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Full Discussion: Find and delete a certain HEX and its following value in a file
Top Forums Shell Programming and Scripting Find and delete a certain HEX and its following value in a file Post 303012987 by surfi on Tuesday 13th of February 2018 10:42:03 AM
Old 02-13-2018
Question Find and delete a certain HEX and its following value in a file
Hello there,

I've been trying to do this half of the day and it's like I haven't come a single step further, so I hope you guys can help me with my problem:

I have a text file that contains strings that should not be there and which I want to delete automatically from the command line. The character string always consists of two characters, beginning with the hex value "01" (e. g."01 90").

My task is therefore:"search for HEX value 01 and delete this and the following HEX-value". However, I'm too stupid for this task...

Can anyone help me or give me a suggestion which command I need? I've tried tr and sed so far..
 

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LEARN ABOUT DEBIAN

dccplsi

DCCPLSI(1)							  LTP executables							DCCPLSI(1)

NAME

       dccplsi - DCCP-based LTP link service input task

SYNOPSIS

       dccplsi {local_hostname | @}[:local_port_nbr]

DESCRIPTION

       dccplsi is a background "daemon" task that receives DCCP datagrams via a DCCP socket bound to local_hostname and local_port_nbr, extracts
       LTP segments from those datagrams, and passes them to the local LTP engine.  Host name "@" signifies that the host name returned by
       hostname(1) is to be used as the socket's host name.  If not specified, port number defaults to 1113.

       The link service input task is spawned automatically by ltpadmin in response to the 's' command that starts operation of the LTP protocol;
       the text of the command that is used to spawn the task must be provided as a parameter to the 's' command.  The link service input task is
       terminated by ltpadmin in response to an 'x' (STOP) command.

EXIT STATUS

       0   dccplsi terminated normally, for reasons noted in the ion.log file.	If this termination was not commanded, investigate and solve the
	   problem identified in the log file and use ltpadmin to restart dccplsi.

       1   dccplsi terminated abnormally, for reasons noted in the ion.log file.  Investigate and solve the problem identified in the log file,
	   then use ltpadmin to restart dccplsi.

FILES

       No configuration files are needed.

ENVIRONMENT

       No environment variables apply.

DIAGNOSTICS

       The following diagnostics may be issued to the ion.log log file:

       dccplsi can't initialize LTP.
	   ltpadmin has not yet initialized LTP protocol operations.

       LSI task is already started.
	   Redundant initiation of dccplsi.

       LSI can't open DCCP socket. This probably means DCCP is not supported on your system.
	   Operating system error. This probably means that you are not using an operating system that supports DCCP. Make sure that you are using
	   a current Linux kernel and that the DCCP modules are being compiled. Check errtext, correct problem, and restart dccplsi.

       LSI can't initialize socket.
	   Operating system error.  Check errtext, correct problem, and restart dccplsi.

       LSI can't create listener thread.
	   Operating system error.  Check errtext, correct problem, and restart dccplsi.

BUGS

       Report bugs to <ion-bugs@korgano.eecs.ohiou.edu>

SEE ALSO

       ltpadmin(1), dccplso(1), owltsim(1)

perl v5.14.2							    2012-05-25								DCCPLSI(1)
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