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Top Forums Shell Programming and Scripting invoke unix variable in SED command Post 302420267 by vjayraghavan on Tuesday 11th of May 2010 06:52:07 AM
Old 05-11-2010
invoke unix variable in SED command

Hi,

I am trying tio invoke unix variable in a sed command like below, but it seems to be failing..

Code:
a=1
sed -n '$a,$p' file.txt    ### Failing

but

Code:
a=1
sed -n '1,$p' files.txt    ### Works fine


Please help me to fix this... Thanks in advance
 

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I3-MSG(1)							     i3 Manual								 I3-MSG(1)

NAME
i3-msg - send messages to i3 window manager SYNOPSIS
i3-msg [-t type] [message] IPC MESSAGE TYPES
command The payload of the message is a command for i3 (like the commands you can bind to keys in the configuration file) and will be executed directly after receiving it. get_workspaces Gets the current workspaces. The reply will be a JSON-encoded list of workspaces. get_outputs Gets the current outputs. The reply will be a JSON-encoded list of outputs (see the reply section). get_tree Gets the layout tree. i3 uses a tree as data structure which includes every container. The reply will be the JSON-encoded tree. get_marks Gets a list of marks (identifiers for containers to easily jump to them later). The reply will be a JSON-encoded list of window marks. get_bar_config Gets the configuration (as JSON map) of the workspace bar with the given ID. If no ID is provided, an array with all configured bar IDs is returned instead. DESCRIPTION
i3-msg is a sample implementation for a client using the unix socket IPC interface to i3. EXAMPLES
# Use 1-px border for current client i3-msg "border 1pixel" # You can leave out the quotes i3-msg border normal # Dump the layout tree i3-msg -t get_tree ENVIRONMENT
I3SOCK If no ipc-socket is specified on the commandline, this variable is used to determine the path, at wich the unix domain socket is expected, on which to connect to i3. SEE ALSO
i3(1) AUTHOR
Michael Stapelberg and contributors i3 4.1.2 01/01/2013 I3-MSG(1)
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