- books 1
- chage 1
- date 1
- ethtool 1
- less 1
- more 1
- oneliner 1
- password 1
- perl 1
- permission 1
- rpm 1
- sed 1
- unzip 1
- zip 1
books
Linux Administration Books for Free
A short post to list some free books for Linux users and administrators, take a look you might find one that you would like to have.
chage
Force user to change password
User is calling and say that he forgot is password. So you need to change his password and for security reason you want to force him to change it upon his first login. The command “chage -d 0” (change aging) will force user to change his password upon first login.
date
Making Date Calculation
You’re doing a script and you need to know what was the date 35 days ago or what will the date be in 21 days. This is where the “date” command can help you doing that kind of calculation. In this little article we will present some examples to help us making some data calculation. I would like to point out, that all of these date calculation take in consideration the leap year.
ethtool
Identify physical network port name
The ‘ethtool’ is a command line utility used to query and control network device driver and hardware settings, particularly for wired Ethernet devices. In our example, we will use it to flash the light on the back of a card, this will be useful to identify the device name that belong to what port on the back of you Linux computer.
less
Doing more with less
We usually use the “less” command to browse the content of a text file. We use the [Page-Up], [Page-Down], [Down-Arrow], [Up-Arrow] keys to move within the file, but did you know that you can do more with the less command ?
more
Doing more with less
We usually use the “less” command to browse the content of a text file. We use the [Page-Up], [Page-Down], [Down-Arrow], [Up-Arrow] keys to move within the file, but did you know that you can do more with the less command ?
oneliner
Search and replace multiple files
At one point, you may be facing a situation where you would want to do an in place replacement of one string by another in multiple files. In this article, we will demonstrate a couple a way to do it, one solution using ‘perl’ and a second using ‘sed’.
password
Force user to change password
User is calling and say that he forgot is password. So you need to change his password and for security reason you want to force him to change it upon his first login. The command “chage -d 0” (change aging) will force user to change his password upon first login.
perl
Search and replace multiple files
At one point, you may be facing a situation where you would want to do an in place replacement of one string by another in multiple files. In this article, we will demonstrate a couple a way to do it, one solution using ‘perl’ and a second using ‘sed’.
permission
Resetting file permission with rpm
Did you know that you can reset file permission to what they were when you installed the package. This may become helpful if somebody made a mistake and change the permission on a number of files (This never happen right).
rpm
Resetting file permission with rpm
Did you know that you can reset file permission to what they were when you installed the package. This may become helpful if somebody made a mistake and change the permission on a number of files (This never happen right).
sed
Search and replace multiple files
At one point, you may be facing a situation where you would want to do an in place replacement of one string by another in multiple files. In this article, we will demonstrate a couple a way to do it, one solution using ‘perl’ and a second using ‘sed’.
unzip
Doing more with less
We usually use the “less” command to browse the content of a text file. We use the [Page-Up], [Page-Down], [Down-Arrow], [Up-Arrow] keys to move within the file, but did you know that you can do more with the less command ?
zip
Doing more with less
We usually use the “less” command to browse the content of a text file. We use the [Page-Up], [Page-Down], [Down-Arrow], [Up-Arrow] keys to move within the file, but did you know that you can do more with the less command ?