Embedded common sense

1ANSI C is a standard that the American National Standards Institute has developed for a C language standard ~
2 pm Use LMV to manage the disk system to make it easy to dynamically adjust the size of each partition.
3/opt directory: This is the directory for the host to install additional software.
4 almost all Linux distribution suites offer a great tool samba--it makes it easy to share files. Don't have to put the same data in different places
5linux [[email protected] root] #第一, two root what is the meaning of each? [[Email protected] ~]# What does that mean?

The first root indicates the user's second localhost represents the host name, the third root represents the current directory, and the fourth # represents the permission

~ Represents the root user's home directory, usually/root/
Ask
[[Email protected] zying]$ What does this mean? What does $ mean?
Reply
$ indicates that the normal user username is zying in the Zying directory, specifically can use PWD to see the specific path
6 Note the current location when deleting with the RM command.
The difference and connection between 7-c and-O
Gcc-c A.C compiled into a target file a.o
Gcc-o a a.o generating execution files A.exe
GCC a.c generate execution file a.exe
Gcc-o a-c A.C compiled into target file a
Gcc-o a A.C generating execution files A.exe
After referencing a function in A.C test.c: gcc-c test.c compiled into the target file TEST.O gcc-c A.C compiled into the target file a.o
Gcc-o a TEST.O a.o generate execution file a.exe
Gcc-o a TEST.O a.c generate execution file a.exe
Gcc-o a test.c a.c generate execution file a.exe
Gcc-o a TEST.O a.c generate execution file a.exe
Summary: As long as the parameter has the-C, always generate the target file;
The execution file is always generated as long as there is no-C in the parameter and only-O.
8 Single-Work communications: Pagers can only accept information
Half-duplex communication: Walkie-Talkie can both send messages and receive, but not simultaneously
Full-duplex communication: Both sides of the phone can send messages or receive messages at the same time
9 Vim operation
/Find the same word.

Embedded common sense