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

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83 views

Best way to find the active wireless device

Of course I know the command: iwconfig which lists devices (and gives info about whether they have a wireless connection). For the purposes of a shell script, I'm really wondering, is there any way ...
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1answer
300 views

Pass a list of directories to a find command

How can I pass a list of directories to a find command? Imagine you got the list as: ls -d mydir*/ which would output mydir1, mydir2 and so on, but exclude otherdirs1, otherdirs2. I'd like to run ...
3
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3answers
820 views

Merging two directory without copying the files

Let's say I have as follows : Folder A C1 file a A2 Folder B C1 B2 file b B3 What I want is to merge these two folders, which would give me : Folder C ...
3
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2answers
1k views

How to get volume level from the command line?

I have a text status bar on a tiling window manager and I am using tcl to feed information to it. At the moment I need a command line that output the volume level 0% to 100%. I am using Arch Linux.
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4answers
597 views

Bash aliases/functions and command line options

I want to set an alias to start nedit together with command line option -noautosave (due to text files up to 500MB). What seemed to be easy: alias nn="nedit -noautosave $1 &" just raises some ...
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1answer
957 views

Get all images from website

I'm trying to wget all the images pictures from a website. I thought I knew how to use it, but I guess I don't. The images I'm trying to get come from here. The command I'm using is: wget -prA.png ...
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3answers
449 views

How can I restore an xkilled panel in Linux Mint without a reboot?

In Terminal, one can enter 'xkill' as a command which lets you select a window whose client you wish to kill. In fact, it can even be used to kill panels. How can I restore an xkilled panel in Linux ...
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1answer
3k views

What does “Invalid argument” mean in Solaris?

-bash-3.00$ ./p4 -V -bash: ./p4: Invalid argument What does "Invalid argument" mean in Unix? More details: p4 is an executable in the current directory. p4 actually refers to perforce. The option ...
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2answers
186 views

How to do multiple brace expansions without combinatorial explosion?

I often use brace expansion on the command line, because it's handy. Example {foo,bar} expands to: foo bar Multiple brace expansion also expand, e.g.: {foo,bar}Q{foo,bar} would expand to: ...
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3answers
458 views

Which cmd is the best for determining the OS' word size (32/64)-bit? [duplicate]

I need to find my OS (not hardware) is 32-bit / 64-bit. Which command is best? uname -p uname -i uname -m arch All the above commands returns the same answer: On 32 bit systems: i686/i386 On ...
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4answers
511 views

Why is the bash_history always coming up the same and not updating using non-login shells?

The last few days I've noticed that whenever I shutdown my system (Debian Testing) and fire up a bash session, then press the up arrow key, I get the commands from the first time I cleared the history ...
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2answers
310 views

Quickest way to find and replace a string in numerous HTML files

I have numerous HTML files all nested inside different folders contained in a single overall folder. In each of these HTML files I need to replace /contact/index.html With /contact/index.php ...
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2answers
231 views

Emacs shell mode makes $PS1 different

I have a custom $PS1 variable that looks like this on my command line: And on emacs using M-x shell unfortunately looks like this: Here is my $PS1 variable export PS1='\[\e]0;\u@\h: ...
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2answers
399 views

Using calibre from the command line

Using calibre from the command line, in debian testing, how can I insert a tag with the syntax being ebook-meta ebook_file --tags rhubarb but for a range of files, but all by the same author ...
2
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1answer
293 views

How to keep the terminal cursor fixed at the top?

When writing in command line I have this aversion to scrolling my eyes down to the bottom of the page as I write commands. How do I keep the cursor/line at the top and allow the output to be ...
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3answers
4k views

Remove ^M character from log files

Remove ^M character from log files. In my script I redirect output of my program to a log file. The output of my log file contains some ^M (newline) characters. I need to remove them while running ...
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1answer
561 views
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1answer
60 views

e- and f- versions of commands

I noticed that some commands also come in with e- and f- versions, e.g. grep, egrep, fgrep and a few others. Is there some pattern or a naming convention if a particular command should have e- or ...
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2answers
330 views

Mac OS X command-line tools - differences from FreeBSD

As I understand it many Mac OS X command-line tools (like ls, cp, chmod, chown etc.) are imported from FreeBSD. Which version of FreeBSD contains the command-line tools most compatible with the OS X ...
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4answers
4k views

Converting colored output into html

There are tools providing coloured output: dwdiff -c File1 File2 # word level diff grep --color=always # we all know this guy ... The question is: How to convert their colored output of arbitrary ...
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2answers
160 views

Looking for a GUI application to enter linux commands

I am looking for a GUI console where I can enter Linux commands in an entry widget and the result will be output in a text area widget. Is there is such software available? Something like this: In ...
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2answers
4k views

tar: short read

I get an error when I uncompress my tar. I do this: tar xvf VM_DECOMPTES.tar and after some time I get the following error: tar: short read What is going wrong here? tar: unrecognized ...
3
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1answer
5k views

Command to transpose (swap rows and columns of) a text file [duplicate]

Is there currently a generic command that will "pivot" input. e.g. #labeled.file name: bob title: code monkey name: joe title: pointy haired is converted to: name title bob code monkey joe ...
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4answers
55 views

Exracting fields in file and storing it in different file in vim

I have file int the following format: . . . Name:abc Occupation:def . . Name:xyz Occupation:ghi . . I want to extract the name and occupation field and save it in another file out.txt ...
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6answers
144 views

How to rename directory from all user accounts

Let say that more users have a tmp directory in their home directory. I want to rename each tmp directory in each user home directory. What is the easiest way? Something like this: sudo mv ...
2
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1answer
114 views

cp : short way of copying [closed]

I don't remember exactly but there was either cp or mv command which I was able to do something like this with: cp file{.cpp, .cpp.org} Which would copy file.cpp and make a copy named file.cpp.org. ...
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9answers
5k views

linux diff tools: create list of modified files

How do I create a list of modified files programmatically using linux command line tools? I'm not interested in the difference in any particular file (delta, patch). I just want to have a list of new ...
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1answer
163 views

How do I time how long my pg_restore takes in the command line?

