First, install the gcc compiler
View the current version of GCC command gcc -v
[root@localhost /]# gcc -v
Reading specs from /usr/i386-glibc-2.1-linux/lib/gcc-lib/i386-glibc21-linux/egcs-2.91.66/specs
gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)
When a problem arises:
Command 'gcc' not found, but can be installed with:
sudo apt install gcc
Solution: sudo apt install gcc installed gcc compiler
Two, gcc compiler
Problems encountered when creating a new file to save the file vi: E212: Can not open file for writing
Create a new file with vi, hello.c or hello, then: wq to save quit, can not quit, has prompted the emergence of this
Meaning can not be saved.
The reason is that authority is not enough, ordinary users can not be saved with vi, you may need superuser
Command: sudo su converted into superuser
vi hello open file: wq to save and exit
Three, firefox download
If other download tool, it is best to see the configuration file, usually in a hidden directory / home / username / inside the tool or new download.