I would like help with the following algorithm in bash (or anything accessible through bash shell): I give a number to some function, and based on that number I obtain a string of alphabet letters. Example: I do not wish to occupy more memory than I need, so approaches such as for i in {A..Z} or echo {A..Z} o…
Install Play! with activator on linux
I’m new with the framework Play! and Linux and I’m trying to install Play! scala. I’m following the official tutorial (official play! tutorial) But I have this problem : when I run this command : $ activator new my-first-app play-scala I have this warning : And when I run sudo apt-get instal…
convert images to pdfs in subdirectories
I have a bunch of sub-folders with images in them. I am trying to recursively convert them into pdf files using the directory names as the pdf name. With the help of some Google searches I tried using this script I wrote: It did not work. How can I get this to work? Each folder has several .JPGs in it
How to clean up masscan output (-oG)
I have a problem with the output produced by the masscan utility with the -oG options (“grep-able” output); for instance, it outputs this: The above is neither very readable nor easy to understand. How can I use Linux command-line utilities, e.g. sed, awk, or grep, to output something as follows, …
How can i drop packet in kernel after catched it by sock_raw in usermode?
I have use sock_raw get all ip packet from kernel. But packet still alive in kernel, how can i drop it? Answer You cannot. When you receive the packet on a raw socket, the kernel has created a copy and delivered it to your receiving process. The packet will continue being processed in the meantime according t…
Python3 error “no module named bluetooth” on Linux Mint
I am trying to connect my Lenovo S10E to a Nintendo Wiimote via bluetooth. I am using a simple Python script, reproduced below. I am calling it from the Linux Mint (version 16, “Petra”) command line using python3 find_wii.py Script: I am receiving the error I have installed bluez and python wrappi…
bundle install not running from my post-update hook
I’ve setup a post-update hook for my project. I have a bare repository (/var/git/myproject) which I push to, and a live repository (/var/www/myproject) where my app is running. I also included bundle install and bundle exec rake db:migrate to install gems and update db. Below is my post-update hook When…
Bash: Syntax Error Near Unexpected Token `(‘ When Using Wgrib2
Good Evening All, I’m currently having a bash syntax issue when I try to run the following command in my terminal, the bash: syntax error near unexpected token `(‘ error message pops up after I run the below code: I realize that not many people on here probably have experience using wgrib2 but, th…
scons still failed after setup env
I am using scons 1.2 on Centos 5, with devtoolset-1.1, devtoolset-1.1 root path locate at /opt/centoss/devtoolset-1.1/. I added devtoolset binary path to PATH variable, this is what I have everything look good, then I try to make a simple C program using scons I follow the guide at http://www.scons.org/doc/1.…
Why doesn’t PHP include work on my Raspberry Pi?
So I’m very new to Linux and I just bought a Raspberry Pi to serve as my webserver and I noticed the following lines, with the location var/www/mysite/index.php, doesn’t work properly: I don’t even get any errors or warnings, just a blank page showing “Hello1”, even though I have…