Fix typos
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@ -35,12 +35,13 @@ opportunity to learn about computers, files, directories and programs.
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* [[./tutorial/rsync.org][Using rsync to copy files]]
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* [[./tutorial/search_files.org][Searching for files in the system]]
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* [[./tutorial/diff.org][Comparing two files or directories: 'diff']]
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* [[./tutorial/diff_patch.org][Comparing two files and create a unified version: diff and patch]]
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* [[./tutorial/dd_command_flash_usb.org][Using dd command to flash usb]]
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* [[./tutorial/compress_pdf.org][Compress a pdf file]]
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* [[./tutorial/luakit.org][Searching and editing configuration files]]
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* [[./tutorial/pacman.org][Use package manager in Parabola GNU-linux: verify packages in cache]]
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* [[./tutorial/removing_packages.org][Removing packages in Parabola GNU-Linux]]
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* [[./tutorial/diff_patch.org][diff and patch]]
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** Disk space utilization and manipulation
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@ -1,100 +0,0 @@
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#+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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** 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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@ -1,4 +1,5 @@
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#+options: toc:nil num:nil
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#+date: 2022-09-24
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* Comparing the content of two files or directories
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@ -9,22 +10,29 @@
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To compare the content of two files use something like
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#+begin_example bash
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diff file1.txt file2.txt
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diff file1.txt file2.txt
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#+end_example
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You can redirect the output to a file and make a patch: a file containing the differences between both files
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#+begin_example bash
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diff file1.txt file2.txt patch.txt
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diff file1.txt file2.txt > patch.txt
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#+end_example
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** Comparing directories
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Some arguments may be hepful to have an output showing the differences between two directories:
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~--brief~ (show only the differences) and ~-r~ (compare the directories that are located within the main directory also)
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~--brief~ (show only the differences) and ~-r~ (compare the directories that are located within the main directory also)
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#+begin_example bash
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diff --brief -r directory1 directory2
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#+end_example
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Another approach to compare all the files within each directory is to use:
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- ~q~ : Shows only differences
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- ~r~ : Run the command recursively
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#+begin_example bash
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diff -qr directory1 directory2
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#+end_example
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@ -45,9 +45,3 @@ Remove all of uninstalled packages in cache
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...90.88 Mib
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Run this to see issues in the system
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#+begin_example sh
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journalctl -p 3 -xb
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#+end_example
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