How to create a text menu in the Linux system

When using Linux systems, the most common shell script interactions is the application menu (text menu), the core of the text menu is the case command. H. L. Use the CASE command to complete the menu interaction. Let's create a simple script below. Run the text menu in the Linux system. Let's take a look at the menu effect: Script content: [Root @ localhost ~] # cat menutext.sh #! / BIN / BASH Function menu { Clear Echo -e "\ t \ t \ TDisplay computer info menu \ n" Echo -e "\ T1. Display Disk Space" Echo -e "\ t2. Display memory usage" Echo -e "\ t0. EXIT Program \ n \ n" Echo -en "\ T \ TENTER Option:" Read -n 1 Option } Function diskinfo { Clear DF -K } Function meminfo { Clear CAT / proc / memoryfo } While [1] DO Menu Case $ OPTION IN 0) Break ;; 1) Diskinfo ;; 2) Meminfo ;; *) Clear Echo "Sorry, Wrong Selection" ;; ESAC Read -n 1 line DONE Clear The menu display is implemented through the Echo statement, and the method of use the echo command is used to see the previous article "One of the most common commands in the Linux system." The menu content is implemented by a custom function, and the call is implemented by CASE. Get input information, implement it through the read command, -n 1 Limit only one character is read, and the user only needs to enter a number, and the call can be achieved without pressing Enter. Read more

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