Adding files - arranging repo

README.org

@@ -1,24 +1,31 @@
 * Bash tutorial
 
-  Tutorial with some basic commands, tips and options to use bash
+Tutorial with some basic commands, tips and options to use bash.
+[[https://www.gnu.org/software/bash/][Bash]] (Bourne Again Shell) is a shell commonly used on GNU-Linux systems for
+multiple purposes. Knowing about bash is an enjoyable experience and a great
+opportunity to learn about computers, files, directories and programs.
 
  * [[./tutorial/add_user.org][How to add users]]
- * [[./tutorial/convertppt2pdf.org][Convert office files to pdf]]
+ * [[./tutorial/changeowner.org][Changing file permissions: 'chmod']]
+ * [[./tutorial/convertppt2pdf.org][How can I convert office files to pdf]]
+ * [[./tutorial/croc.org][Using 'croc' to tranfer files between machines]]
  * [[./tutorial/dd_command_flash_usb.org][Using dd command to flash usb]]
  * [[./tutorial/describe_hardware.org][Describing hardware]]
  * [[./tutorial/dictionaries_translat.org][Using dictionaries and translation tools]]
- * [[./tutorial/gawk.org][GNU awk program]]
+ * [[./tutorial/display_files.org][Display files: 'less', 'head' and 'tail' commands]]
+ * [[./tutorial/files_directories.org][Learning about files and directories]]
+ * [[./tutorial/gawk.org][GNU-awk program: a nice tool!]]
+ * [[./tutorial/listing_process.org][Listing process]]
  * [[./tutorial/manuals.org][Reading the fabulous manuals!]]
- * [[./tutorial/rmlint.org][Using 'rmlint' for cleaning your HD]]
+ * [[./tutorial/move_files.org][Move or rename files]]
+ * [[./tutorial/poppler.org][Convert markup text to multiple formats using 'pandoc']]
+ * [[./tutorial/poppler.org][Convert pdf to text or html using 'poppler']]
+ * [[./tutorial/redirect_output.org][What exactly are input, output and standard error?]]  
+ * [[./tutorial/rmlint.org][Using 'rmlint' to clean your hard disk]]
  * [[./tutorial/run_bash_script.org][How to run bash scripts]]
  * [[./tutorial/run_rscript.org][How to run R-scripts]]
- * [[./tutorial/streaming_terminal.org][Streaming from terminal!]]
- * [[./tutorial/variables.org][Knowing about variables]]
- * [[./tutorial/redirect_output.org][Input output and standard error]]
- * [[./tutorial/files_directories.org][Exploring about files and directories]]
- * [[./tutorial/sed_subsitute.org][Using 'sed' to subsitute text]]
- * [[./tutorial/croc.org][Using 'croc' to tranfer files between machines]]
- * [[./tutorial/move_files.org][Move or rename files]]
  * [[./tutorial/search_files.org][Searching files in the system]]
- * [[./tutorial/listing_process.org][Listing process]]
- * [[./tutorial/display_files.org][Display files: 'less', 'head' and 'tail' commands]]
+ * [[./tutorial/sed_subsitute.org][Using 'sed' editor to substitute text]]   
+ * [[./tutorial/streaming_terminal.org][A really nice feature: streaming from terminal!]]
+ * [[./tutorial/variables.org][Knowing about variables]]
+

doc/bash_tutorial.org

@@ -26,40 +26,6 @@ The file can be found in the user home:
 
 
 
-** Convert pdf to text or html using poppler
-
-Use poppler and redirect the text to a org file.
-~pdftotext~ converts a pdf to "txt" if no other format is
-specified
-
-: pdftotext foo.pdf foo
-
-: pacman -S poppler
-: pdftotext foo.pdf ->> foo.org # first option
-: pdftotext foo.pdf foo.org # second option
-
-Convert pdf to html
-
-: pfdftohtml foo.pdf foo.html
-
-** Convert files using pandoc
-
-Use pandoc with "-s" flag to produce a standalone document and "-o" to
-redirect output to a file.
-
-In the example a file "foo" is converted from ~odt~ to ~org~
-
-: pandoc -s -o foo.org foo.odt
-
-** Convert files to pdf using libreoffice
-
-Convert odt file "tcl_online3.odt" to pdf
-
-: libreoffice --headless --convert-to pdf tcl_online3.odt
-
-
-
-
 ** Backup a file
 
