How to deal with the occurrence of special characters in the linux command that cannot pass parameters

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Command line special character processing method

The special symbols in the linux command include: *,\, $, [,], +, -, &,%, #,!, ~, `, spaces, etc., which have a special meaning. You should pay attention to the use of these symbols on the command line, otherwise you will report an error.

For example, I have a directory here: the name of the directory has a space in the middle (aa bb is a directory, not two, but with a space in the middle):

When we want to delete him, we will report an error if we delete him directly. Rm will think that there are two directories:

Method 1: draw him up as follows

Method 2: escape\:

The same is true of other commands:

The above is just a simple example. All linux commands can deal with special characters in this way. I think it is easier to use quotation marks:

The following is a problem encountered by a group member on the QQ group in our lecture hall: the perl script has many parameters, and there are many special characters in the parameter values, so that linux can not distinguish which is the parameter name and which is the parameter value, which leads to an error:

The solution is to quote the entire parameter value (all the contents of the red box are caused), rather than simply introducing the pacid:

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