https://jeltsch.org/en/tags/bzip2/Recent content in Bzip2 on Michael’s DomainHugoen-usCopyright © 2002 - 2026 Michael Jeltsch.Fri, 24 Jul 2026 00:18:18 +0300https://jeltsch.org/en/the_sticky_bit_bzip2_and_automatic_start_of_programs_upon_login/Sat, 26 May 2007 00:00:00 +0000https://jeltsch.org/en/the_sticky_bit_bzip2_and_automatic_start_of_programs_upon_login/<p><strong>The sticky bit</strong>I am still wondering what exactly the &ldquo;stick bit&rdquo; in the file permissions is doing. My suspicion is that if the sticky bit is set for a directory in the group field (chmod g+s foldername) that the permissions are inherited (that is all newly created files in that folder and below will have the same permissions as their parents. But maybe I am wrong as there is still the weird &ldquo;umask&rdquo; command that influences permissions of newly created files. I have to figure out how to automatically set the permissions of a specific directory (which is going to be shared among different users to g+rw.<strong>bzip2 and bunzip2</strong>To uncompress a bzip2 file, execute the following command:<code>bunzip2 filename.txt.bz2</code> (where filename.txt.bz2 is the name of the file you wish to uncompress). The result of this operation is a file called filename.txt. By default, bunzip2 will delete the filename.txt.bz2 file.<strong>Automatic start of programs upon login</strong>To start up automatically a program upon login, e.g. gaim, I just added the following line to the end of my .bash_profile: &ldquo;gaim &amp;&rdquo;. I don&rsquo;t know whether it&rsquo;s a good way to implement it like this but it works. I then did the mistake to start the vncserver with this method. What happend was, that upon logging in, the vncserver started up. And of course .bash_profile got executed within the first xdisplay of the vncserver (which happens in case of Red Hat 9 to start up KDE as window manager). So from within this session another instance of vncserver was started. this repeated itself until I had about 80 vncservers running on my machine and the speed slowed down dramatically.</p>https://jeltsch.org/en/self_extracting_compressed_files/Fri, 25 May 2007 00:00:00 +0000https://jeltsch.org/en/self_extracting_compressed_files/<p>Today I created a self-extracting, compressed file from a pdf document (disclosure.pdf). First I compressed the pdf file:</p> <div class="codeblock syntax-highlight mb-3"><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">bzip2 disclosure.pdf</span></span></code></pre></div></div><p>Then I create a text file (header.txt) with the following content:</p>