   Using "cp"

tutorial/.#bash_tutorial.org

@@ -1 +0,0 @@
-compartido@compartido.3161:1656845041

tutorial/add_user.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * Adding a new user
 
 Check users that are logged
@@ -9,7 +11,7 @@ users
 #+RESULTS:
 : myuser
 
-New user called "test"
+Creating a new user called "test"
 
 #+begin_example bash
 sudo useradd -p -m test

tutorial/bash_tutorial.org

@@ -1,206 +0,0 @@
-#+TITLE: bash commands
-#+DATE: 2021-08-30
-#+STARTUP: indent
-#+OPTIONS: num:nil
-
-* DONE work in bash tutorial
-  :LOGBOOK:
-  CLOCK: [2021-09-08 mié 18:52]--[2021-09-08 mié 19:22] =>  0:30
-  CLOCK: [2021-09-04 sáb 16:04]--[2021-09-04 sáb 16:34] =>  0:30
-  CLOCK: [2021-09-04 sáb 15:19]--[2021-09-04 sáb 15:49] =>  0:30
-  :END:
-
-
-
-* Execute stuffs
-
-
-* Show command history
-
-: history
-
-The file can be found in the user home:
-
-: /home/user/.bash_history
-
-
-
-
-** Convert pdf to text or html using poppler
-
-Use poppler and redirect the text to a org file.
-~pdftotext~ converts a pdf to "txt" if no other format is
-specified
-
-: pdftotext foo.pdf foo
-
-: pacman -S poppler
-: pdftotext foo.pdf ->> foo.org # first option
-: pdftotext foo.pdf foo.org # second option
-
-Convert pdf to html
-
-: pfdftohtml foo.pdf foo.html
-
-** Convert files using pandoc
-
-Use pandoc with "-s" flag to produce a standalone document and "-o" to
-redirect output to a file.
-
-In the example a file "foo" is converted from ~odt~ to ~org~
-
-: pandoc -s -o foo.org foo.odt
-
-** Convert files to pdf using libreoffice
-
-Convert odt file "tcl_online3.odt" to pdf
-
-: libreoffice --headless --convert-to pdf tcl_online3.odt
-
-
-
-** Display files
-
-Show content of a file. Concatenates and writes file.
-Using "tac" reverses the result of "cat" command
-
-: cat file.txt
-
-Using head, tail and less to show parts of files
-
-Showing the first two entries
-
-#+begin_src bash
- head -n 2 /etc/hosts
-#+end_src
-
-  #+RESULTS:
-  | 127.0.0.1 | localhost |
-  | 127.0.1.1 | myuser    |
-
-  Showing the last two entries
-
-  #+begin_src bash
- tail -n 2 /etc/hosts
-  #+end_src
-
-  #+RESULTS:
-  | ff02::1 | ip6-allnodes   |
-  | ff02::2 | ip6-allrouters |
-
-
-  #+begin_src bash
- less /etc/hosts
-  #+end_src
-
-  #+RESULTS:
-  | 127.0.0.1 | localhost      |               |              |
-  | 127.0.1.1 | myuser         |               |              |
-  | ::1       | localhost      | ip6-localhost | ip6-loopback |
-  | ff02::1   | ip6-allnodes   |               |              |
-  | ff02::2   | ip6-allrouters |               |              |
-
-
-Show content of a zip file using less and pipe "|"
-
-#+begin_src bash
-unzip -l tntvillage_484094.zip | less  
-#+end_src
-
-** Backup a file
-
-  Using "cp"
-
-  : cp bbdb{,.bak}
-
-  : bbdb.bak
-
-  Backups with tar (tape archiver)
-
-  Back up of "home"
-
-  * c = create file
-  * v = verbose
-  * f = write to a file/device
-  * z = compress the file (gzip) "tar.bz"
-  * j = compress the file (bzip2)
-
-  : tar -czvf /tmp/home.tar.gz /home
-
-** Simple code to encrypt
-
-   Encrypt:
-
-   : gpg -c X
-   : gpg X
-
-   Use the code to remove the original file:
-
-   : shred --remove X
-
-
-** Download files
-
-This code download the file and the argument ~-O~ is to rename the file
-
-#+begin_example
-wget https://filetodownload.org -O new_file
-#+end_example
-
-* Devices
-
-- mount /what /where
-  - what = device name
-  - where = directory
-    - /mnt = devices that mount occasionally
-    - /media = devices that mount frequently
-
-: run/$USER/media/$LABEL
-
-* List process
-
-Use ~ps~, ~top~ or ~htop~ to list process:
-
- * ~ps~ reports a snapshot of the current process
-
-: ps aux | less
-
- * ~top~ display dynamic real-time view of linux process
-
-: top
-
- * ~htop~ displays an interactive process viewer
-
-: htop
-
-To kill a process use:
-
-: kill [PID]
-
-or
-
-: pkill [PID]
-
-PID = process identificator
-
-* Evaluate time to load
-
-In emacs:
-
-: time emacs --eval '(save-buffers-kill-terminal)'
-
-* Cool commands
-
-: cal # calendar
-: clear # clear output
-: uname # display system information (-r, -p, -a)
-: wc # wordcount (file name)
-: date # check the date
-
-
-* References:
-
- * [[https://wiki-dev.bash-hackers.org/][The bash hackers wiki]]
- * [[https://link.springer.com/content/pdf/bfm%3A978-1-4302-6829-1%2F1.pdf?error=cookies_not_supported&code=2e41714e-ca8f-4796-a077-3243c836ec90][Beginning the linux command line]]
- * [[https://pandoc.org/][Pandoc manual]]
- * [[https://stackoverflow.com/][stackoverflow]]

