Shell programming advanced 1.2 shell structure and execution

Create a shell script

mkdir Shell

Vim first.sh

#!/bin//tmp/"my home is $HOME""This is first Script"

Execute shell scripts, two methods

Bash first.sh

Mysql.sock Www_slow.log
2015-12-31.wangshaojun.root.history-timestamp Pear Www.sock
2016-01-01.wangshaojun.root.history-timestamp Www1.sock
My home Is/root
This is first script.

Or

SH first.sh

The second method of

chmod a+x first.sh

./first.sh

Absolute path

/root/shell/first.sh

Script Execution Process

Sh-x first.sh

+ ls/tmp
12334 Mysql.sock Www_slow.log
2015-12-31.wangshaojun.root.history-timestamp Pear Www.sock
2016-01-01.wangshaojun.root.history-timestamp Www1.sock
+ Echo ' My home is/root '
My home Is/root
+ Echo ' This is first script. '
This is first script.

Can troubleshoot errors

Shell programming advanced 1.2 shell structure and execution