DᴀʀᴛʜVᴀᴅᴇʀ's questions

It's been awhile since I've played with Imagemagick. I do remember crop and I can take an image named foo.png and use:

convert foo.png -gravity north -crop 1000x100 bar.png

but my output is:

bar-0.png
bar-1.png
bar-2.png
bar-3.png
...

When I only want what's in bar-0.png.

I've researched around and found:

• Cropping Images using Command Line Tools Only
• Cropping images with ImageMagic produces wrong size images - why?
• How can I trim just the left and right side of an image using Imagemagick in PHP?
• Cutting and Bordering

What is the correct way to crop an image and just get the first return? I'm not not worried about the aspect ratio or the size of the images. I'm just trying to get a sample of the image's first 100px.

I've used touch for single creation of blank files and multiple blank files from a list using cat foo.txt | xargs touch plus I ran across How to create multiple files with the Terminal? but I'm having issues figuring out how I can implement the creation of files that use a template from a list of files with pure bash.

File names in foo.txt file:

cpt-one.php
cpt-two.php
cpt-three.php

template.txt:

// lots of code

Is there a way I can use touch to create the file's from the list using what's in template.txt instead of creating a blank file?

Searched for a solution on SO, Ask and Unix/Linux but I am lost trying to figure out how to write a conditional with a grep range:

Go through:

1-20_something
100-200_something
2-100_something
11-333_something

code works but only on 1-9_something:

if grep -q '[0-9]-[0-9]_something' "$foobar"; then
    echo "Additional Code"
fi

doesn't work:

if grep -q '\d{1,3}-\d{1,3}_something' "$foobar"; then
    echo "Additional Code"
fi

and this doesn't work:

if grep -q '[0-9]{1,3}-[0-9]{1,3}_something' "$foobar"; then
    echo "Additional Code"
fi

What is the best way to range through {1,3}?

EDIT:

To help the next person that may run across this I did a lot of searching and after the answers given I was able to result:

• Grep for range of numbers
• How to match a specific number range with a regex using grep only
• Matching a number sequence in grep

I have been trying to find a way to spellcheck my HTML file's content in Sublime for quality control. I have referenced several articles referring to aspell but after installation and trying to run through HTML files I am having to strip out all tags and its complicated trying to go through all HTML files on a package/project level. Is there a spellcheck tool that I can script with in the terminal that will ignore the tags and check the content? Any other ideas for better implementation I am for it

I have a server backup of a WordPress site that has about 1000 images in the uploads directory. When an image was uploaded through WordPress it would create multiple sizes of the image such as:

foobar.jpg
foobar-170x170.jpg
foobar-250x250.jpg

I'm familiar with using find to move all files from a directory and its subfolders with something like find . -mindepth 3 -type f -print -exec mv {jpe?g|png|gif} . \; but I was curious to know if an exclusion along the lines of "don't move this" can be added. I'd like to give a pattern and then exclude filenames containing that pattern. Something like !(\d{2,5}x\d{2,5}\.(jpe?g|png|gif)).

Ideally, I would like to do this in a single command without running it in a loop or using rm to delete the files after I've moved them all. Any better suggestions to reduce multiple terminal commands would be great.

I was curious to know if there is a better way to sed two words and add a line before and after them.

I learned how from grymoire but I wanted to know if there was a better way to do:

#!/bin/sh
sed '
/foo/,/bar/ {
i\
Add this line before
a\
Add this line after
}'

What I am trying to do is find two words on one line, in this case foo and bar and then add something on the line before and the line after.

If its not to much trouble or off-topic, can some recommend in the comments a few other sites to read on sed other than grymoire?

I want to learn more so I have tried to script more than just using the terminal. I know rename and I can rename image files with rename 's/ /_/g' *.jpg but when I write it in a shell script to point at a directory:

DIRECTORY="/foo/bar"

for imgfile in $(find $DIRECTORY -type f -name \*.jpg); do
    echo 'replacing whitespace in' $(basename $imgfile)
    rename -f 's/ /_/g' *.jpg 
done

it doesn't work and the terminal will take a file (example: 1234 abcd.jpg) and echo abcd.jpg. So where am I going wrong?

