英文文本新增

As a final step, after testing and debugging, you would likely want to move it to /usr/local/bin (as root, of course), to make the script available to yourself and all other users as a systemwide executable. The script could then be invoked by simply typing scriptname [ENTER] from the command-line.
中文翻譯新增

As a final step, after testing and debugging, you would likely want to move it to /usr/local/bin (as root, of course), to make the script available to yourself and all other users as a systemwide executable. 

>`經過測試與除錯後，最後一步我們通常都會想將腳本搬到 /usr/local/bin 目錄下 (當然，以root身份來執行)，讓系統上所有使用者都能使用這個腳本。`
Merge pull request #14 from colorbook/master

中文翻譯新增
中文翻譯新增

System administrators often write scripts to automate common tasks. Give several instances where such scripts would be useful.
>`系統管理員經常會編寫腳本用作自動處理日常事物。在此提出幾個有用的腳本作為範例說明。`
中文翻譯新增

The script could then be invoked by simply typing scriptname [ENTER] from the command-line.

>`接著我們只要打腳本名稱，就可直接執行了。`
Merge pull request #17 from Rslw/patch-7

中文翻譯新增
中文翻譯新增

Write a script that upon invocation shows the time and date, lists all logged-in users, and gives the system uptime. The script then saves this information to a logfile.

>`透過所撰寫的腳本顯示時間、時期、列出所有登入使用者以及系統的運行時間，結束以後腳本會將這些資訊作為系統運行日誌儲存下來。`
Merge pull request #18 from Rslw/patch-8

中文翻譯新增
英文文本新增

As a final step, after testing and debugging, you would likely want to move it to /usr/local/bin (as root, of course), to make the script available to yourself and all other users as a systemwide executable. The script could then be invoked by simply typing scriptname [ENTER] from the command-line.

Notes

[1]	
Caution: invoking a Bash script by sh scriptname turns off Bash-specific extensions, and the script may therefore fail to execute.

[2]	
A script needs read, as well as execute permission for it to run, since the shell needs to be able to read it.

[3]	
Why not simply invoke the script with scriptname? If the directory you are in ($PWD) is where scriptname is located, why doesn't this work? This fails because, for security reasons, the current directory (./) is not by default included in a user's $PATH. It is therefore necessary to explicitly invoke the script in the current directory with a ./scriptname.
中文翻譯修正

The script could then be invoked by simply typing scriptname [ENTER] from the command-line.

>`接著我們只要打腳本名稱[按下ENTER]，就可直接執行了。`
中文翻譯新增

Caution: invoking a Bash script by sh scriptname turns off Bash-specific extensions, and the script may therefore fail to execute.

>`注意：使用 sh scriptname 來執行腳本，可能會導致 Bash 相關的 extensions 無法使用，腳本也就因此執行失敗。`
版面排版修正
Rename ch16.rst to ch16.md
中文翻譯新增