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Full Discussion: Help in renaming file !!!
Top Forums UNIX for Dummies Questions & Answers Help in renaming file !!! Post 302116122 by kumarsaravana_s on Wednesday 2nd of May 2007 02:55:01 AM
Old 05-02-2007
Help in renaming file !!!
Hi All,

I want to rename a file inside a script which has a date portion appended at the start of the file name.

The script i wrote works fine when the file comes on a day to day basis but sometimes it comes late too.

#!/usr/bin/ksh

cd /space/file/source

dt=$(date "date "+%m%d%Y")
mv $dt_xxx_yyy_aaa_bbb.txt xxx_yyy_aaa_bbb_$dt.txt

input:
04302007_xxx_yyy_aaa_bbb.txt

output should be like
xxx_yyy_aaa_bbb_04302007.txt.

I know sed or awk can do this by extracting the numeric part and then appending it to the end of file name.But me totally new to such things.Can someone help me extracting the date portion and then adding it just before the extension?

Thanks,
Kumar
 

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LEARN ABOUT LINUX

motd.tail

MOTD.TAIL(5)						   Debian Administrator's Manual					      MOTD.TAIL(5)

NAME

       motd.tail - Template for building the system message of the day

DESCRIPTION

       On Debian systems, the system message of the day is rebuilt at each startup, in order to display an accurate information. /etc/motd.tail is
       the file to edit permanent changes to the message of the day.

OVERVIEW

       The initiation script /etc/init.d/bootmisc.sh prepends a line containing information about the system  to  /etc/motd.tail  and  stores  the
       resulting  file in /var/run/motd. /etc/motd is a symbolic link to /var/run/motd.  This is done to prevent changes to /etc as the system can
       not assume /etc to be writable.

       Changes to /etc/motd effectively end up in a file under /var/run which will be regenerated upon reboot.

       A symbolic link to a different file, such as /etc/motd.static disables this behaviour.

FILES

       /etc/init.d/bootmisc.sh
	      The initiation script which builds /var/run/motd

       /etc/motd
	      Symbolic link to the system message of the day at /var/run/motd

       /etc/motd.tail
	      Template for building the system message of the day

       /var/run/motd
	      System message of the day file rebuilt at each computer start

SEE ALSO

       login(1), issue(5), motd(5).

Debian								    2007-04-28							      MOTD.TAIL(5)
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