While learning how to write scripts and work solely through the terminal I am experiencing an issue in regards to overwriting a .jpg with the message:

mv: try to overwrite foo.jpg, overriding mode 0555 (r-xr-xr-r)?

I was curious to know:

1. What causes this error message?
2. Why is this message not displayed for every image but some images?
3. How can I correct this?

EDIT: Would also like to know what r-xr-xr-r mean and how I can use them.

I am new to using sed but I have been experimenting sed's s/..../..../ (substitute) to modify a full sentence if it's on one line but I am unaware an alternative solution on how to modify a sentence that may have been separated on two lines such as:

This:

Lorem Ipsum is simply dummy text of the printing and typesetting industry.

is actually written as this:

Lorem Ipsum is simply dummy text of the 
printing and typesetting industry.

How can you detect for this or code it to replace the entire sentence even if it's on two lines instead of one?

I wanted to know what is the best way to remove any files no matter what their extension is based on a partial name.

Example:

13-05-12_foo_something.jpg
13-06-01_something.png
13-05-05_foo_site.html

rm everything in a directory and within the sub folders with _foo_ in the name.

So over the weekend I arrive to work, boot my PC and run the virtualbox session of Ubuntu but now I get the message:

The folder contents could not be displayed You do not have the permissions necessary to view the contents of "sf_virtual"

I don't understand what could have happened? I did install an update and read an article to re-install Guest Additions and it still doesn't allow access in /media. When I do gksudo nautilus and then sudo ls -al /media/sf_virtual it will display all the files in virtual as -rwxrwx--- 1 root vboxsf numbers month date time filename. When I am under name in the terminal ls /media/sf_virtual it returns Permission denied. Any ideas on how to get access back? I have removed the shared folders and added new ones but it still doesn't work.

I was curious to know how this happened and how to correct it?

    Setting up gstreamer0.10-plugins-good (0.10.31-1ubuntu1.2) ...
dpkg: error processing gstreamer0.10-plugins-good (--configure):
 subprocess installed post-installation script was killed by signal (Segmentation fault), core dumped
Setting up libgl1-mesa-glx-lts-quantal (9.0.3-0ubuntu0.4~precise1) ...
/sbin/ldconfig.real: /usr/lib/x86_64-linux-gnu/libXv.so.1 is not an ELF file - it has the wrong magic bytes at the start.

Aborted (core dumped)
dpkg: error processing libgl1-mesa-glx-lts-quantal (--configure):
 subprocess installed post-installation script returned error exit status 134
dpkg: dependency problems prevent configuration of libqt4-opengl:
 libqt4-opengl depends on libgl1-mesa-glx | libgl1; however:
  Package libgl1-mesa-glx is not installed.
  Package libgl1-mesa-glx-lts-quantal which provides libgl1-mesa-glx is not configured yet.
  Package libgl1 is not installed.
  Package libgl1-mesa-glx-lts-quantal which provides libgl1 is not configured yet.
dpkg: error processing libqt4-opengl (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libglu1-mesa:
 libglu1-mesa depends on libgl1-mesa-glx | libgl1; however:
  Package libgl1-mesa-glx is not installed.
  Package libgl1-mesa-glx-lts-quantal which provides libgl1-mesa-glx is not configured yet.
  Package libgl1 is not installed.
  Package libgl1-mesa-glx-lts-quantal which provides libgl1 is not configured yet.
dpkg: erNo apport report written because the error message indicates its a followup error from a previous failure.

Everything I have installed through the terminal I get this at the end: E: Sub-process /usr/bin/dpkg returned an error code (1)

I imagine this is where I am getting an error everytime I try to install something with sudo apt-get whatever. My setup is Windows 7, Virtualbox, Ubuntu 12.04 x64. I did install Guest Additions but I cant seem to figure out how to update this. I do have root access. I would like to learn why this wasn't installed, if it was a bad download copy and if I should delete the virtual session, download a new copy and start over again. Any input on how I can learn how to correct this would be great or what could have caused this.

