11-26-2011
Replace specific field on specific line sed or awk
I'm trying to update a text file via sed/awk, after a lot of searching I still can't find a code snippet that I can get to work.
Brief overview:
I have user input a line to a variable, I then find a specific value in this line 10th field in this case. After asking for new input and doing some arithmetic I'd like to replace the 10th field on the 4th line(assuming user chose 4) in the input file.
Any ideas? Thanks in advance
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LEARN ABOUT DEBIAN
i3-input
I3-INPUT(1) i3 Manual I3-INPUT(1)
NAME
i3-input - interactively take a command for i3 window manager
SYNOPSIS
i3-input [-s <socket>] [-F <format>] [-l <limit>] [-P <prompt>] [-f <font>] [-v]
DESCRIPTION
i3-input is a tool to take commands (or parts of a command) composed by the user, and send it/them to i3. This is useful, for example, for
the mark/goto command.
You can press Escape to close i3-input without sending any commands.
OPTIONS
-s <socket>
Specify the path to the i3 IPC socket (it should not be necessary to use this option, i3-input will figure out the path on its own).
-F <format>
Every occurence of "%s" in the <format> string is replaced by the user input, and the result is sent to i3 as a command. Default value
is "%s".
-l <limit>
Set the maximum allowed length of the user input to <limit> characters. i3-input will automatically issue the command when the user
input reaches that length.
-P <prompt>
Display the <prompt> string in front of user input text field. The prompt string is not included in the user input/command.
-f <font>
Use the specified X11 core font (use xfontsel to chose a font).
-v
Show version and exit.
EXAMPLES
Mark a container with a single character:
i3-input -F 'mark %s' -l 1 -P 'Mark: '
Go to the container marked with above example:
i3-input -F '[con_mark="%s"] focus' -l 1 -P 'Go to: '
ENVIRONMENT
I3SOCK
i3-input handles the different sources of socket paths in the following order:
o I3SOCK environment variable
o I3SOCK gets overwritten by the -s parameter, if specified
o if neither are available, i3-input reads the socket path from the X11 property, which is the recommended way
o if everything fails, i3-input tries /tmp/i3-ipc.sock
The socket path is necessary to connect to i3 and actually issue the command.
SEE ALSO
i3(1)
AUTHOR
Michael Stapelberg and contributors
i3 4.1.2 01/01/2013 I3-INPUT(1)