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Linux Tips (II)

Posted on Edited on In Disqus:
A collection of Linux operations — very approachable, very powerful

Debugging Multi-File Projects with GDB

Use b file_name:line_number to debug:

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(gdb) break [<file-name>:]<line-num>

A Simple Python HTTP File Server

Create an http server with Python; it can serve as a simple downloader

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# First switch to the directory where the files live

# Start the service
> python2 -m SimpleHTTPServer
> python3 -m http.server

Then you can download directly with wget or aria2, e.g.

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> wget http://139.129.8.126:8000/lineage-15.0-20171004-BETA-3.0-oneplus2.zip

Using Tmux

  • A simple tmux setup (vi key bindings)

See the gist

  • Nested tmux: add this setting

StackOverFlow solution

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bind-key b send-prefix

In the second level, Ctrl-b b enters command mode.

  • tmux session saving

tmux session saving

xscast

GitHub

  • A powerful terminal screenshot tool that can display keystrokes — friendly for viewers

out.th.gif

Also, in its config kfinish, i.e. Ctrl-Insert, means finishing the screenshot. Believe it or not, the README doesn’t even say how to quit.

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# file location ~/.xscastrc
# the id that comes from `xinput --list'
xinput_id='10'
# dzen config
dh=20
dpad=20
dfont=monospace
dalign=l
dfg='#ffffff'
dbg='#000000'
dbar=yes
delay=0
# keybindings (in the same format as xscast output)
kfinish='C-Ins'
kclear='Ins'
# other examples: C-S-F1, A-n, C-R, F11

Text to ASCII

  • Text to ASCII Art Generator

TAAG

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___________                        _________                      __  .__    .__                 
\__    ___/__.__.______   ____    /   _____/ ____   _____   _____/  |_|  |__ |__| ____    ____   
  |    | <   |  |\____ \_/ __ \   \_____  \ /  _ \ /     \_/ __ \   __\  |  \|  |/    \  / ___\  
  |    |  \___  ||  |_> >  ___/   /        (  <_> )  Y Y  \  ___/|  | |   Y  \  |   |  \/ /_/  > 
  |____|  / ____||   __/ \___  > /_______  /\____/|__|_|  /\___  >__| |___|  /__|___|  /\___  /  
          \/     |__|        \/          \/             \/     \/          \/        \//_____/

Jumping Back from Vim Help

  • When using vim we often consult the help docs, but after opening a link in the docs we don’t know how to jump back
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Jump to a subject:  Position the cursor on a tag (e.g. bars) and hit CTRL-].  
   With the mouse:  ":set mouse=a" to enable the mouse (in xterm or GUI).     
                ¦   Double-click the left mouse button on a tag, e.g. ¦bars¦. 
        Jump back:  Type CTRL-T or CTRL-O.  Repeat to go further back.

CTRL-] jumps forward; CTRL-O/CTRL-T jump back.

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