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

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5
votes
1answer
1k views

Redirect terminal output to image file

I need to programmatically run some unix commands and get the output in a image file, the format could be png or jpeg (jpg). The commands are run in an AIX (IBM *nix) machine. I don't have ...
1
vote
1answer
275 views

How to configure a shortcut to open a window accessed by right click on the systray icon?

The application I am referring to is Turpial and it is a Twitter client. The problem is to open the window I need to send twits, I have to right click on a systray icon and select an option. In the ...
7
votes
5answers
2k views

resolve all ip addresses in command output using standard command line tools

I have several log files that contain a bunch of ip addresses. I would love to be able to pipe the data through a program that would match and resolve ip addresses. I.E. cat /var/log/somelogfile | ...
1
vote
2answers
477 views

Command-line web browser with Kerberos authentication?

QUESTION: Is there a Kerberos-friendly web browser usable via an SSH console? I have tried links but it does not seem to work with Kerberos (the webapp asks me for login/password even though I have a ...
3
votes
4answers
296 views

Change working directory of 2 terminals at once

I've typically have gnome-terminal open with ~8 tabs, using 2 consecutive tabs for the same task (one has emacs, the other is used to do git checkins and unittest runs and so). When changing tasks, I ...
7
votes
2answers
803 views

Shell Script for going through a dir recursively and chmodding based on conditions of file type

Can anyone point me to either code or a tutorial for writing a shell script that can recursively go through an entire directory structure (starting at the current working directory, or given an ...
1
vote
2answers
871 views

Search and delete .Trash

I have 4 large USB devices with lots of backups collected over the years. I want to search for all .Trash folders and delete the contents on Fedora 17. I tried the following which failed:- # ...
172
votes
16answers
140k views

How to do integer & float calculations, in bash or other languages/frameworks?

Using echo "20+5" literally produces the text "20+5". What command can I use to get the numeric sum, 25 in this case? Also, what's the easiest way to do it just using bash for floating point? For ...
2
votes
1answer
606 views

Creating a list of unique senders from Thunderbird mail files through the command-line

I've got some large mailboxes and using Thunderbird, that means that I have several mbox files. These single files contain all e-mails in a particular folder. Now, I would like to get some data on the ...
7
votes
2answers
24k views

executing if-statement from command prompt

In bash I can do the following: if [ -f /tmp/test.txt ]; then echo "true"; fi However, if I add sudo in front, it doesn't work anymore: sudo if [ -f /tmp/test.txt ]; then echo "true"; fi -bash: ...
20
votes
3answers
7k 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 ...
1
vote
1answer
138 views

attr man page missing?

How does one search for certain manpages (such as http://linux.die.net/man/5/attr)? Trying: man attr and man -K attr don't seem to work. Any ideas why?
0
votes
1answer
850 views

OSX : rmdir “permission denied” but directory removed

This is a question from a newbie trying to learn UNIX commands. I was trying to test the rmdir command by removing a test directory located in my Downloads directory. I have read and write rights on ...
2
votes
2answers
357 views

CentOS 5.6 live time feature without repeatedly executing date command

I am using CentOS 5.6, is there a way to view a "live" time, without constantly executing the date command? Constantly excuting the date command can be quite frustrating and repetitive when checking ...
9
votes
2answers
5k views

What is “Print to File” and can it be used from command line?

When you select "Print to File" in a Gnome print dialog (not cups-pdf): ... what is the actual command that gets executed? (I'm interested in the postscript variant, as on the image) On the other ...
2
votes
2answers
1k views

what does Curl's stand-alone hyphen (-) mean?

what's the stand-alone hyphen (between the -C & -O) stand for in this command? curl -C - -O http://www.intersil.com/content/dam/Intersil/documents/fn67/fn6742.pdf FWIW- I'm following a ...
5
votes
1answer
3k views

Command line utility to read vCalendar files

I use alpine to read mails, and occasionally get emails from people with vCalendar files in attachment. Is there a command line utility that reads and displays vCalendar files?
4
votes
2answers
1k views

Running two animations side-by-side using ImageMagick

I have two animations (.gif files) I want to run side-by-side. Can this be done with ImageMagick? Moreover, I want to start one of the gifs after thirty frames of the other have passed. Can this be ...
4
votes
1answer
4k views

Move position of an application window from the command line on OSX

An application — iA Writer — somehow got stuck off screen with only the corner showing. I can't grab it or use other means to move it from that position. All new windows open in that position, ...
2
votes
1answer
338 views

Replace “<?php print t('Blabla'); ?>” to be “Blabla”

Lets say in file.php, there is lots of php print text: <?php print t('Blabla'); ?>, <?php print t('Text Here'); ?>, etc. What I need is to remove <?php print t(' and '); ?> of the ...
6
votes
2answers
26k views

How to fix non-responsive Ubuntu system?

I use Ubuntu. Sometimes, the system does not have any response with mouse and keyboard. Is there any way to solve this problem except hitting the reset button on the machine?
11
votes
1answer
5k views

Best way to continue stopped move (mv) by merging directories?

I have moved (mv) a pretty large directory on my NAS (Linux based), but had to interrupt the procedure. Not being a regular Linux user, I though I could just continue and merge the rest later in. mv /...
3
votes
5answers
5k views

Execute on the basename of a find command

Suppose I have a directory structure as follows test test/a test/b Now I want to execute a command, such that in the . folder I can execute a command on the basename of the files a and b. So ...
5
votes
2answers
15k views

Difference between ifconfig and ipconfig? [closed]

What is the difference between ifconfig and ipconfig? What do dhcpcd and ifconfig actually do?
2
votes
1answer
665 views

Setting up clearcase view through nautilus file manager

On my workplace, in order to access certain folder on the server, say /x/y, I need to set up a clearcase view using the cleartool command. (I don't have much idea about clearcase or cleartool). Only ...
0
votes
1answer
635 views

Redirecting output of program reading from stdin

When I want to redirect an output of a.out program I will use ./a.out > output.txt This doesn't work when the program reads something from stdin. How would you redirect output in this case? I ...
11
votes
4answers
482 views

In bash, what are potential negative consequences of pausing a process with control-z?

