Ordina i risultati da trovare e afferrare sottoinsieme (bash)

Question

Ho una coppia di script bash, 1 che scarica DBS mysql, e il secondo per eliminare i vecchi backup .

Ho sempre fatto affidamento su data, in modo da tutti i file più vecchi di 7 giorni vengono eliminati, e nuovi backup creati tutti i giorni. Il risultato è stato una serie di sostegni 7 giorni indietro.

Bene, ora che ho 20 + DBS Ho separato che lavoro quotidiano in un lavoro quotidiano e settimanale. Se continuo a utilizzare il metodo Find e la data avrei perso la scorsa settimana.

DOMANDA

Come faccio a ordinare l'output di un ritrovamento in base alla data, e quindi eliminare tutti ma il più recente 7. (quindi, anche se il più recente è di 2 mesi di età, rimane)

Questo è quanto ho ottenuto, ma non è come previsto. Forse usando ls potrebbe essere la scelta migliore 9find è un residuo con data come unico criterio di spurgo)

OLDFILES=`find -regex .*sql.*`

set -- $OLDFILES

if [ -z $1 ]
then
    printf "\tNo files matching purge criteria\n" | tee -a $LOGFILE
else
    printf "\tSQL Files being Delete from $HERE\n" | tee -a $LOGFILE
    printf "\t\t%s\n" $OLDFILES  | tee -a $LOGFILE
fi
# $RETAIN is the # of recent to keep
# so I want to grab a subset from 0 to (total - retain), and purge them
TOBURN=$(( $# - $RETAIN ))
printf " grab first %s files. %s  - %s" $TOBURN $# $RETAIN
if [ $TOBURN -gt 0 ]
then
    TOPURGE=("$@:0:$TOBURN")
    printf "\n\nREMOVING..\n\t\t%s\n" $TOPURGE
fi

---

I file esistenti

            ./webbmaster_bellarose_joomla_01-09-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-25-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-10-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-04-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-25-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-29-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-30-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-28-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-06-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-13-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-24-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-21-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-24-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-27-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-26-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-17-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-03-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-21-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-20-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-16-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-31-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-11-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-05-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-14-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-22-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-12-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-17-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-18-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-20-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-08-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-22-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-27-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-23-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-07-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-26-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-19-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-29-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-15-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-28-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-01-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-18-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-02-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-23-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-19-2009.sql.gz

Obiettivi per lo spurgo (che ho da inserire nella variabile per semplice rm -f $ var)

            ./webbmaster_bellarose_joomla_01-09-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-25-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-10-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-04-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-30-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-28-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-06-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-13-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-21-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-24-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-27-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-17-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-03-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-21-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-20-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-16-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-31-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-11-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-05-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-14-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-22-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-12-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-17-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-18-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-20-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-08-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-22-2009.sql.gz
            ./webbmaster_bellarose_joomla_12-23-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-07-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-26-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-19-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-29-2009.sql.gz
            ./webbmaster_bellarose_joomla_01-15-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-01-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-18-2010.sql.gz
            ./webbmaster_bellarose_joomla_01-02-2010.sql.gz
            ./webbmaster_bellarose_joomla_12-19-2009.sql.gz

(date 1/23 - 1/29 vengono lasciati intatti)

Answer 1

Fatevi (e tutti gli altri) un grosso favore e iniziare a scrivere le date in ISO- 8601 (cioè YYYY-MM-DD) .

es. invece di

./webbmaster_bellarose_joomla_12-29-2009.sql.gz

si avrebbe

./webbmaster_bellarose_joomla_2009-12-29.sql.gz

In questo modo avere molti benefici , cosa più importante qui che l'ordine cronologico e alfabetico diventa identica. Non c'è bisogno di trovare, basta elencare i file, ordine inverso, eliminare i primi 7 linee ed eliminare i file rimanenti:

ls *sql* | tac | sed 1,7d | tr '\012' '\000' | xargs -0 --no-run-if-empty rm

---

Aggiornamento: Che cosa si intende per "andare avanti"? Come fas come io posso dire la mia soluzione risolve il problema al 100%:

