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Full Discussion: Find & Replace
Top Forums UNIX for Dummies Questions & Answers Find & Replace Post 302742781 by Corona688 on Tuesday 11th of December 2012 02:35:27 PM
Old 12-11-2012
sed is not the be-all and end-all of text. I'm not sure what I'd even use it for here since you're just replacing everything with everything...

Code:
read YYYYMMDD HH MM SS <<EOF
`date '+%Y%m%d %H %M %S'`
EOF

[ "${HH:0:1}" = "0" ] && HH="${HH:1}"
[ "${MM:0:1}" = "0" ] && MM="${MM:1}"
[ "${SS:0:1}" = "0" ] && SS="${SS:1}"

for FILE in *.gb
do
        echo mv "$FILE" "$YYYY-$HH$MM$SS.gb"

        let SS=SS+1

        [ "$SS" -gt 59 ] && SS=0 && let MM=MM+1
        [ "$MM" -gt 59 ] && MM=0 && let HH=HH+1
        [ "$HH" -gt 23 ] && HH=0
done

Remove the echo once you've tested and are sure it does what you want.

bipinajith's code is much simpler Smilie But if you have 500 files, will take 8 minutes...
This User Gave Thanks to Corona688 For This Post:
 

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RENAME(1)						 Perl Programmers Reference Guide						 RENAME(1)

NAME
rename - renames multiple files SYNOPSIS
rename [ -v ] [ -n ] [ -f ] perlexpr [ files ] DESCRIPTION
"rename" renames the filenames supplied according to the rule specified as the first argument. The perlexpr argument is a Perl expression which is expected to modify the $_ string in Perl for at least some of the filenames specified. If a given filename is not modified by the expression, it will not be renamed. If no filenames are given on the command line, filenames will be read via standard input. For example, to rename all files matching "*.bak" to strip the extension, you might say rename 's/.bak$//' *.bak To translate uppercase names to lower, you'd use rename 'y/A-Z/a-z/' * OPTIONS
-v, --verbose Verbose: print names of files successfully renamed. -n, --no-act No Action: show what files would have been renamed. -f, --force Force: overwrite existing files. ENVIRONMENT
No environment variables are used. AUTHOR
Larry Wall SEE ALSO
mv(1), perl(1) DIAGNOSTICS
If you give an invalid Perl expression you'll get a syntax error. BUGS
The original "rename" did not check for the existence of target filenames, so had to be used with care. I hope I've fixed that (Robin Barker). perl v5.14.2 2014-09-26 RENAME(1)
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