126 lines
4.2 KiB
Org Mode
Executable file
126 lines
4.2 KiB
Org Mode
Executable file
#+title: Lesson 05 | Command line Environment
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#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="../_share/media/css/missing-semester.css" />
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#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="../_share/media/css/org-media-sass/collapsible.css" />
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#+HTML_HEAD: <script src="../_share/media/js/collapsible.js"></script>
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#+OPTIONS: H:6
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* Links
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#+attr_html: :class links
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- [[../toc.org][TOC | Missing Semester]]
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- [[https://www.youtube.com/playlist?list=PLyzOVJj3bHQuloKGG59rS43e29ro7I57J][Playlist: Missing Semester]]
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- [[https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbVVJc2RzZ25nMmlrVW5zVGRsTS1fX2ladmRPQXxBQ3Jtc0ttWjQ5Ujcyd19TekNncTZGNEp1eDc3RWhzTzhvMW9oSTFoUl9JbGt1Mi0yU3FLc00wVUx1UXNJdFQxTjBjMWphdUZxNnU1WUYzTmFqd3RRemNLUDBJMlZkV3B0SnB4RVhpaUhvWWtnc1RISW1WVzdYWQ&q=https%3A%2F%2Fmissing.csail.mit.edu%2F2020%2Fcommand-line%2F&v=e8BO_dYxk5c][class notes]]
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- Curr: https://youtu.be/e8BO_dYxk5c?si=lIzq1GgkvRoRriWj&t=1531
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*** timestamps
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:PROPERTIES:
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:CUSTOM_ID: timestamp
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:END:
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#+attr_html: :class playlist
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+ [[https://youtu.be/e8BO_dYxk5c?si=A-imhHunQCtp_-Oz][00:00 - introduction]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=138s][02:18 - Job Control]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=227s][03:47 - Signal Interrupts]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=360s][06:00 - Python Program]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=672s][11:12 - The Kill Command]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=881s][14:41 - Terminal Multiplexer]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=1112s][18:32 - The Key Bindings]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=1536s][25:00 - Dot Files]] *current*
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=1799s][29:59 - Context Based Configuration File]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=2004s][33:24 - Terminal Emulator]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=2196s][36:36 - Aliases]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=2286s][38:06 - Common Folder Structure]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=2344s][39:04 - Symlinks]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=2552s][42:32 - ssh]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=2715s][45:15 - ssh keys]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=3057s][50:57 - ssh config]]
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+ [[https://www.youtube.com/watch?v=e8BO_dYxk5c&t=3231s][53:51 - changing the prefix]]
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* notes
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** topics
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- job control
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- terminal multiplexers
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- dot files / how to configure
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- work with remote machines
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** job control
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*** sleep
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- puts process to sleep for a specified amount of time
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- exit by typing Ctrl-C
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*** Ctrl-C
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- sends SIGINT - signal interrupt
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- man signal will show the list of signals
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** signals
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- SIGQUIT :: signal sent when we want to quit
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- SIGTERM :: similar to quit but not in term
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- SIGHUP :: when we have processes running but still want to close
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*** pausing
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- SIGSTOP :: pause execution of program
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- SIGCONT :: continue program
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*** python library
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- use import signal
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#+BEGIN_SRC python
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import signal
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def handler(signum, frame):
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printf("signal received")
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signal.signal(signal.SIGINT, handler)
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#+END_SRC
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- the above would catch a Ctrl-C and run it through handler
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- you use this by catching a Ctrl-C and running any saves or cleanup before exiting
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** nohup and jobs
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- allows for a process to continue livign when the terminal is killed
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*** example
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- sleep put the process to sleep
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- '&' puts the process in the background
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- wont take over the process
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#+BEGIN_SRC bash
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nohup sleep 2000 & python somprog.py
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#+END_SRC
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*** jobs
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- ~jobs~
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will show the suspended and running processes in background
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- how to restart a suspended process
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- type 'jobs' to see what there is in this terminal
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- the find the jobs number, ie [1] or [2]
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- use the 'bg' command
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#+BEGIN_SRC bash
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bg %1
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#+END_src
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** kill command
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- allows you to send any kind of signal to a job
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- e.g. "stop" will suspend but not close the job
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*** some commands
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- HUP :: Hang Up
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- STOP :: suspend
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- KILL :: kill it no matter what
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** Terminal Multiplexer
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*** overview
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- tmux
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- lets you create workspaces that you can work in
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- rearrange the environment
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- have different settings
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*** core concepts
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- hierarchy
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- sessions
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- windows
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- panes
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