votes
3answers
385 views

OS X/Linux one-liner/script to find the largest recurring group of lines in a text file?

I have a log containing an execution trace where there is infinite recursion eventually terminating when the stack is too deep. There are enough lines and valid included recursion within the larger ...
3
votes
3answers
2k views

rlwrap: mysql autocompletion not working

Normally, autocompletion works fine in mysql command-line client (mysql-client-5.5). I have a table called booking. When I type the letter b and pres TAB the name of my table gets autocompleted: ...
0
votes
1answer
104 views

Am I running Bash?

I am using OS X 10.8.5. I am trying to figure out if the terminal is running bash. When I type in the following it says "getent" command not found -- but the error message seems to be coming from ...
0
votes
1answer
182 views

How can I get sublime text to run from the command line?

I am trying to get sublime text to run from the command line using this tutorial. It says to run this command: ln -s "/Applications/Sublime Text 2.app/Contents/SharedSupport/bin/subl" ~/bin/subl ...
2
votes
1answer
847 views

What command will generate average lines per minute?

I'd like to know how many average lines are written to a file per minute. Could someone help me with a command or code to generate this number?
0
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0answers
33 views

How to use grep command to find the matching pattern and some more characters? [duplicate]

I have a compressed JS code and I want to find a pattern, but since the file is compresses, it has only a line, and the match pattern is all the file. The output is too much large. grep -r ...
0
votes
2answers
520 views

how to run .dump command in linux? [closed]

I want to create dump file of sqlite database from java but I can't run the below command from linux. I got the help of windows and I tried with linux but it appears one terminal nothing more than ...
6
votes
1answer
1k views

Is there a command such as xwininfo, xdpyinfo, xprop, or xlsclient that will tell me what font an X client window is using?

I'm trying to find a command that will report what font a given X window is configured to use. Does such a command exist? Looking through these tools I did not see an option that would give me this: ...
4
votes
3answers
1k views

What is a “non-option argument”?

I am trying to understand info who but completly fail at the term »non-option argument«. Can someone please explain this term to me in simple words or an example? UPDATE: from ' info who' ...
15
votes
2answers
44k views

Connect to a Bluetooth device via Terminal

I'm using Mint 15 w/ cinammon. I bought a set of bluetooth speakers and i'm tring to connect to them via terminal. Via GUI i can see them normally and i am connected to them. I want to make a small ...
2
votes
1answer
49 views

Piping fragments of a document through various commands

I want to send, maybe using escape sequences such as $$$, fragments of an article through various commands, possibly with modifiers. The stdin would be replaced by the corresponding stdout. (Deleting ...
2
votes
1answer
196 views

Obtaining XWindows GUI menu item/widget names from the command line

I have just learned about dogtail, and it can allow enumeration of menu items/widgets of a GUI application from the command line; for instance (via Testing/Automation/DogtailTutorial - Ubuntu Wiki): ...
3
votes
3answers
801 views

Command line options of rackup are not shown in ps output or procfs

As you know if you wish to get command-line runtime arguments for running command you can parse ps -e or /proc/<pid>/cmdline. But I have encountered issue when this method returns only command ...
1
vote
1answer
478 views

How can I finding the Modify/Access/Change time of a file or directory? [closed]

I am using Debian 7.2 and would like to know the shell command for finding the MAC time of a file or directory. I tried man -k "MAC" and got a lot of hits about macros. I then tried man -k "MAC ...
0
votes
1answer
45 views

In which way is a commented line active in a program file?

