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Command line reference

Command line reference

Basic Linux Command Step by Step Example | Linux Classes Learn Basic Linux Command with Step by Step Example Approach Linux Commands Linux: de Novato a Novato: Bourne Shell, tutorial en español Página siguientePágina anteriorÍndice general 9. Bourne Shell, tutorial en español 9.1 Creación de comandos y programas usando el shell Además de usar el shell para ejecutar comandos, puedes usar su lenguaje de programación para escribir tus propios comandos o programas. EL Bourne shell (sh) está disponible en todos los sistemas UNIX. 9.2 Creación y ejecución de shell scripts simples Para crear un shell script simple, debes poner líneas de comando en un fichero, ponle los permisos de acceso apropiados y después ejecuta el fichero. EJEMPLO : Este es el contenido de un shell script llamado display : cat display # Este script displaya la fecha, hora, nombre de # usuario y directorio actual echo "Fecha y hora:" date echo echo "Tu usuario es: `whoami` \\n" echo "Tu directorio actual es: \\c" pwd Las primeras dos líneas que comienzan con una almohadilla (#) son comentarios y no son interpretadas por el shell. Las backquotes (`) entre el comando whoami ilustran el uso de la sustitución de comandos.

About Genode — Genode Operating System Framework Genode is a novel operating-system architecture that enables dynamic workload while retaining security and robustness. The fundamental difference of Genode compared to other OS architectures is its strict organizational structure, which allows the execution of sensitive applications with a trusted computing base of a few thousand lines of code beside high-complexity workload. With its organizational approach, the architecture facilitates a clean separation of policies and mechanisms, and enables the definition and application of system policies in a natural and distributed fashion. Genode's resource-management concept enables highly dynamic workload but still retains deterministic behaviour normally only found in statically configured systems. Learn more about the concepts of Genode... The Genode OS framework is the reference implementation of this architecture. Genode is an offspring of the L4 community. Road map The direction where the project is currently heading Challenges Publications

How to Backup Linux? 15 rsync Command Examples rsync stands for remote sync. rsync is used to perform the backup operation in UNIX / Linux. rsync utility is used to synchronize the files and directories from one location to another in an effective way. Important features of rsync Speed: First time, rsync replicates the whole content between the source and destination directories. Syntax $ rsync options source destination Source and destination could be either local or remote. Example 1. To sync two directories in a local computer, use the following rsync -zvr command. $ rsync -zvr /var/opt/installation/inventory/ /root/temp building file list ... done sva.xml svB.xml . sent 26385 bytes received 1098 bytes 54966.00 bytes/sec total size is 44867 speedup is 1.63 $ In the above rsync example: -z is to enable compression -v verbose -r indicates recursive Now let us see the timestamp on one of the files that was copied from source to destination. Example 2. rsync option -a indicates archive mode. Example 3. Example 4. Example 5. Example 6.

BASH Programming - Introduction HOW-TO Next Previous Contents BASH Programming - Introduction HOW-TO by Mike G mikkey at Thu Jul 27 09:36:18 ART 2000 This article intends to help you to start programming basic-intermediate shell scripts. It does not intend to be an advanced document (see the title). 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 13.1 Ways Calling BASH 14. The Kernel Boot Process The previous post explained how computers boot up right up to the point where the boot loader, after stuffing the kernel image into memory, is about to jump into the kernel entry point. This last post about booting takes a look at the guts of the kernel to see how an operating system starts life. Since I have an empirical bent I’ll link heavily to the sources for Linux kernel at the Linux Cross Reference. The sources are very readable if you are familiar with C-like syntax; even if you miss some details you can get the gist of what’s happening. At this point in the Intel x86 boot story the processor is running in real-mode, is able to address 1 MB of memory, and RAM looks like this for a modern Linux system: RAM contents after boot loader is done The kernel image has been loaded to memory by the boot loader using the BIOS disk I/O services. The action starts in the real-mode kernel header pictured above. Architecture-specific Linux Kernel Initialization 104 Comments

Mommy, I found it! — 15 Practical Linux Find Command Examples Apart from the basic operation of looking for files under a directory structure, you can also perform several practical operations using find command that will make your command line journey easy. In this article, let us review 15 practical examples of Linux find command that will be very useful to both newbies and experts. First, create the following sample empty files under your home directory to try some of the find command examples mentioned below. # vim touch touch mycprogram.c touch MyCProgram.c touch Program.c mkdir backup cd backup touch touch mycprogram.c touch MyCProgram.c touch Program.c # chmod +x # ./ # ls -R .: backup MyCProgram.c mycprogram.c Program.c . 1. This is a basic usage of the find command. # find -name "MyCProgram.c" . 2. This is a basic usage of the find command. # find -iname "MyCProgram.c" . 3. # find / -name passwd . 4.

bash Bash (Bourne again shell) es un programa informático cuya función consiste en interpretar órdenes. Está basado en la shell de Unix y es compatible con POSIX. Fue escrito para el proyecto GNU y es el intérprete de comandos por defecto en la mayoría de las distribuciones de GNU con Linux. Hacia 1978 Bourne era el intérprete distribuido con la versión del sistema operativo Unix Versión 7. Sintaxis de Bash[editar] La sintaxis de órdenes de Bash es un superconjunto de instrucciones basadas en la sintaxis del intérprete Bourne. La mayoría de los shell scripts (guiones de intérprete de órdenes) Bourne pueden ejecutarse por Bash sin ningún cambio, con la excepción de aquellos guiones del intérprete de órdenes, o consola, Bourne que hacen referencia a variables especiales de Bourne o que utilizan una orden interna de Bourne. La sintaxis de Bash tiene muchas extensiones que no proporciona el intérprete Bourne. Acceso a los parámetros[editar] for param in "$@" do echo "$param" done Bashismo[editar]