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ת×Ô:http://fanqiang.chinaunix.net/program/code/2006-06-27/4695.shtml
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# find ~ -name core -exec file {} \; -exec rm -i {} \;
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# fuser -u /usr/my_application/foo
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#grep "hello world" `find ./ -name "*" -print -exec file {} \; |grep text | cut -d ':' -f 1`
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#alias dir='ls -Lla|grep ^d'
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#ifconfig | grep "inet addr" | grep -v "127.0.0.1" | awk '{print $2;}' | awk -F':' '{print $2;}'
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#ls -l | grep ^- | sort -nr -k 5 | more
#ls -lR | grep ^- | sort -nr -k 5 | more
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# strings name of binary file
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18 * * * 0 [`date "+%d"
` -gt 24] && /path/to/script
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# for f in *.abc; do mv $f `basename $f .abc`.def ; done
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