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"Need to monitor Linux server performance? Try these built-in commands and a few add-on tools. Most Linux distributions are equipped with tons of monitoring. These tools provide metrics which can be used to get information about system activities. You can use these tools to find the possible causes of a performance problem. The commands discussed below are some of the most basic commands when it comes to system analysis and debugging server issues such as: Finding out bottlenecks. Disk (storage) bottlenecks. CPU and memory bottlenecks. Network bottlenecks."

* Create new PDF or edit existing ones. * Add and/or edit bookmarks in PDF files. * Fast and simple PDF forms fill out. * Changing font attributes (size, family, color etc). * Encrypt and/or protect PDF files using 128 bit encryption. * Convert XPS files into PDF. * JavaScript support. * Dynamic XFA form support. * Validation Forms and Calculate Values. * Add PDF controls (like buttons, checkboxes, lists, etc.) into your PDFs. * Import/export PDF pages into common graphical formats including BMP, JPG, PNG, and TIFF. * Signing PDF documents with digital signature, signatures creation and validation. * Free PDF Editor on Linux ( for non-commercial use)

"eXeLearning is an easy to use authoring tool under GPL-2+ to create educational web contents. Installing eXeLearning on Ubuntu: sudo snap install exelearning eXeLearning generates interactive contents in HTML5 and other formats and it allows you to create websites including text, images, interactive activities, image galleries, evaluating rubrics, multimedia clips, games... All the educational materials can be exported in different formats: SCORM, IMS, ePub, responsive HTML website, XLIFF... eXeLearning is available for GNU/Linux, Microsoft Windows and Mac OS X. Go to https://exelearning.net/ for more download options."

"Recording Computer Playback on Linux"

"A tal fin, se escribieron dos scripts, el primero de ellos, que dado un directorio crea un archivo tar comprimido del mismo. Y el segundo, el que se ejecuta diariamente, que se encarga de verificar la fecha de modificación del último backup full del directorio y a partir de la misma crea un tar comprimido con los cambios desde entonces."

Just to get started...

"Booteando Arch en 8 segundos Después de mucho pelear, pude acelerar lo bastante el boot de arch como para quedar muy satisfecho con el resultado final. Se que hay herramientas que optimizan el arranque automáticamente pero me gusta hacer las cosas a mano. Además, aprendí muchisimo en el camino"

"Noteshrink es una aplicación de código abierto, escrita en python por Matt Zucker y que permite convertir notas escritas a mano a mejor calidad y en pdf, además está herramienta nos permite limpiar documentos escaneados de manera fácil y rápida."

"Many AUR packages contain lines to enable validating downloaded packages though the use of a PGP key. This establishes a level of trust between the software author and anyone who downloads the software - if you trust the key, and the download validates against the key, then you can trust the download."