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.dsy:it. : Powered by vBulletin version 2.3.1 .dsy:it. > Didattica > Corsi N - Z > Sistemi operativi I > [esercizio shell]
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Elisabeth
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 [esercizio shell]

Sono alle prese con questo esercizio:
trovare l'utente con il maggior numero di file sul sistema
che mi sembrava fattibilissimo ma mi sta mandando in crisi.

Io lo risolverei così:


NFILE=0
for USER in $(cut /etc/passwd -d : -f 1)
do
FILE=$(find / -type f -user $USER | wc -l)
if (($FILE > $NFILE))
then
NFILE=$FILE
NUSER=$USER
fi
done
echo "L'utente $USER ha il maggior numero di file sul sistema, pari a $NFILE"

Ma mi da errore..qualche idea su cosa c'è di sbagliato?
04-09-2014 11:46
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Cronovirus
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Secondo me stai sbagliando sintassi nella condizione dell'if! guarda qui http://stackoverflow.com/questions/...thmetic-in-bash
04-09-2014 14:42
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Elisabeth
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Lo pensavo anche io, però provando a testare solamente l'if con le ((..)) funzionava :(

Alla fine ho optato per questa soluzione:

NFILE=0
for USER in $(cut /etc/passwd -d : -f 1)
do
FILE=$(find / -type f -user $USER | wc -l)
if [ $FILE -gt $NFILE ]
then
NFILE=$FILE
NUSER=$USER
fi
done
echo "L'utente $USER ha il maggior numero di file sul sistema, pari a $NFILE"
04-09-2014 15:04
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Cronovirus
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ma aspetta: che errore ti dava?
04-09-2014 15:37
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Elisabeth
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aaa non mi ricordo purtroppo.
Ma va beh, ormai il laboratorio è andato :)
07-09-2014 09:23
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rogerino
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mi sapete dire come si risolve questo esercizio:

copiare tutti i file da /usr/bin nella directory corrente cambiando l'estensione da .h a .bak??
09-02-2015 13:14
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giuscri
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Originally posted by rogerino
mi sapete dire come si risolve questo esercizio:

copiare tutti i file da /usr/bin nella directory corrente cambiando l'estensione da .h a .bak??

Per i posteri, una possibile soluzione:
code:
cp -r /usr/bin /tmp/_bin;
for FILENAME in $(find /tmp/_bin -type f|egrep "\.h$"); do
    mv $FILENAME $(echo $FILENAME|sed -r "s/\.h$/.bak/");
done;
cp -r /tmp/_bin/* .

23-07-2015 13:28
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