指令 (zhǐlìng) means "instruction," "command," or "directive." It is used in both technical contexts (such as computer commands) and general contexts (such as orders or directives from authority).
电脑收到指令后会立刻执行操作。
Diànnǎo shōu dào zhǐlìng hòu huì lìkè zhíxíng cāozuò.
The computer will immediately execute the operation after receiving the command.
士兵们必须服从上级的指令。
Shìbīngmen bìxū fúcóng shàngjí de zhǐlìng.
Soldiers must obey the commands of their superiors.
你只需要输入一条简单的指令就行了。
Nǐ zhǐ xūyào shūrù yī tiáo jiǎndān de zhǐlìng jiù xíng le.
You just need to enter a simple command and that's it.