What good resources exist for an inexperienced user to explain how to safely upgrade Ubuntu Mate to 18.10 from 18.04?
How do I upgrade to a newer version of Ubuntu?
How to Backup and Restore Android OS without Rooting Case-insensitive string comparison in C++ Why does instanceof return false for some literals? &quot;foo&quot; instanceof String //=&gt; false &quot;foo&quot; instanceof Object //=&gt; false  true instanceof Boolean //=&gt; false true instanceof Object //=&gt; false false instanceof Boolean //=&gt; false false instanceof Object //=&gt; false  12.21 instanceof Number //=&gt; false /foo/ instanceof RegExp //=&gt; true  // the tests against Object really don't make sense  Array literals and Object literals match... [0,1] instanceof Array //=&gt; true {0:1} instanceof Object //=&gt; true  Why don't all of them? Or, why don't they all not? And, what are they an instance of, then? It's the same in FF3, IE7, Opera, and Chrome. So, at least it's consistent. Defer Parsing of Scripts this is my first time to try this "Defer Parsing" thing, and I don't really have an idea how to do it.    Using PageSpeed tool, I found out that one of the reason why my page is loading too slow (currently 92/100) are the scripts. And the PageSpeed suggested that I need to Defer Parsing all those scripts.  Is there anyone that can help me with this. Thanks. What is the purpose of a serial number? Set an alias on Bourne shell I am using a scrtipt with instruction 'SH -c command', where command is an alias from bash, this alias can not be interpreted into Bourne shell. ¿Do you have any idea for set this alias into Bourne shell and getting that it works in the new shell? Thanks everyone ! What is the best way to convert seconds into (Hour:Minutes:Seconds:Milliseconds) time? Logic gate - What will be the second input of each gate? Full:    Cropped   :    In the second image (cropped) which is the same as the first (full) image... why the 1st Gate outputs "0"? Can truesight see through a druid's Wild Shape? The rules for truesight state:     A creature with truesight can (..) perceive the original form of a shapechanger or a creature that is transformed by magic   A druid player argued that since the druid is still a "humanoid" (not a "shapechanger"), and since , a creature with truesight should not see through it.  As the DM, I ruled against it because I believed the intent of truesight is to see through all kinds of shapechanging effects but I was still left wondering if I missed anything. I couldn't find anything about this in the errata either.  So, going by strict RAW, should a creature with truesight be able to see the druid's true form while a druid is using wild shape? Why is defragmentation unnecessary? Why is defragmenting unnecessary in Ubuntu? I need to run a bash script at boot-time as superuser in Xubuntu. I don't know where to start. I have to do something described in a Arch Linux guide. That guide says exactly:     Add following at the end of the file : /etc/rc.sysinit   # Do my action /etc/rc.d/do_my_action  /bin/dmesg &gt;| /var/log/dmesg.log   But I do not have /etc/rc.sysinit and /etc/rc.d/ in Xubuntu. I'm sure there are equivalent ones, right? Do we know anything about Aragorn's first time in Moria? When the Company is forced to abandon their attempt to cross the Misty Mountains via the Redhorn Gate (the pass of Caradhras), Gandalf proposes they go "neither over the mountains, nor round them, but under them," via Moria. During the debate Aragorn remarks:     "I too once passed the Dirmrill Gate but though I also came out again, the memory is very evil. I do not wish to enter Moria a second time."    I haven't read much beyond the LOTR trilogy other than The Silmarillion. Does Tolkien ever describe Aragorn's first visit to Moria anywhere? How to verify $H\otimes K \cong \bigoplus\limits_{i\in I}H$ Let $H,~K$ be the Hilbert space. if $\{v_{j}\}_{j\in J}\subset H$ and $\{w_{i}\}_{i\in I}\subset K$ are the orthonormal bases, then how to construct the isomorphic mapping: $H\otimes K \rightarrow \bigoplus\limits_{i\in I}H$. Here, the $H \otimes K$ is the tensor product of two Hilbert space. I know there is a way to view all my questions in reverse chronological order from the PC by going to my profile. But I would like to do the same from the mobile app for Android. On Android in the left upper hand corner I can only see the latest answers to my posts, but I would be able to view all my posts. PDE separation of variables Hi could someone guide me this problem  It says ,  $ u_t - u_{xx}-2 u_x=0  $  Use the method of separation of variables to find all possible solutions.   Could someone help me out for this problem. I'm beginner at PDE. I would be much appreciated if you able to show some partial work so that I can understand.  Thanks in advance for taking my consideration Are there any good tools besides SeleniumRC that can fetch webpages including content post-painted by JavaScript? How are the AES S-Boxes calculated? How to filter a list by hour Why Oracle discontinued Oracle Java (JDK) Installer PPA? How can I return NULL from a generic method in C#?