tutorial/changeowner.org

@@ -0,0 +1,48 @@
+#+options: toc:nil num:nil author:nil
+
+* Changing permissions for files and directories
+
+There are three types of permissions for files and directories in the system:
+
+1. Read ('r')
+2. Write ('w')
+3. Execute ('x')
+
+The permissions can be differente for users: owner - group - others
+
+** Creating a file and checking permissions
+
+Here we create a file with the sentence "this is a fancy file". The sentence is
+redirected to the name "fancyfile.org" and a new file is created!
+
+#+begin_src bash
+echo "this is a fancy file" > fancyfile.org
+#+end_src
+
+#+RESULTS:
+
+In the ouptut of ~ls~ command, there letters showing each permission for each user: owner, group, others, respectively.
+
+#+begin_src bash
+  ls -la fancyfile.org
+#+end_src
+
+#+RESULTS:
+: -rw-r--r-- 1 compartido compartido 21 jul 18 06:06 fancyfile.org
+
+** Settings permissions for the file
+
+#+begin_src bash
+  chmod o=r,g=rw,o=r fancyfile.org
+#+end_src
+
+#+RESULTS:
+
+Then it changed!
+
+#+begin_src bash
+  ls -la fancyfile.org
+#+end_src
+
+#+RESULTS:
+: -rw-rw-r-- 1 compartido compartido 21 jul 18 06:06 fancyfile.org

tutorial/convertppt2pdf.org

@@ -1,16 +1,27 @@
+#+options: toc:nil num:nil author:nil
+
 * How to convert office documents to text
 
-You may use libreoffice from terminal to tranform the file in pdf:
+** From office document to pdf and then to plain text
+
+You may use libreoffice from terminal to transform the file in pdf:
 
 #+begin_example sh
   libreoffice --headless --convert-to pdf Presentation.pptx
 #+end_example
 
-
-Then you can use 'pdftotext' command to transform the pdf file to any plain text
-format:
+Then from a pdf you can use 'pdftotext' command to transform the pdf file to any
+plain text format:
 
 #+begin_example sh
   pdftotext Presentation.pdf Presentation.txt
 #+end_example
 
+
+** One more example: convert odf files to pdf using libreoffice
+
+Convert odt file "tcl_online3.odt" to pdf
+
+#+begin_src bash
+  libreoffice --headless --convert-to pdf tcl_online3.odt
+#+end_src 

tutorial/croc.org

@@ -1,3 +1,4 @@
+#+options: toc:nil num:nil author:nil
 
 * Send files to another machine with "croc"
 

tutorial/dd_command_flash_usb.org

@@ -1,3 +1,4 @@
+#+options: toc:nil num:nil author:nil
 
 ** Flashing USB with "dd"
 
@@ -20,4 +21,3 @@ An example with parabola:
 
