Advice for everyday Unix systems administration and some clever ways to approach more challenging problems.
If you couldn't use the chmod command because it had somehow lost execute permission, what would you do to fix the problem? The many ways that you could go about restoring execute permissions to chmod might just give you some new insights into ....
Takes a look at the kind of information that might be stored in digital photos (possibly including your location) and shows how to use the exiftool to edit or remove it.
A different way to loop line-by-line in a bash script
The curl command is a versatile tool for working with web sites and web applications.
Pulling together stats to give you a better idea what a directory or file system contains
Questions sysadmins should ask and precautions they should take when troubleshooting
An introduction to automating processes built to be interactive -- using the expect command
Using awk to perform simple numerical calculations is easier than you might imagine.
Unusual things you can do with the vim editor
Identifying and generating prime numbers on Unix is easier than you might imagine
Using find commands to display important file system statistics
Using the join command to avoid quoting arguments
There are only two times when you need to dig through piles of data to get your job done: When you know what you're looking for and when you don't. Here are the best tools and techniques for both situations.
Listing group members on Unix systems, including commands and a helpful script
There's more than one kind of swap file -- this kind is is created by your system to help ensure that you don't lose important file content when something goes wrong.
If you're a bash user, you can also use your history file to record the date and time when you used each command. You simply have to specify a format for your command time display using a special variable.
If you'd like your search terms to be more visible when you use the grep command, you can use an alias like this. It will put the term that you're looking for in a different color so that you can spot it more easily on each line of text. He....
If you work with file archives that come in many different "flavors", you might find this little trick to be a handy one.
Making use of HTTP status codes to make everyday life run more smoothly
One way to restrict what users can do on your Linux systems is by using rbash -- the restricted Bourne Again shell -- but only if you take some additional steps to ensure that your users can't break out of their cells
The Unix command line provides numerous ways to make our work easier. Here are 15 "tricks" that I use often to make quick work of various tasks.
I've heard that those who can't remember history are condemned to repeat it but for Unix users, repeating history is not only advantageous, it's something of a skill.
Sometimes, the simplest command line challenges can leave you leaning over your keyboard with that "What just happened?" look on your face. There's (almost) always a good explanation, but it might take a little head scratching before ....
Unix errors often seem cryptic and sometimes even obtuse, but they're actually well designed and useful. A little insight into the whys and hows of common error messages might help you appreciate not just error messages, but why you're bum....
Breaking out of the traditional owner/group/world way of managing file permissions, setfacl and getfacl provide a lot of flexibility and fair share of complexity.
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