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cp ./*/*attch* /testout_attch/
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head/tail:
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¡¡¡¡head -6 readme.txt
¡¡¡¡## (2) displays the last 25 lines of a file
¡¡¡¡tail -25 mail.txt
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¡¡¡¡head -20 file | tail -10
tail -f Ë¢ÐÂÏÔʾ
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history|less
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du --max-depth=N -h(--human-readable)
du -a(all)b(bytes) = ll
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fdisk -l = fdisk /dev/sda1 ->p
df
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ps -ef|grep httpd|wc -l
ps -auxf
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netstat -an|grep -i "80"|wc -l
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dig yahoo.com a +noall +answer
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dig yahoo.com mx +noall +answer
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dig yahoo.com ns +noall +answer
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dig yahoo.com any +noall +answer
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find -anewer
(touch -d xx)
find -exec commond "{}"
(find .-name '*.zip' -exec unzip "{}"\;)
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main ()
{
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