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stampare righe precedenti ad un match in file

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# 1  
Old 08-04-2009
stampare righe precedenti ad un match in file
Salve a tutti...volevo chiedere a voi,che sicuramente ne sapete piu di me,come posso ottenere la seguente soluzione:

ho un file del tipo:

CIAO COME STAI
PERCHE COME STAI
CIAO COME VA
ALLO CHE FACCIAMO
.................

io vorre che nel caso in cui in una riga è presenta la parola "CHE" allora stampo a video le tre righe precedenti alla parola ottenendo quindi:

CIAO COME STAI
PERCHE COME STAI
CIAO COME VA


Come shell uso la KORN SHELL..vi ringrazio in anticipo per l'aiuto...
# 2  
Old 08-04-2009
Hello.

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