I'm trying to track the amount of time the process takes for when I move around my data and upgrade my web app. From the command line, how would I track the amount of time elapsed from when the ...
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4answers
1k views

Why cat, grep and other commands can't understand files starting with minus sign? [duplicate]

If I have a file which name starting with single or several minus sign, for example --1 it can't be used as a parameter of many commands. Even if I run cat --1 instead of file content I get ...
3
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1answer
2k views

Start 4 programs on startup in Linux Mint via terminal

I'm working on a project and I hope you can help me solve a problem. I have four programs that are written in C. They have been compiled using gcc and they work as they should. Because the four ...
6
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1answer
827 views

Find links and their positions in a PDF

I need to find all links in a PDF file, along with the page they're on and their X/Y position. Is there any tool or combination of tools I can use to do that?
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3answers
4k views

Command for forcing a pointer ungrab (captured mouse release)

Sometimes Firefox doesn't release the mouse after dragging, so I need to kill the application to force it to release its pointer grab. Is there any command to force an application to ungrab the ...
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0answers
149 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 ...
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2answers
224 views

shell saves ip address that you ping? [duplicate]

I was once shown a shortcut that I can't recall/ find. After pinging an ip, then attempting to ssh into it - the ip was saved into to a variable automagically. Something like: ping 10.1.23.4 ...
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3answers
2k views

How to lock on Solaris 10?

On Linux I use flock lock command to execute a command with an exclusive lock. What is the standard operating system command of Solaris 10 to do the same in a shell?
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2answers
215 views

The difference that quotation marks make in find command [duplicate]

When I have a nested directory find . -name "*.py" -print command gives me all the python scripts beneath current directory. However, find . -name *.py -print returns only the python scrips in current ...
3
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1answer
1k views

Mutt imap multiple account

My first question on this site, I come quickly. I'm a fan of command line tools and text-based application. I use tmux with a minimalist tiling wm is qtile, I can not change the environment. I'm a ...
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3answers
976 views

How can I start a process using cpulimit?

I am trying to use cpulimit for testing an app I'm developing under low resource conditions, and I need the process to start under the influence of cpulimit. It is not sufficient to start the program ...
3
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2answers
98 views

How to switch to editing command in text editor [duplicate]

When typing a complicated command that started on the command line in Bash, how do I switch to editing it with ViM?
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1answer
212 views

How can I blank the desktop via the command line?

How can I programmatically make my desktop blank (i.e. remove the icons and make it black) from the command line? I'd also like to be able to restore it afterwards. Multiple solutions are OK, Ubuntu, ...
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1answer
387 views

How can I move between words in the command prompt in tcsh in linux?

I want a feature like vim's going forward or backwards command (w,e,ge,b) etc in the shell prompt. I am using tcsh shell in Linux. I would like to go 'n' number of words backs or forward etc and do ...
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0answers
173 views

Can't unlock a file for path change

I'm trying to order the path entries on my mac, but it seems that my /etc/paths file is Locked. I tried the instructions on this link, but I can't save the file as it is locked. I even tried chflags ...
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2answers
2k views

What is meant by a shell is in “vi” mode or “emacs” mode?

This question follows directly from the answer to one of my previous questions here. I am newbie to unix world and this site has helped a lot to understand some core concepts. In this case I am ...
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2answers
122 views

Can I run a command after the user uses Ctrl-C to kill a command?

So at my position we use a shared set of aliases to do builds. Something like... alias 'build'='cd $BUILD_ROOT; m; cp ...; cp...; deploy; deploy; deploy; cd -' This is super irritating because the ...
5
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2answers
797 views

Is there a way to simulate a “Close” event on various windows using the terminal?

I answered on Ask Ubuntu Quit all instances of gnome-terminal via a command but as you all can read gnome-terminal didn't seems to have a SIGcall I could use to simulate this "Close" event. So this ...
1
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1answer
181 views

How can I clear portion of what is typed into the prompt while working on Linux and using C-shell?

I am working in Linux and C-shell. Often times I would require to change some portion of what is there already in the prompt that I obtain from reverse searching through the history command by use of ...
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3answers
1k views

How to find first match in multiple files

Is there a way for the find command to search for the first match or occurrence of a string or pattern within each of multiple files? I've been using the usual syntax: find dir -iname '*.ext' -exec ...
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2answers
94 views

How can I execute a shell script that exists in a longish path with a single command without first cd'ing to the directory?

In Linux I always cd to a longish path and then run the script: cd /scratch/someDir/someOthernestedDir/ ./shellscriptName.sh How can I avoid achieve typing this longish path and then executing ...
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2answers
50 views

Can I see in history output from which directory I had actually issued a command?

CTRL+R allows me to reverse search through the command history which is great but can I also find out from which directory that command was run? I am using C-shell in Linux.
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2answers
2k views

How to specify attachment encoding in mutt command line?

I'm trying to send an email with attachment from a perl script. First, I create the attachment (an xml file): open(XMLFILE, ">:utf8", $xmlfile); print XMLFILE "<?xml version=\"1.0\" ...