/tmp/so>cat existing_files
./webbmaster_bellarose_joomla-2009-12-17.sql.gz
./webbmaster_bellarose_joomla-2009-12-18.sql.gz
./webbmaster_bellarose_joomla-2009-12-19.sql.gz
./webbmaster_bellarose_joomla-2009-12-20.sql.gz
./webbmaster_bellarose_joomla-2009-12-21.sql.gz
./webbmaster_bellarose_joomla-2009-12-22.sql.gz
./webbmaster_bellarose_joomla-2009-12-23.sql.gz
./webbmaster_bellarose_joomla-2009-12-24.sql.gz
./webbmaster_bellarose_joomla-2009-12-25.sql.gz
./webbmaster_bellarose_joomla-2009-12-26.sql.gz
./webbmaster_bellarose_joomla-2009-12-27.sql.gz
./webbmaster_bellarose_joomla-2009-12-28.sql.gz
./webbmaster_bellarose_joomla-2009-12-29.sql.gz
./webbmaster_bellarose_joomla-2009-12-30.sql.gz
./webbmaster_bellarose_joomla-2009-12-31.sql.gz
./webbmaster_bellarose_joomla-2010-01-01.sql.gz
./webbmaster_bellarose_joomla-2010-01-02.sql.gz
./webbmaster_bellarose_joomla-2010-01-03.sql.gz
./webbmaster_bellarose_joomla-2010-01-04.sql.gz
./webbmaster_bellarose_joomla-2010-01-05.sql.gz
./webbmaster_bellarose_joomla-2010-01-06.sql.gz
./webbmaster_bellarose_joomla-2010-01-07.sql.gz
./webbmaster_bellarose_joomla-2010-01-08.sql.gz
./webbmaster_bellarose_joomla-2010-01-09.sql.gz
./webbmaster_bellarose_joomla-2010-01-10.sql.gz
./webbmaster_bellarose_joomla-2010-01-11.sql.gz
./webbmaster_bellarose_joomla-2010-01-12.sql.gz
./webbmaster_bellarose_joomla-2010-01-13.sql.gz
./webbmaster_bellarose_joomla-2010-01-14.sql.gz
./webbmaster_bellarose_joomla-2010-01-15.sql.gz
./webbmaster_bellarose_joomla-2010-01-16.sql.gz
./webbmaster_bellarose_joomla-2010-01-17.sql.gz
./webbmaster_bellarose_joomla-2010-01-18.sql.gz
./webbmaster_bellarose_joomla-2010-01-19.sql.gz
./webbmaster_bellarose_joomla-2010-01-20.sql.gz
./webbmaster_bellarose_joomla-2010-01-21.sql.gz
./webbmaster_bellarose_joomla-2010-01-22.sql.gz
./webbmaster_bellarose_joomla-2010-01-23.sql.gz
./webbmaster_bellarose_joomla-2010-01-24.sql.gz
./webbmaster_bellarose_joomla-2010-01-25.sql.gz
./webbmaster_bellarose_joomla-2010-01-26.sql.gz
./webbmaster_bellarose_joomla-2010-01-27.sql.gz
./webbmaster_bellarose_joomla-2010-01-28.sql.gz
./webbmaster_bellarose_joomla-2010-01-29.sql.gz
/tmp/so>cat targets_for_purging
./webbmaster_bellarose_joomla-2009-12-17.sql.gz
./webbmaster_bellarose_joomla-2009-12-18.sql.gz
./webbmaster_bellarose_joomla-2009-12-19.sql.gz
./webbmaster_bellarose_joomla-2009-12-20.sql.gz
./webbmaster_bellarose_joomla-2009-12-21.sql.gz
./webbmaster_bellarose_joomla-2009-12-22.sql.gz
./webbmaster_bellarose_joomla-2009-12-23.sql.gz
./webbmaster_bellarose_joomla-2009-12-24.sql.gz
./webbmaster_bellarose_joomla-2009-12-25.sql.gz
./webbmaster_bellarose_joomla-2009-12-26.sql.gz
./webbmaster_bellarose_joomla-2009-12-27.sql.gz
./webbmaster_bellarose_joomla-2009-12-28.sql.gz
./webbmaster_bellarose_joomla-2009-12-29.sql.gz
./webbmaster_bellarose_joomla-2009-12-30.sql.gz
./webbmaster_bellarose_joomla-2009-12-31.sql.gz
./webbmaster_bellarose_joomla-2010-01-01.sql.gz
./webbmaster_bellarose_joomla-2010-01-02.sql.gz
./webbmaster_bellarose_joomla-2010-01-03.sql.gz
./webbmaster_bellarose_joomla-2010-01-04.sql.gz
./webbmaster_bellarose_joomla-2010-01-05.sql.gz
./webbmaster_bellarose_joomla-2010-01-06.sql.gz
./webbmaster_bellarose_joomla-2010-01-07.sql.gz
./webbmaster_bellarose_joomla-2010-01-08.sql.gz
./webbmaster_bellarose_joomla-2010-01-09.sql.gz
./webbmaster_bellarose_joomla-2010-01-10.sql.gz
./webbmaster_bellarose_joomla-2010-01-11.sql.gz
./webbmaster_bellarose_joomla-2010-01-12.sql.gz
./webbmaster_bellarose_joomla-2010-01-13.sql.gz
./webbmaster_bellarose_joomla-2010-01-14.sql.gz
