135 lines
2.5 KiB
Plaintext
135 lines
2.5 KiB
Plaintext
#+TITLE: bash commands
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#+DATE: 2021-08-30
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#+STARTUP: indent
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#+OPTIONS: num:nil
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* DONE work in bash tutorial
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:LOGBOOK:
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CLOCK: [2021-09-08 mié 18:52]--[2021-09-08 mié 19:22] => 0:30
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CLOCK: [2021-09-04 sáb 16:04]--[2021-09-04 sáb 16:34] => 0:30
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CLOCK: [2021-09-04 sáb 15:19]--[2021-09-04 sáb 15:49] => 0:30
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:END:
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* Execute stuffs
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* Show command history
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: history
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The file can be found in the user home:
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: /home/user/.bash_history
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** Convert pdf to text or html using poppler
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Use poppler and redirect the text to a org file.
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~pdftotext~ converts a pdf to "txt" if no other format is
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specified
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: pdftotext foo.pdf foo
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: pacman -S poppler
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: pdftotext foo.pdf ->> foo.org # first option
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: pdftotext foo.pdf foo.org # second option
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Convert pdf to html
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: pfdftohtml foo.pdf foo.html
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** Convert files using pandoc
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Use pandoc with "-s" flag to produce a standalone document and "-o" to
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redirect output to a file.
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In the example a file "foo" is converted from ~odt~ to ~org~
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: pandoc -s -o foo.org foo.odt
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** Convert files to pdf using libreoffice
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Convert odt file "tcl_online3.odt" to pdf
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: libreoffice --headless --convert-to pdf tcl_online3.odt
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** Backup a file
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Using "cp"
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: cp bbdb{,.bak}
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: bbdb.bak
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Backups with tar (tape archiver)
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Back up of "home"
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* c = create file
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* v = verbose
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* f = write to a file/device
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* z = compress the file (gzip) "tar.bz"
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* j = compress the file (bzip2)
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: tar -czvf /tmp/home.tar.gz /home
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** Simple code to encrypt
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Encrypt:
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: gpg -c X
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: gpg X
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Use the code to remove the original file:
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: shred --remove X
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** Download files
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This code download the file and the argument ~-O~ is to rename the file
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#+begin_example
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wget https://filetodownload.org -O new_file
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#+end_example
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* Devices
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- mount /what /where
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- what = device name
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- where = directory
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- /mnt = devices that mount occasionally
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- /media = devices that mount frequently
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: run/$USER/media/$LABEL
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* Evaluate time to load
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In emacs:
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: time emacs --eval '(save-buffers-kill-terminal)'
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* Cool commands
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: cal # calendar
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: clear # clear output
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: uname # display system information (-r, -p, -a)
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: wc # wordcount (file name)
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: date # check the date
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* References:
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* [[https://wiki-dev.bash-hackers.org/][The bash hackers wiki]]
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* [[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]]
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* [[https://pandoc.org/][Pandoc manual]]
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* [[https://stackoverflow.com/][stackoverflow]]
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