Shell script之How to write

標籤：

Write shell script:

　1)　　Editor like vi or mcedi

 

　2)　　Set execute permission for your script

 

　　　　　chmod  permission  your-script-name

$ chmod +x your-script-name$ chmod 755 your-script-name

　　This will set read write execute(7) permission for owner, for group and other permission is read and execute only(5).

　

　　3)　　　Execute script

　　　　　　bash your-script-name
　　　　　　sh your-script-name
　　　　　　./your-script-name

 

　　In the last syntax ./ means current directory, But only . (dot) means execute given command file in current shell without starting the new copy of shell.

Example:

$ . foo

 

　　4)　　Practice

1 $ vi first2 #3 # My first shell script4 #5 clear6 echo "Knowledge is Power"

 1 $ vi ginfo 2 # 3 # 4 # Script to print user information who currently login , current date & time 5 # 6 clear 7 echo "Hello $USER" 8 echo "Today is \c ";date 9 echo "Number of user login : \c" ; who | wc -l10 echo "Calendar"11 cal12 exit 0

 

Shell script之How to write