tailieunhanh - Mastering unix shell scripting phần 3

i trong $ (tiếng vang $ STRING |. awk-F '{in $ 1, $ 2, $ 3, $ 4}') làm nếu 'INVALID_IP_ADDRESS' ((i 255)) sau đó INVALID = TRUE fi thực hiện trường hợp $ INVALID trong TRUE) in ; FALSE) 'VALID_IP_ADDRESS' in; esac; + ([0-1])) | 118 Chapter 5 if -s OUTFILE then echo nFull Filesystem s on THISHOST n cat OUTFILE print fi Listing shell script. continued The script in Listing is good and we have covered all of the bases right If you want to stop here you will be left with an incomplete picture of what we can accomplish. There are several more things to consider and of course there are many more ways to do any of these tasks and no one is correct. Let s consider mixing the filesystem percentage used and the MB of free filesystem space techniques. With a mechanism to auto-detect the way we select the usage the filesystem monitoring script could be a much more robust tool and a must-have tool where you have a mix of regular and large filesystems to monitor. Percentage Used MB Free and Large Filesystems Now we re talking Even if most of your filesystems are large file enabled or are just huge in size the small ones will still kill you in the end. For a combination of small and large filesystems we need a mix of both the percent used and MB of free space techniques. For this combination to work we need a way to auto-detect the correct usage which we still need to define. There are different combinations of these auto-detect techniques that can make the monitoring work differently. For the large filesystems we want to use the MB of free space and for regular filesystems we use the percentage method. We need to define a trigger that allows for this free space versus percentage monitoring transformation. The trigger value will vary by environment but this example uses 1GB as the transition point from percentage used to MB of free space. Of course the value should be more like 4-6GB but we need an example. We also need to consider how the EXCEPTIONS file is going to look. Options for the exceptions file are a combined file or two separate files one for percentage used and one for MB free. The obvious choice is one combined file. What are combined entries to look .

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