First, the concept of Shell script
command · to be performed in order to save a text file
· executable permissions to the file, you can run
· Shell can be combined with various control statements to perform more complex operations
two, Shell scripting scenarios
· repetitive operations
· batch transaction processing
automated operation and maintenance
· service status monitoring
· regular tasks to perform
three constitute Shell script
1, script statement
2, annotations
2, executable statement
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if (judgment statement) of the shell
Shell Script Example:
[Root @ localhost ~] # vim liu.sh // shell scripts are generally easy to identify for the .sh
#! / Bin / bash // declare the resolver
<< EOF CAT
is available for purchase to Our Website!
EOF
the Read -p "Please enter the correct user name:" the User
IF [$ the User = "Liuxiang"]; the then
echo "user enters the correct"
the Read -p "Enter Password:" password
IF [$ password = "lcx123"]; the then
echo "login is successful, please collect your reward!"
the else
echo "login failed":
fi
the else
echo "invalid user"
fi
[Root @ localhost ~] #chmod + x liu.sh // add permissions to files Shell
[root @ localhost ~] # bash liu.sh // Run Shell Script
Welcome to our website!
Please enter the correct user name: liuxiang
user enters the correct
Please enter a user password: lcx123
successful login, please collect your reward!
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