In other words, if the first command runs successfully, the second command runs.

换句话说，如果第一个命令运行成功，则第二个命令将运行。

youdao

In other words, if the first command is successful, the second command does not run.

换句话说，如果第一个命令成功，则第二个命令不会运行。

youdao

The stdout of the first command is not written to a file and then read by the second command.

第一个命令的stdout没有写到一个文件中，然后再由第二个命令读取。

youdao

The Duke of Gloucester, who is the second in command of the Order of St John after the Queen, is to lead a ceremony to mark the occasion.

BBC: The Duke of Gloucester

The second in command from Homeland Security, the Justice Department, the FBI, NCTC and the office of the director of national intelligence sat at the small conference table.

WSJ: U.S. Terrorism Agency to Tap a Vast Database of Citizens

So how was it that he became adjutant, the second in command of a secret army, asked Mr Clarke?

BBC: NEWS | UK | Northern Ireland | Eyewitness: MP's 'code of honour'