VLC player is not part of standard openSUSE repositories, so we have to add additional repository for VLC and its tools:
$ sudo zypper ar http://download.videolan.org/pub/vlc/SuSE/Leap_15.0/ VLC
$ sudo zypper ar http://download.videolan.org/pub/vlc/SuSE/Leap_15.1/ VLC
Aegisub subtitles editor is not part of default repositories in openSUSE, so you have to visit https://software.opensuse.org/ to find it.
It's very simple, you just go https://software.opensuse.org/ , first choose your version of openSUSE distro, and in searchbox type "aegisub" and then click "search":
Listing files is done with ls command. We just have to choose correct parameters to show what we need.
In order to list files with extensions we run
$ ls -m
To count number of folders/directories/files in folder/directory is possible using wc command with a parameter -l. But we have to be sure, that we are counting only folders, so let's filter only folder using ls command, and then count then.
My example:
$ pwd
/home/dima/
Then let's take a look, which files and folders we have:
Linux command line is very powerful tool even for string and character operations without installing any third-party applications.
To count number of characters in some file, containing text, you can use wc command with -m parameter using following scheme:
$ wc -m <file_name>
Examples:
$ wc -m nata-ubuntu-settings
21 nata-ubuntu-settings
$ wc -m it-slang-v-rustine
1019 it-slang-v-rustine
$ wc -m rongta-files-installation
389 rongta-files-installation
While installing some program or package or library on your system, you can meet an error:
locate: can not stat () `/var/lib/mlocate/mlocate.db': No such file or directory
