Wildcards and special characters in shell

Shell wildcards and special characters 1. Wildcards are also very useful in the bash operating environment, that is, wildcards (wildcard )! We can use bash to process data more conveniently! Below we will list some common wildcard characters. Example: [html] (1) locate the file name starting with cron under/etc: # ll-d/etc/cron * <= add-d to only display the directory (2) Find the file name with the "exactly five letters" under/etc: # ll-d/etc /????? <= Because? There must be one, so five? Right (3) find the names of all numbers in the file name under/etc: # ll-d/etc/* [0-9] * <= remember that the left and right sides of the brackets need to * (4) Find the/etc/bottom, file names starting with non-lowercase letters: # ll-d/etc/[^ a-z] * <= note that there is no * <span style = "font-size: 18px on the left of the brackets; "> <strong> </span> 2. what are the alias special symbols in the bash environment besides the special symbol wildcard? Next we will summarize the information: