Recent content by 2rArne

Answer: The answer is.... perhaps more than once ;) So - when does it run? Normally * represents all values in the range (for minutes, the range is 00-60). And the /<number> was how much to skip within this interval. As such, the syntax says run each minute, starting at 00 and then skip the...

I forgot to use -q with grep, in the curly brackets example :) Explanation: 'grep -q' - is a quiet grep and will only tell you if it found the expression or not. Based on the return code from grep I either cut the 17th or the 16th character out from the output of 'head -1 filename.ext' ----...

x will return either 16 or 17 17 if the 16'th character of the first line in file filename.ext is uppercase (range of A-Z), otherwise it will return 16 head -1 filename.ext |cut -c16 |grep [A-Z] && { # 16th character is in range A-Z head -1 filename.ext |cut -c17 } || { # 16th character...

Just some comments... p5wizard have given a good solution which importantly enough is portable. Some unices (especially Linux variants) might support syntax that include /<number> where ``/<number>'' specifies skips of the number's value through the range. # Min Hour DayOfMonth Month...

It depends what you mean about "Remove root password" If you have problems getting into the server because of a lost root password - and do not have any other ways to gain root access (example via ssh key authentication from a trusted server) aso. you have a more difficult task ahead. *** Most...

Escaping or quoting is one of the basic methods for handling special characters in unix. Also note that spaces can be a challenge, and might also impose a risk since a parameter/name can accidentally be mistreated as several individual parameters. Example: Filename with spaces -rw-r--r-- 1...