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Full Discussion: File manipulation place 0 before the number using sed
Top Forums UNIX for Beginners Questions & Answers File manipulation place 0 before the number using sed Post 303039598 by MadeInGermany on Thursday 10th of October 2019 03:52:43 AM
Old 10-10-2019
You must capture a digit that is followed by a space. Because all the matched part is substituted, you must put it back with \1 and \2 that refer to the 1st and 2nd \(capture group\).
Code:
sed 's/\(Oct\) \([1-9]\) /\1 0\2 /g' sample_file.txt

Because I put the Oct in a group, you can easily generalize it, to match all 3-letter month names: \([A-Z][a-z][a-z]\)
This User Gave Thanks to MadeInGermany For This Post:
Neo
 

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LEARN ABOUT DEBIAN

evtest-capture

EVTEST-CAPTURE(1)														 EVTEST-CAPTURE(1)

NAME

       evtest-capture - Input device event capture program

SYNOPSIS

       evtest-capture "/dev/input/eventX" [evtest-capture.xml]

DESCRIPTION

       evtest-capture captures the information and events from the input device specified on the command line and writes it to the xml file given.
       If no filename is given for the output file, evtest-capture.xml is chosen as default.

       evtest-capture needs to be able to read from the device; in most cases this means it must be run as root.

       Together with with evtest-create-device.xsl, a simple uinput-based software input device can be created that replays the events as if the
       same input was performed on the physical device. This can be useful to replicate bugs with input devices in upper layers of the stack.

       To convert evtest-capture.xml into such a uinput device, run:

	   xsltproc evtest-create-device.xls evtest-capture.xml > mydevice.c
	   gcc -o mydevice mydevice.c
	   ./mydevice

DIAGNOSTICS

       If evtest-capture does not see any events even though the device is being used, the device may be grabbed by a process (EVIOCGRAB). This is
       usually the case when debugging a synaptics device from within X. VT switching to a TTY or shutting down the X server terminates this grab
       and synaptics devices can be debugged.

SEE ALSO

       evtest(1)

AUTHOR

       evtest-capture was written by Peter Hutterer <peter.hutterer@redhat.com[1]>.

NOTES

	1. peter.hutterer@redhat.com
	   mailto:peter.hutterer@redhat.com

								    05/21/2012							 EVTEST-CAPTURE(1)
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