How to use the CD directly in Linux to enter the directory where which return values

Linux command required

1.Linux the output of one command as a parameter to another command: ' (the point on the left of the keyboard, the note is different from the quotation mark) or $ ()

2. Extract the directory of files in the directory beyond the command: dirname

Second, to achieve the direct use of CD access to the which obtained the Android ADB file directory method

Method 1:cd ' DirName $ (which adb) '

Method 2:CD $ (dirname $ (which adb))

Third, return to the original directory

Method 1:CD-

Method 2:CD $OLDPWD

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