./webbmaster_bellarose_joomla-2010-01-15.sql.gz
./webbmaster_bellarose_joomla-2010-01-16.sql.gz
./webbmaster_bellarose_joomla-2010-01-17.sql.gz
./webbmaster_bellarose_joomla-2010-01-18.sql.gz
./webbmaster_bellarose_joomla-2010-01-19.sql.gz
./webbmaster_bellarose_joomla-2010-01-20.sql.gz
./webbmaster_bellarose_joomla-2010-01-21.sql.gz
./webbmaster_bellarose_joomla-2010-01-22.sql.gz
/tmp/so>sed 's/\(.\{29\}\)_\(..-..\)-\(....\)/\1-\3-\2/' existing_files | sort > existing_files.8601
/tmp/so>sed 's/\(.\{29\}\)_\(..-..\)-\(....\)/\1-\3-\2/' targets_for_purging | sort > targets_for_purging.8601
/tmp/so>mkdir files
/tmp/so>cd files
/tmp/so/files>xargs touch < ../existing_files.8601
/tmp/so/files>ls -1
webbmaster_bellarose_joomla-2009-12-17.sql.gz
webbmaster_bellarose_joomla-2009-12-18.sql.gz
webbmaster_bellarose_joomla-2009-12-19.sql.gz
webbmaster_bellarose_joomla-2009-12-20.sql.gz
webbmaster_bellarose_joomla-2009-12-21.sql.gz
webbmaster_bellarose_joomla-2009-12-22.sql.gz
webbmaster_bellarose_joomla-2009-12-23.sql.gz
webbmaster_bellarose_joomla-2009-12-24.sql.gz
webbmaster_bellarose_joomla-2009-12-25.sql.gz
webbmaster_bellarose_joomla-2009-12-26.sql.gz
webbmaster_bellarose_joomla-2009-12-27.sql.gz
webbmaster_bellarose_joomla-2009-12-28.sql.gz
webbmaster_bellarose_joomla-2009-12-29.sql.gz
webbmaster_bellarose_joomla-2009-12-30.sql.gz
webbmaster_bellarose_joomla-2009-12-31.sql.gz
webbmaster_bellarose_joomla-2010-01-01.sql.gz
webbmaster_bellarose_joomla-2010-01-02.sql.gz
webbmaster_bellarose_joomla-2010-01-03.sql.gz
webbmaster_bellarose_joomla-2010-01-04.sql.gz
webbmaster_bellarose_joomla-2010-01-05.sql.gz
webbmaster_bellarose_joomla-2010-01-06.sql.gz
webbmaster_bellarose_joomla-2010-01-07.sql.gz
webbmaster_bellarose_joomla-2010-01-08.sql.gz
webbmaster_bellarose_joomla-2010-01-09.sql.gz
webbmaster_bellarose_joomla-2010-01-10.sql.gz
webbmaster_bellarose_joomla-2010-01-11.sql.gz
webbmaster_bellarose_joomla-2010-01-12.sql.gz
webbmaster_bellarose_joomla-2010-01-13.sql.gz
webbmaster_bellarose_joomla-2010-01-14.sql.gz
webbmaster_bellarose_joomla-2010-01-15.sql.gz
webbmaster_bellarose_joomla-2010-01-16.sql.gz
webbmaster_bellarose_joomla-2010-01-17.sql.gz
webbmaster_bellarose_joomla-2010-01-18.sql.gz
webbmaster_bellarose_joomla-2010-01-19.sql.gz
webbmaster_bellarose_joomla-2010-01-20.sql.gz
webbmaster_bellarose_joomla-2010-01-21.sql.gz
webbmaster_bellarose_joomla-2010-01-22.sql.gz
webbmaster_bellarose_joomla-2010-01-23.sql.gz
webbmaster_bellarose_joomla-2010-01-24.sql.gz
webbmaster_bellarose_joomla-2010-01-25.sql.gz
webbmaster_bellarose_joomla-2010-01-26.sql.gz
webbmaster_bellarose_joomla-2010-01-27.sql.gz
webbmaster_bellarose_joomla-2010-01-28.sql.gz
webbmaster_bellarose_joomla-2010-01-29.sql.gz
/tmp/so/files>ls *sql* | tac | sed 1,7d | tr '\012' '\000' | xargs -0 --no-run-if-empty rm
/tmp/so/files>ls -1 ./*
./webbmaster_bellarose_joomla-2010-01-23.sql.gz
./webbmaster_bellarose_joomla-2010-01-24.sql.gz
./webbmaster_bellarose_joomla-2010-01-25.sql.gz
./webbmaster_bellarose_joomla-2010-01-26.sql.gz
./webbmaster_bellarose_joomla-2010-01-27.sql.gz
./webbmaster_bellarose_joomla-2010-01-28.sql.gz
./webbmaster_bellarose_joomla-2010-01-29.sql.gz
/tmp/so/files>comm -3 ../existing_files.8601 ../targets_for_purging.8601
./webbmaster_bellarose_joomla-2010-01-23.sql.gz
./webbmaster_bellarose_joomla-2010-01-24.sql.gz
./webbmaster_bellarose_joomla-2010-01-25.sql.gz
./webbmaster_bellarose_joomla-2010-01-26.sql.gz
./webbmaster_bellarose_joomla-2010-01-27.sql.gz
./webbmaster_bellarose_joomla-2010-01-28.sql.gz
./webbmaster_bellarose_joomla-2010-01-29.sql.gz
/tmp/so/files>

Answer 2

Se i file sono tutti in una directory (cioè non è necessario utilizzare per trovare ricorsione però sottodirectory), è possibile utilizzare l'argomento -t per ls (1) per ordinare l'elenco dei file dal tempo e quindi rimuovere il primo 7 voci con coda (1).

rm -f $(ls -t *sql* | tail -n +8)

[Edit: ho aggiunto -f nel caso in cui i risultati di sostituzione in un elenco vuoto]

o in un ciclo ...

ls -t *sql* | tail -n +8 | while read file
    echo "Purging: $file"
    rm "$file"
done

L'argomento di coda è +8 perché si vuole che inizi tailing dal 8 linea di poi (vale a dire far cadere il primo 7).

Dopo aver rimosso i file, si può semplicemente bruciare quello che è rimasto.

Answer 3

OLDIFS="$IFS"
IFS=$'\n'
topurge=($(find -mindepth 1 -printf "%T@ %P\n" | sort -n -r | cut -d' ' -f 2- | tail -n +7))
IFS="$OLDIFS"

Answer 4

Ecco un pensiero:

oldest_to_keep=`find . -name \*.sql | xargs \ls -1rc | tail -7 | head -1`
find . -name \*.sql -not -samefile $oldest_to_keep -not -newer $oldest_to_keep

Se il secondo ritrovamento dovrebbe avere -exec rm \{\} ; se hai convinto te questo è sano di mente. :)