If then else in bash is not very difficult. However, there is something that can cause problems:Please note the spacing inside the brackets! It won't work without! string comparison
simple example:



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iotop is a nice tool to monitor I/O usage information output by the Linux kernel (requires 2.6.20 or later). To install iotop with yum as root (for RedHat / Fedora / Centos based systems only)&nb [ ... ]