KDE Plasma + Brave on Debian

  This is the “how do I make Brave do what I want” note --- especially when Brave profile UI is broken and KDE is strict about .desktop launchers. 1) Know what you’re running. Check where Brave comes from. which brave-browser If it returns /usr/bin/brave-browser , you’re on the APT-installed build (good, predictable). Also note that on Debian you often have both commands available. brave-browser is commonly a wrapper. brave-browser-stable is commonly the actual binary. 2) Where Brave stores its data. Default Brave user-data root (APT install). ~/.config/BraveSoftware/Brave-Browser/ If you only see Default/ , then you effectively have a single Brave “profile” in that directory. 3) Multiple isolated Brave sessions without Brave profiles. This is the clean workaround: run separate user-data directories . Create a new isolated environment. mkdir -p ~/.config/BraveSoftware/Brave-RDT Launch Brave using that directory. brave-browser-stable --user-data-dir= ...
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Manipulating texts and lines: SORT, UNIQ, PASTE, JOIN, SPLIT

 SORT

Basically, alphabetical sorting.

$ sort <filename>
Sort the lines in the specified file, according to the characters at the beginning of each line

$ cat file1 file2 | sort
Combine the two files, then sort the lines and display the output on the terminal

$ sort -r <filename>
Sort the lines in reverse order

$ sort -k 3 <filename>
Sort the lines by the 3rd field on each line instead of the beginning


UNIQ

Remove the duplicates in the same line of a file

$ sort file1 file2 | uniq > file3
or
$ sort -u file1 file2 > file3

$ uniq -c filename
counts the numbers of duplicates


PASTE

$ paste -d ':' file1 file2
Merges the rows of file1 and file2 separating them with ":" instead of a TAB space.

-s
Outputs the data in horizontal rows instead of vertical.


JOIN

$ join file1 file2
Merges the rows of file1 and file2 overwriting the same fileds.


SPLIT

$ split file segment-file
Splits file1 into equal-sized segments named segment-filexx of 1000 lines each (default number). Where xx is the number related to each segment file.

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