Articles tagged with: korn shell
Shell Scripting for HPC Clusters, Part 2
This is the second installment of a multipart guide for beginner Unix sysadmins supporting HPC clusters. You can view the first part of the guide here.
Searching, Replacing, Comparing
Try to work with a large cluster and …
Use Perl inside Shell scripts
Perl is a far more powerful programming tool than any shell script. Sometimes you want to borrow some of that power without having to rewrite your entire shell script. There is an easy way to integrate Perl snippets inside your shell script.
Generating complex SQL queries with shell scripts
It is sometimes necessary to use complex select and insert queries with dozens of variables. Writing such queries by hand is a tedious process and the chance of making a mistake is high. A few …
Handling errors and trapping system calls
In the course of writing a shell script it is important to consider possible error and unexpected interrupts. Let’s say you wrote an interactive script that allows users to archive old files to free up …
Wget examples and scripts
Wget is a command-line Web browser for Unix and Windows. Wget can download Web pages and files; it can submit form data and follow links; it can mirror entire Web sites and make local copies. …
Using GNUPlot to chart MySQL data
The following Korn shell function connects to a MySQL database and extracts specified data, which is then plotted as a function of time using GNUPlot. Using correct syntax is critical. Note the use of single- …
Database operations with SQL and Korn shell
The following Korn shell function will read the a directory containing CSV data files named server_sysstat.20051119.csv with format:
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