To solve the bug reported here the solution seems to be commenting, not just adding a certain line in a file - as explained here and here. That is - to make that bug disappear in Xfce, a certain line ...
4
votes
4answers
15k views

How exactly do I create a sed script and use it to edit a file? [duplicate]

I know how to edit a file using sed one step at a time, but how would I create an actual sed script and then use it on the file to do the same things that the individual sed commands would do? For ...
1
vote
2answers
381 views

How would I use sed to detect a certain amount of numbers before it inserts a character? ###-###-####

I need to format phone numbers in a text file. They appear as (example) 8014516912 How would I format it so that I can insert a - after the first 3 numbers, and then another - after another 3 ...
1
vote
1answer
198 views

How to pass wildcards in command line [closed]

So this works: foo -a -b -c "path/file.ext" And this too if I want to pass all files from directory: foo -a -b -c path/* But if I add the quotes foo -a -b -c "path/*" It doesn't work anymore: ...
33
votes
6answers
28k views

How can I see dmesg output as it changes?

I'm writing a device driver that prints error message into ring buffer dmesg output. I want to see the output of dmesg as it changes. How can I do this?
5
votes
2answers
11k views

Having trouble uncompressing a few files [duplicate]

So I have to uncompress 4 different files. When I do file file1 file file2 file file3 file file4 for example, different messages are displayed. For example one starts like "gzip compressed data, ...
5
votes
3answers
8k views

How to find and count how many files contain a certain word?

I am supposed to find and display the count of the number of files that contain the word carrot (case ignored) So far this is what I have, I am just not sure how to add the wc into it to count how ...
5
votes
1answer
157 views

Do not set $? to non-zero on Control+C

My $PS1 in Zsh includes this expression: %(?. %?.) It means «if exit code of previous command ($?) is true, show $?, else show nothing». This is generally useful, but one thing annoys me: shells set ...
2
votes
2answers
245 views

Is there a (relatively) safe way to run CLI commands from the web?

Since I started programming LAMP apps I wanted to develop an admin control panel for my boxes. (For fun and educational purposes, otherwise I would use something already existing in the market) But ...
6
votes
2answers
9k views

cp -L vs. cp -H

Problem When copying files with cp -H or cp -L, I get the same results: $ ls -l fileA fileA -> fileB $ cp fileA somewhere/ -H $ ls -l somewhere/ fileA # fileA is a copy of fileB, only ...
19
votes
4answers
16k views

What is the purpose of the 'install' command?

I've seen the install command used in a lot of Makefiles, and its existence and usage are kind of confusing. From the manpages, it seems like a knockoff of cp with less features, but I assume it ...
6
votes
2answers
3k views

Ignore “other” domains when downloading with wget?

I would like to crawl links under www.website.com/XYZ and only download the links that is under www.website.com/ABC. I am using the following wget command to get the files I want: wget -I ABC -r -e ...
1
vote
2answers
5k views

why can't linux see my run.sh command?

I have a run.sh in a directory in ubuntu linux 12.04 LTS. I've been changing the Path variable so that it can "see" binaries elsewhere in the directory structure. But I am still getting a command not ...
2
votes
1answer
572 views

Merging folders with practically the same name but different casing

When digging around in the advanced settings in Dropbox I lost a folder. I only discovered this about a month later. I managed to get this folder back from Dropbox however the file structure of the ...
2
votes
1answer
196 views

Any better method than this for sorting files by their creation date?

I needed to display a list of directories sorted by their creation date and I came up with this code snippet that I thought was kind of clever. Is there a more obvious way to do this that I'm missing? ...
48
votes
3answers
24k views

Find out current working directory of a running process?

What command(s) can one use to find out the current working directory (CWD) of a running process? These would be commands you could use externally from the process.
0
votes
2answers
10k views

What does the commands sudo, apt-get, install, and fakeroot stand for? [closed]

I am a newbie to Linux and I am trying to build a custom kernel on ubuntu and I saw this document and it said I needed to install the packages https://help.ubuntu.com/community/Kernel/Compile To ...
2
votes
1answer
74 views

Is there a way to get apt-get to install from different distributions in one single command?

