You can use the logger tool. The simple command to log is
logger My syslog message from console.
Tag: Linux
Sometimes you may find lot of characters trncated due to 80×25 tty size by default. Especially when you want to open some log files. Below command will help to set the row and column size.
stty cols 132 rows 34
will set the column width to 132 and rows 34.
Screen command benefits
- Can be used to launch multiple shells from a single SSH session.
- Detach and re-attach from multiple ssh session.
- Running process which can take more time and need session to be kept alive.
- To keep the session alive without any network disruptions.
The command to create a screen session is
screen -t <screen name> -S <socket file name>
To detach a screen session
ctrl+a + d
To list the screen sessions
screen -ls
To reattach the screen session
screen -r <pid from list>
The file /etc/SuSE-release contains the SuSE version and patch level.
This file is deprecated now and you can use /etc/os-release to find the details
Udev in linux subsystem helps to write scripts to do a specific action when a new device is added or an existing device is removed from the system.
The following article helps you to write your own basic script by identifying a device and adding the specific udev rules. Refer An introduction to Udev: The Linux subsystem for managing device events for more details.
The Linux® system call interface permits user-space applications to invoke functionality in the kernel, but what about invoking user-space applications from the kernel? Explore the usermode-helper API, and learn how to invoke user-space applications and manipulate their output. Read more…
Linux documentation on long delays, short delays and timeouts. This also describes the api’s used to achieve the same and also the advantages, disadvantages and also the situation in which each better suits. Some informations in the documentation can be out dated based on latest code. Read More…