Dizzy Gillespie on Music

"...and all about how music can transport people spiritually."


Dizzy Gillespie in Carr, I., Fairweather, D, Brian P, The rough guide to Jazz. page. 291.

Using back references in SED

Today I have several CSV files, everyone with a header at the first line and a date at the first fields with the format mm/dd/yyyy. It was necessary to change that field into the format yyyy-mm-dd.

Here there is a Perl solution and also a SED one:

#!/usr/bin/perl
use strict;
use warnings;
while (<>) {
        chomp;
        if (/^[^0-9]/) {
                print "$_\n";
                next;
        }
        my @Fields = split /,/, $_, 2;
        my ($Month, $Day, $Year) = split /\//, $Fields[0];
        print "$Year-$Month-$Day, $Fields[1]\n";
}
__END__

sed -i.bak 's/^\([0-9]\+\)\/\([0-9]\+\)\/\([0-9]\+\)/\3-\1-\2/' *.csv

Yesterday on my way home I realized that the Perl script was horrible, a one-liner should be OK, like the one below:

perl -i.bak -pe 's!(\d+)/(\d+)/(\d+)!\3-\1-\2!' *.csv

Deleting Glassfish old logs

#!/bin/bash


DAYS_TO_KEEP=$((7 * 86400))     # In seconds
LOG_DIR=/var/lib/glassfishv2/domains/domain1/logs
TODAY=$(date +%s)


for FileName in $(ls ${LOG_DIR}/server.log_*)
do
        FileDate=$(stat --printf=%Y ${FileName})


        DateDiff=$((TODAY - FileDate))


        if [ $DateDiff -gt ${DAYS_TO_KEEP} ]
        then
                echo Deleting ${FileName} ${FileDate} ${TODAY} ${DateDiff}
                rm ${FileName}
        fi


done


##END##

Glassfish start/stop script for Ubuntu

#!/bin/bash


GF_DIR=/usr/share/glassfishv2
GF_DOMAIN_DIR=/var/lib/glassfishv2/domains/domain1


case "$1" in
        start)
                #${GLASSFISHHOME}/bin/asadmin start-database
                ${GF_DIR}/bin/asadmin start-domain --user admin --passwordfile ${GF_DOMAIN_DIR}/config/password domain1
                ;;
        stop)
                ${GF_DIR}/bin/asadmin stop-domain domain1
                #${GLASSFISHHOME}/bin/asadmin stop-database
                ;;
        restart)
                ${GF_DIR}/bin/asadmin stop-domain domain1
                #${GLASSFISHHOME}/bin/asadmin stop-database
                #${GLASSFISHHOME}/bin/asadmin start-database
                ${GF_DIR}/bin/asadmin start-domain --user admin --passwordfile ${GF_DOMAIN_DIR}/config/passwordfile domain1
                ;;
*)
        echo $"usage: $0 {start|stop|restart}"
        exit 1
esac


##END##