2021-1-28 Linux Learning Minutes

linux directory structure:

/bin stores frequently used commands.
/sbin stores the system management program used by system administrators.
/home stores the home directory of ordinary users. In linux, each user has its own directory
/root super user's home directory
/boot Store Linux boot core files, including some connection files and mirror files

Analysis of the reasons why xshell cannot connect to the Linux virtual machine:
1. It may be that the firewall is not turned off.
2. Set the network of the virtual machine to net mode.
3. Modify the ip of the real Windows machine.
4. If the virtual machine and the real machine can ping each other normally Can connect

xshell and xftp can be used in tandem, but MobaXterm seems to be more powerful.
Xshell and xfpt are generally in Chinese, which is easy to use and easy to understand. MobaXterm is all in English, which is conducive to the improvement of English.

Sftp on the left side of MobaXterm has file upload and download functions, which can completely replace xshell and xftp. vim is an enhanced version of vi

After creating a file with vim, practice the shortcut keys for copying and pasting where the cursor stays. For example, if you paste 5 lines down, yy->5dd deletes the same.

Find the word you want to find in the command line inside the edited document, type /XXX and press Enter to find the keyword you want to find

Move the cursor quickly: if the cursor is on the first line, enter G in normal mode, and the cursor will move directly to the end.
Enter gg and return to the first line directly. If you don’t want a lot of input, enter u in normal mode and cancel directly

Shutdown & restart command
shutdown
shutdown -h now shutdown immediately
shutdown -h 1 shutdown after 1 minute
shutdown -r now restart
halt immediately shutdown
reboot restart
sync sync the memory data to the disk

User Management
Add user useradd username (wyg) Use this user cd /home