 The ISO image is copied to "sdb1" (USB volume)
 
-More files with examples of use of "dd" [../bash/dd_command.org][here]] and [[~/Documentos/GNU/bash/dd_command_wiki.org][here]]

tutorial/describe_hardware.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * Describe hardware
 
 Here using piping to show only the first four lines in the output

tutorial/dictionaries_translat.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * Translators and dictionaries
 
 ** Apertium translator

tutorial/display_files.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * Display files
 
 Show content of a file. Concatenates and writes file.

tutorial/fancyfile.org

@@ -0,0 +1 @@
+this is a fancy file

tutorial/files_directories.org

@@ -1,3 +1,4 @@
+#+options: toc:nil num:nil author:nil
 
 * Files and directories
 

tutorial/gawk.org

@@ -1,10 +1,10 @@
 #+TITLE: Using gawk in command-line
 #+DATE: 2022-03-15
-#+OPTIONS: num:nil toc:nil
-#+AUTHOR: Jose
+#+OPTIONS: num:nil toc:nil author:nil
 #+PROPERTY: header-args:bash :exports both :session *bsh* :tangle yes
 #+PROPERTY: header-args:bash+ :cmdline :results output
 
+
 * gawk stands for GNU-awk
 
  ~awk~ is a data driven program that search text in files using a pattern. After finding the pattern

tutorial/listing_process.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * List process
 
 Use ~ps~, ~top~ or ~htop~ to list process:

tutorial/manuals.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * Manuals
 
 To explore the manuals use the command ~man~ or ~info~ followed by the name of the function or program

tutorial/move_files.org

@@ -1,4 +1,6 @@
-* Move or rename
+#+options: toc:nil num:nil author:nil
+
+* Move or rename files
 
 Use "~mv~  source destination" command
 

tutorial/pandoc.org

@@ -0,0 +1,18 @@
+#+options: toc:nil num:nil author:nil
+
+* Convert files using pandoc
+
+Use pandoc with "-s" flag to produce a standalone document and "-o" to redirect
+output to a file.
+
+In the example a file "foo" is converted from ~odt~ to ~org~
+
+#+begin_src bash
+  pandoc -s -o foo.org foo.odt
+#+end_src 
+
+Check the manual for more information:
+
+#+begin_example bash
+  man pandoc 
+#+end_src

tutorial/poppler.org

@@ -0,0 +1,28 @@
+#+options: toc:nil num:nil author:nil
+
+* Convert pdf to text or html using poppler
+
+Use poppler and redirect the text to a org file. ~pdftotext~ converts a pdf to
+"txt" if no other format is specified
+
+#+begin_src bash
+  pdftotext foo.pdf foo
+#+end_src
+
+Install poppler in Parabola GNU-Linux
+
+#+begin_src bash
+  pacman -S poppler
+#+end_src
+
+#+begin_src bash
+ pdftotext foo.pdf ->> foo.org # first option
+ pdftotext foo.pdf foo.org # second option
+#+end_src
+
+Convert pdf to html
+
+#+begin_src bash
+ pfdftohtml foo.pdf foo.html
+#+end_src
+

tutorial/redirect_output.org

@@ -1,3 +1,4 @@
+#+options: toc:nil num:nil author:nil
 
 * Redirect input, output and standard error
 

tutorial/rmlint.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * Use rmlint to search for duplicated or empty files
 
 ** Install in Parabola GNU-linux

tutorial/run_rscript.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * Run R scripts
 
 Write the script and save it. Then go to the directory where the script

tutorial/search_files.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * Searching
 
 ** Search for files

tutorial/sed_subsitute.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * Using 'sed' to substitute text
 
 "~sed~" is a stream editor for filtering and transforming text"...

tutorial/streaming_terminal.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * Streaming from terminal
 
 To watch a stream use video player such as 'mpv' or 'vlc' that supports streaming

tutorial/variables.org

@@ -1,3 +1,5 @@
+#+options: toc:nil num:nil author:nil
+
 * Variables and how to add a directory to $PATH
 
 System variables are stored in users environment