I'm building a package from source in Debian Wheezy, which has a few build-deps that cannot be satisfied by stable. Therefore, I use a few packages from unstable, testing and wheezy-backports. The ...
8
votes
4answers
3k views

Recursively add a file to all sub-directories

How do I recursively add(or touch) a file into the current directory, as well as all sub-directories? For example, I would like to turn this directory tree: . ├── 1 │   ├── A │   └── B ├── 2 │   └── ...
5
votes
1answer
126 views

How can I get information about my virtual desktops via the command line?

I'm curious how I can get information such as the dimensions of my desktop, which desktop is currently active, and what labels (if any) are set for my desktop enviornment (DE).
5
votes
3answers
3k views

convert soft- to hardlinks with cp

The cp command's infopage offers on the option --preserve= the following: links Preserve in the destination files any links between corresponding source files. Note that with -L' ...
6
votes
7answers
4k views

What is the easiest way to add a string on the beginning of every line of the file from the command line?

I am looking for a way to add some string to the beginning of every line (same string for every line). Not something customizable but rather something that will be easy to remember and available on ...
1
vote
1answer
160 views

What is the use of ; in a single line command?

What does ; mean in single line scripts like this: while true; do sudo -n true; sleep 60; kill -0 '$$' || exit; done 2>/dev/null & Does it mean new line, or "next command"?
0
votes
1answer
610 views

Get a clean list of files transferred from rsync

I'm trying to get an itemized list of files transferred by rsync. Using the -i and --out-format options, I'm instead ending up with output that looks like this: 3HMP1MO_001.tif 974.68K 100% ...
1
vote
1answer
909 views

Hide a file extension using Terminal

I have about 40 files in my folder. I selected all the files and pressed command+I. Instead of opening one Get Info window, my Mac shows up 40 windows! Is there a terminal command to hide the file ...
1
vote
1answer
2k views

stdin : is not in tty

I am trying to make backup from server1 to server2 by using below command in ssh [user1@server1 ~]$ mysqldump -u dbuser -p"dbpwd" --opt dbname \ | gzip -c ...
1
vote
1answer
100 views

vim flag to append a line and save

I'm trying to mock an editor as part of writing feature tests for a CLI that I'm working on. I need to mock an editor which is opened and quit directly without saving, as well as an editor which ...
4
votes
1answer
147 views

Computing the visible area of a partly hidden window

I have to (scriptly) take screenshots of windows, some of which may be partially or fully hidden by other windows. Of course, in such a case the screenshot is useless, and I'd rather print a warning. ...
0
votes
4answers
5k views

-bash: syntax error near unexpected token `;' [duplicate]

What is the correct format for if then? I tried lots of varieties. Should the format work at the command line when not in a program? $ if [1==2] then echo "y" fi; > ; -bash: syntax error near ...
22
votes
4answers
107k views

Connecting to wifi network through command line

I am trying to connect to my WEP network just using the command-line (Linux). I run: sudo iwconfig wlan0 mode Managed essid 'my_network' key 'xx:xx:... hex key, 26 digits' Then I try to obtain an ...
2
votes
1answer
2k views

Bash Commands not working on Mac

Hello I open my terminal window on Mac Os 10.6.8 as I am trying to update my ruby to 1.9.3 and the terminal gives me this response immediately as I open it: -bash: export: ...
3
votes
2answers
842 views

How does Debian make use of lots of CPU cores?

I just got an account on a 24 core VPS (according to UnixBench there are 24 CPUs). In general terms, how can I make good use of all these cores for general purpose shell computing in Debian? Do I ...
17
votes
3answers
9k views

Use & (ampersand) in single line bash loop

I have been using this command successfully, which changes a variable in a config file then executes a Python script within a loop: for((i=114;i<=255;i+=1)); do echo $i > numbers.txt;python ...
1
vote
3answers
838 views

piping pwd to an executable as an argument

So I have an alias for "sublime text" http://www.sublimetext.com/docs/2/osx_command_line.html and very often I need to open a file or a folder right from the terminal, easy for a file: subl ...