A 、etc Place the configuration file under

B、/var Put the log file under

C、/root Super user home directory

D、/home User home directory

/bin  Binary execution file , That's the command file
/etc The configuration file is stored under
/dev When storing the external device files , Hard disk ,usb etc.
/lib It's a library file

There are many C The function of language , Also called filter :auk

csh: call C shell.
Tcsh yes csh Enhanced Edition , And fully compatible csh. It not only has csh All the functions of , It also has command line editing 、 Spelling correction 、 Programmable character set 、 History 、 Operation control And so on , as well as C The grammatical structure of language style .
AWK It's an excellent text processing tool , Linux And Unix One of the most powerful data processing engines available in the environment , AWK Provides extremely powerful functions : You can load styles 、 flow control 、 mathematics Operator 、 process Control statement Even built-in variables and functions .
SED: Stream EDitor

Directory in linux In what form does the file system exist ?

inux Everything is a document , No matter ordinary file or hardware device management

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