Installing a new VPN on a new workstation and it has been a year since I did my last Virtualbox setup. Everything works but I don't like how the shared folders in media are labeled as sf_folder. I was curious to know can I rename these folders or would it cause issues? I didn't see a solution or any documentation on it from a search. Setup is now Windows 7 and Ubuntu 12.04 running Virtualbox. This may be another question but after the initial install and setup of shared folders and Guest Additions I only see a folder in media and not mnt. I can get a shared folder in mnt with sudo ln -sf /media/folder /mnt/ but I don't know yet if there's a better way yet.

I am looking for a tool or a way to minify (similar to Compress my code and this question on Stack) all of the code in my .xml, .css, .html and .js files through Ubuntu's terminal. Eventually I will bash script the process, but at the moment I would like to just find something to test. Is there a tool out there that I can use to compress all these file formats through the terminal?

I am trying to use CPAN, but I am running into an issue. First I did sudo apt-get install perl. It says it's there. I typed cpan install automatically yes sudo which indicated as done, and I can get into cpan. I downloaded the .pl I wanted to use on CPAN, pointed to the directory, and tried perl file.pl. I am presented with this message:

Can't locate CAM/ODF.pm in @INC (@INC containes /etc/per/ /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14/ .usr/share/perl/5.14 /usr/local/lib/site_perl .) at file.pl in line 7

I downloaded CAM-PDF-1.59.tar.gz, double clicked, and tried placing the contents in /usr/local/lib/pkgconfig, but I am getting you don't have the right permissions.

How should I install CPAN on Ubuntu 12.10 (Quantal Quetzal) to use in the terminal? Where am I going wrong?

I am wanting to learn cron and I searched for some quality tutorials. I found How do I set up a cron job.

My goal is to have a folder on a network that will have sub-folders. Each sub-folder is a particular script that will be executed by the cron. I don't want to overload our system so how can I create the cron the run a shell script after the assigned time and previous script is ran?

Example:

Main Folder
    Sub1 - script1
    Sub2 - script2
    Sub3 - script3

Cron 10:01 - runs script1
Cron 10:02 - runs script2
Cron 10:03 - runs script3
Cron 10:04 - runs script1
Cron 10:05 - runs script2

I have typically used XAMPP on my windows PC for web development testing. This afternoon I plan to add LAMP to my Ubuntu. I would also like to try and install Apache Tomcat but I am not familiar if

1. Can this be done in Ubuntu 12.04?
2. Is there any solid documentation for testing and running?

I did not find anything from my searches here so if this has been asked please close. Also, if you can suggest a better tutorial for the LAMP install I would greatly appreciate it. This will be for local testing, too.

I am looking for a mail option on my Ubuntu server that I can code into my shell script to trigger a script completion by email. What is the best way to complete this task code wise and mailer wise? I had hoped Outlook would work but I see wine indicates it as bad. The email accounts will be work accounts. This will be my first time setting up email function in a Linux box. I have typically used Ubuntu as a mod server for files.

EDIT: Im looking to send FROM the server when the script is complete. If any better suggestions are available I am open to change.

Trying to learn how to run my scripts through Ubuntu's terminal regularly. That being said I am familiar with bash, wget, and awk being called but how do I call python files to run in the terminal? I would like to learn this but I am unsure on where to research it. I have a .pyw file that references several .py files in a folder.

Possible Duplicate:
How to install Visual Studio 2012?

I was told Visual studio would not work for Ubuntu. However, after searching to see if I can get notepad++ to work on a new install of Ubuntu 12.04 I found something called wine. After some more reading I am under the impression wine is a windows installer for Ubuntu? Can someone verify this? I am also to presume that I could install Visual Studio on Ubuntu via wine?

reference