If you are not familiar with systemd you may be surprised about new service listening on network socket – systemd-timesyncd. It’s a time sync service started after Debian update (to stretch). Continue Reading
This short article describe how to reset lost root password on Linux system. IMPORTANT: This method require physical access to the machine.
On GRUB screen select normal boot option:
Search for the line starting with “linux /boot/vmlinuz…” or similar depending of Linux distribution. This is the place where kernel and rootfs is selected. Change ‘ro’ option to ‘rw’ and add: Continue Reading
Bash has ability of simple string manipulation. It has a various operators which allow do some basic text operations. This short article shows how to use these features in action with Bash.
Let’s say we have a variable text:
$ text="This is a sample text."
The Awk tool has a several build-in variables which allow to navigate through a fields of processing text. One of them is a NF. A value of this variable is a number of fields in a current line. This simple example shows how useful is this variable when we don’t know how much columns has the input file.
This is a contents of our testing text file:
$ cat ./file.txt abc def ghi 123 456 789 jkl mno 321 654