Using bash, one can pause a process with control-z. However, are there any general circumstances or guidelines to beware of where a process would not behave well with being paused? My specific ...
3
votes
2answers
2k views

Chkconfig on Linux Mint 12 giving tons of errors

I'm trying to disable some services from starting at boot time on my Linux Mint 12 laptop. So I installed chkconfig, which has worked great for me before on Fedora. However, on Linux Mint 12, it gives ...
12
votes
4answers
16k views

'mv' equivalent of drag and drop with replace?

In a GUI environment, a drag-and-drop with replace will replace files and entire directories (including contents) with whatever is being copied in. Is there a way to accomplish this same intuitive ...
9
votes
2answers
8k views

command line tool to remove selected tags from mp3 files

Using MP3 Diags to clean up my mp3 collection, I've discovered that in addition to the ID3v2 tag, some files also have a Lyrics3, ID3v1, and some an APE tag. Are there command line tools out there to ...
11
votes
4answers
5k views

Command-line password manager that uses SSH key to authenticate

I'm looking for a command-line password manager, much like pwsafe, but one that features SSH key authentication. That is, I'd like to be able to add my SSH key to the authentication when opening the ...
1
vote
1answer
5k views

Is there a command line utility that copy files with progress information? [duplicate]

Possible Duplicate: move files with progress bar cp gets the job done but it would be nice if it had a little more feedback. Are there any utilities out there that do this? Personally, my ...
0
votes
1answer
416 views

Run a script after some command were executed

I have a list of scripts ./myscript <param> | grep "asd" ./myotherscript <param> <param> > file ... How can I automaticaly run another script when one of these command in the ...
7
votes
2answers
4k views

Is there any command-line, generic HTTP proxy (like Squid)?

I can easily use Netcat (or, Socat) to capture traffic between my browser and a specific host:port. But for Linux, does there exist any command-line counterpart of a Squid-like HTTP proxy that I can ...
1
vote
1answer
2k views

How to open a local URL (webpage) on the command line

On MacOS X I can run open /some/path/index.html and this would open the page index.html with the default software that handles .html files. Is there something similar on Ubuntu Linux? I have used ...
2
votes
2answers
889 views

How to change a firefox option on a quick way (via shortcuts, command line,..)?

In Firefox we have two options at Firefox->Preferences->Preferences->Fonts and colors->Colors menu, Use system colors and Sites can use other colors. I would like keep the first one ...
2
votes
1answer
189 views

Illustrate the difference of two squares via the command line

So, after 10 years of wanting to study the book that Ramanujan relied upon for a lot of his early strides in mathematics, it's 2012, and the book is finally online. To celebrate, I want to go through ...
5
votes
2answers
3k views

Passing a bash command-line argument containing a dot

How can a command-line argument containing a dot (.) be passed? Are there any escape sequences for capturing characters like dot? The following invocation of a bash-script from the shell does not ...
9
votes
2answers
3k views

Aliases and tmux

Aliases defined in .bash_aliases and .bashrc don't work in tmux. Can this be changed in some configuration, so the aliases work under tmux?
3
votes
1answer
1k views

Searching a file & excluding lines with a specified string

I have a large log file that contains numerous lines of the same entry, lets call it "repeat-info". As an example here is what a portion of the log might look like: [Timestamp] repeat-info [Timestamp]...
15
votes
4answers
3k views

Best method to collect a random sample from a collection of files

Suppose there is a directory holding 300 data files. I want to randomly select 200 of those files and move them into another directory. Is there a way to do that under Unix/Linux?
5
votes
4answers
718 views

Does bash have a built in caching command available (sort of like mktemp or sponge)?

I'm using the amazon ec2 command line tools, and the ec2-describe-instances tool is a little painful because of the 2-5 seconds it requires to make the request and display the output. I'm looking ...
3
votes
2answers
9k views

Batch copying/moving files in unix?

Is there a way to batch copy/move files in unix? I thought it might be an option for cp/mv but I can't find any way to do it.
4
votes
3answers
4k views

Removing apostrophe from all file names

I tried to remove apostrophe from all files' names in the directory. for i in *; do mv $i `echo $i | tr -d "'"`; done After executing this command nothing is renamed. Do you know what's wrong here?...
3
votes
3answers
656 views

Regarding separate a single file into multiple files according to line separation

Currently, I have a plain text file, A, such as lowest priority very high significance. outstanding very novel In this file, every line contains a sentence. I want to separate this file into ...
1
vote
1answer
1k views

How to change the default line length for od and hexdump

Is there any way to change the default line length for the od and hexdump commands? Can't see anything apropriate in the man pages.
4
votes
1answer
11k views

How to get exact file size and file name?

Right now I am using ls -lt /my/directory (see below) then php parses the output. But inconsistently because the delimiter is space and there might be two or more spaces in between two fields. The ...
14
votes
2answers
1k views

What is a simple way to schedule a single event to happen at some time in the future?

There are often times that I want my computer to do a single task, but not right now. For example, I could have it notify me in 30 minutes that it is time to leave work. Or maybe I want it to run a ...
12
votes
3answers
1k 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 ...
2
votes
1answer
2k views

How to format a curl command for a special task?

There is a search page in a form http://site.com/search.php and it sends a search query via POST request. I want to fetch this request via curl command line tool to inspect a POST request. The HTML ...