Recently, I came into contact with the software Xshell. Using this software, we can connect to the Linux system. After entering, we may be smeared. The editor will take you to learn some common shell commands.
First of all, we have to start with the simplest chat with you. After we enter the Xshell interface, we connect to the Linux server. When we first entered, we didn't know which files we had. At this time, we can use the ls command to display which files are there. Or use ls -l, the easiest is ll. The ls command will display the file horizontally, which is uncomfortable to look at. ll and ls -l have the same effect. It is recommended to use ll because it is the easiest.
After we already know what the files are, we need to know how to enter the file we want to enter. In a graphical system such as windows, we can use double-click to open the file we need to open. In Xshell, we need to use: The cd command, after we enter, the following pages are displayed. At this time, the default is under the root node root:
If what we need to enter now is the local file of the usr file, we need to use: cd /usr/local, to enter, at this time, we will show that we have entered the local file. It should be noted that entering in the root root directory For other files, you need to add a slash "/" at the top, and you can enter directly without adding it in any other two-level or even multi-level directory.
If there is entry, there will also be return. When we need to return, we need to use the command: cd ../. Similarly, we can also add the parent file directory we need to enter after ../ to enter directly.
The next step is how to edit and view files. If there is a host.xml file in the local directory, we need to edit or view it. The command to view is cat host.xml; the command to edit is vi host.xml, then press i to enter the modification mode, or just watch, if we suddenly do not want to modify, press ESC and write in the command line :q! Then press Enter to contact editing. If we need to save after editing, we also need to press ESC, then enter :wq and press Enter.
To sum up: Edit the file vi, press i to edit, save and end editing ESC :wq Enter, do not save and end editing ESC :q! Enter
To execute the file under the Linux system, we need to use ./filename.sh. If we need to execute the host.sh file, we need to enter the directory where the file is located and execute it.
The above command may run the problem of insufficient permissions. Finally, I will tell you an authorization command. If we want to authorize all .sh files under this file, we can write: chmod u+x *.sh to the sh file Authorization, of course, we can also replace * with a specific file name, depending on the needs:
