While using associative arrays, I run into this little issue using this sample KSH93 code: #!/bin/ksh93u+ function scmp {         typeset -A IPAA;         # Load First File.         for KEY in $(cat 1.rip); do                 IPA1[KEY]=1;         done         # Load Second File.         for KEY in $(cat 2.rip); do                 IPA2[KEY]=1;         done […]

When assigning values to an associative array in KSH, it's important to note the significance of the $ value:   # typeset -A ABCD; $(( ABCD[“moi”]=0 )); $(( ABCD[“moi”]++ )); $(( ABCD[“moi”]++ )); $(( ABCD[“moi”]++ )); print ${ABCD[“moi”]}; /bin/ksh93u+: 0: not found [No such file or directory] /bin/ksh93u+: 0: not found [No such file or […]

Here's are an example of a random number generator in KSH or it's newer counterpart KSH93.  For this post, we'll use the latest KSH from AT&T Labs: Generate a random set of integers between 0 – 256 and use them to create a random set of IP type entries: #!/bin/ksh93u+ for (( KEY=0; KEY < […]

There's several ways to determine the ksh version.  All will print different results depending on the KSH you're running.  Here are the methods for finding the versions:

DD-WRT run what's known as a busybox, which is a single tiny executable designed to run on enbedded devices.  busybox provides common UNIX utilities normally found on larger UNIX / Linux installations such as desktop computers.  Unfortunately it's limited and even with the shell it provides, alot of functionality such as common shell loops no […]

This is a quick and dirty AWK tutorial demonstrating the most common usages and features that one can use on a daily basis by human beings.  Three variants: AWK standalone, integrated into ksh, and one-liner are provided.    On my system, AWK pointed to GAWK.  GAWK has an expanded command set but here we will […]

One of the things you definitely want to take a backup of on a regular basis, especially if you are a WebAdmin/WebMaster is that of your MySQL database for things such as a forum, blog or anything else you have that may use MySQL on your site. For this you'll need telnet/ssh login to allow […]

Was interested tonight how well Java (A language I know) is doing against other languages such as C# (One that I don't know). I'm also something of a Bash/Ksh and Perl buff so I was also interested in popularity indexes as well. I remembered earlier a site I had used to check for this.  I […]