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Linux Shell编程

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+ Who uses Linux?

US Navy ICBC US Federal Court German universities Cuba

Novell Google IBM Panasonic Cisco

NYSE Wikipedia Peugeot Amazon Third world Schools

+Linux alternatives for Windows

+Who’s Who

Linus Torvalds

Richard Stallman

+ Main Linux distributions

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Unix philosophy：

Everything is a file.

cat sound.wav > /dev/audio

+Linux file system structure

+Linux common commands

nlsngrepncdntouchncatnhistorynexportnchmodnwhich

nfindnsshnpwdnpsnfreentopndfnkillnrm

ncpnmvnmkdirnmanntailnpingnsunfilenpwd

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Thank you!