This was a tricky action. Assume I have a list of variables, obtained by an external source: var1=a var2=b var3=c I cannot use loop and in it the phrase ${var$i} (where i is the integer counter). It just doesn’t work. I used this instead to assign the values to an array: var[$i]=$(eval echo "${var${i}}") That…
Let’s assume we have a file containing lines such as this: first last one two three four five If we write a simple script to deal with each line in a turn, we would write something like this: for i in `cat file`; do echo $i; done This would echo, however, each word at its…
Nowadays, when LVM2 is common and is actually the default in installation of RedHat based distributions, using its snapshot capabilities can save lots of grief when files are deleted or when you need to revert to a day in the past – both for your files and for your MySQL DB. I have created a…
I always forget, and this blog is meant to help me remember. Found in Tar’s manual, are these simple directives: Have a file called file.tar, do: tar -xf file.tar full/path/without/trailing/slashes It can be a file or directory. You can have a list of files, such: tar -xf file.tar home/me home/you home/us/important-file Should do the trick.
Here’s a little script I’ve written which deletes older than AGE days files, and has an exclude list, just in case. It’s meant to be run by cron on a daily basis: #!/bin/sh # Source of all evil DIR=/ftp # Age of file in days AGE=10 # Exclude list – Use pipe (|) seperated values….
Here’s a little issue. If you were to replicate MS Exchange DB from one machine to another, how/what would you have done? The scenario goes as follows: You have your own domain, and you use, for your own core services AD and MS Exchange for the whole organization. While AD supports some built-in replication, so…
