Am trying to traceroute to google.com but unfortunately this is the output I am getting -    I know that these * * *s mean that the packets are not reaching back, perhaps due to firewalls, but no matter which website I am trying to traceroute, I am getting the same output, even our internal website. Any suggestions?
If I traceroute to my server via a bunch of different methods, the external ip seems to not work. However the server is online and accessible by this ip.  Localhost:  michaelxu@michaelxu-server:~$ traceroute 127.0.0.1 traceroute to 127.0.0.1 (127.0.0.1), 30 hops max, 60 byte packets  1  localhost.localdomain (127.0.0.1)  0.120 ms  0.069 ms  0.064 ms   Internal Ip:  michaelxu@michaelxu-server:~$ traceroute 192.168.1.3 traceroute to 192.168.1.3 (192.168.1.3), 30 hops max, 60 byte packets  1  michaelxu-server (192.168.1.3)  0.122 ms  0.065 ms  0.067 ms   External IP:   michaelxu@michaelxu-server:~$ traceroute 24.24.174.153 traceroute to 24.24.174.153 (24.24.174.153), 30 hops max, 60 byte packets  1  * * *  2  * * *  3  * * *  4  * * *  5  * * *  6  * * *  7  * * *  8  * * *  9  * * * 10  * * * 11  * *^C michaelxu@michaelxu-server:~$   ...it contines all the way to 30 ... the same thing happens if I traceroute it through the dns server  It also occurs if i do it from another online service:     Tracing route to cpe-24-24-174-153.socal.res.rr.com [24.24.174.153]...  hop rtt rtt rtt     ip address  fully qualified domain name 1   1   1   1       70.84.211.97    61.d3.5446.static.theplanet.com 2   0   0   0       70.87.254.5 po101.dsr02.dllstx5.networklayer.com 3   0   0   1       70.85.127.109   po52.dsr02.dllstx3.networklayer.com 4   0   0   0       173.192.18.230  ae17.bbr02.eq01.dal03.networklayer.com 5   0   0   0       66.109.9.97 ae-11-0.pr0.dfw10.tbone.rr.com 6   41  40  39      66.109.6.208    ae-6-0.cr0.dfw10.tbone.rr.com 7   39  39  40      66.109.6.0  ae-3-0.cr0.lax30.tbone.rr.com 8   37  39  39      66.109.6.65  9   42  40  39      72.129.9.3  agg1.lamrcadq-ccr02.socal.rr.com 10  36  36  35      72.129.10.73     11  53  60  49      24.24.209.18    ge17-0-spsdca1-ars1.socal.rr.com 12  *   *   *            13  *   *   *            14  *   *   *            15  *   *   *          What do the * * * mean? Is there any way to "fix this"
Gravitational wave solutions to the Einstein field equations It is well known that general relativity predicts gravitational waves, but I would like to know how. What solution(s) to the Einstein field equations yield something which can be interpreted as a wave(-like) phenomenon? How to install MariaDB? What is the most stable/safest way to install MariaDB? Why do PBX systems use -48 V? Rotate photo in moderncv I'm doing my CV with the template ModernCV Classic. I want to rotate my picture but the command used is \photo I don't know how to do that.  \documentclass[11pt,a4paper,sans]{moderncv}  \moderncvstyle{classic} \moderncvcolor{blue} \nopagenumbers{}  \usepackage[utf8]{inputenc}  \usepackage[latin1]{inputenc} \usepackage[T1]{fontenc} \usepackage[francais]{babel}  \usepackage[scale=0.75]{geometry}  \name{John}{Doe} \title{...} \address{adress}{Town}{Country}  \extrainfo{age, nationality} \phone[mobile]{54466145745} \email{john.doe@mail.com} \photo[80pt][0.4pt]{Photo.jpg} \quote{Objectifs: ...} Where does Google Chrome automatically save pages? Hello,    This question is about the Command Line Developer Tools that are usually installed with xcode-select --install and updated via a software update from the Mac App Store (at least until macOS 10.13). I use the developer toolchain on a daily basis and it has always worked and updated without issues.    Today I've updated my mac from High Sierra 10.13.6 to Mojave 10.14.1, and I've lost the ability to update the Developer Tools.    After the update I've executed a terminal command that relies on the developer tools being installed. It was a command to update , although I don't think that the specifics matter, as I believe that any task that tried to access the developer tools would have triggered the same error message.    The error was:   xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun       The phrasing was new (maybe), but I thought that it was caused by the usual need to re-install the Developer Tools after some macOS updates.    Later I tried to dig a bit deeper into the failure, and found out that:  $ ls -l /Library/Developer/CommandLineTools/usr/total 0drwxr-xr-x  3 root  admin  96  4 Nov 19:32 share$ which xcrun/usr/bin/xcrun$ xcode-select -p/Library/Developer/CommandLineTools    Still, as I normally do, I entered the command to install and update the Developer Tools in the terminal:  xcode-select --install    This started the usual procedure: modal window to confirm, then request to accept the license agreement, followed by a progress bar. Except that it failed very quickly with an unexpected error:     Can&rsquo;t install the software because it is not currently available from the Software Update server.     I've tried several times, to no avail. It gets always stuck.    Sometimes, however, the failure causes the System Preferences to report a pending update:      If I open that preference panel it starts searching for updates, and it always finds nothing except the first time that it happened. The first time, it found this:          It literally suggested me to install the updates for macOS 10.11 and 10.13. I have no idea why.  I closed the preference without installing, and as I said it hasn't shown them again. There is also no update available in new Mac App Store.   Is this a known issue? Is there any way to resolve the problem?     Update  Of course I can download the Dev Tools for macOS 10.14 installer from .  Before installing them manually, though, I'm wondering if there is anything that's broken with the system. Would the effect of gravity on me change if I were to dig a very deep hole and stand in it? If so, how would it change? Am I more likely to be pulled downwards, or pulled towards the edges of the hole? If there would be no change, why not? This is result of who -uH:  NAME     LINE         TIME             IDLE          PID COMMENT me    :0           2013-08-29 01:29   ?          1686 (:0) me    pts/0        2013-08-29 01:42  old         2905 (:0) me    pts/1        2013-08-29 01:45  old         2905 (:0) me    pts/2        2013-08-29 01:52  old         2905 (:0) me    pts/3        2013-08-29 02:26  old         2905 (:0) me    pts/4        2013-08-30 18:37 00:07        2905 (:0) me    pts/5        2013-08-29 10:34  old         2905 (:0) me    pts/6        2013-08-29 11:05  old         2905 (:0) me    pts/7        2013-08-29 13:34  old         2905 (:0) me    pts/8        2013-08-30 15:56 02:45        2905 (:0) me    pts/9        2013-08-30 18:27 00:17        2905 (:0) me    pts/10       2013-08-30 17:34   .          2905 (:0) me    pts/11       2013-08-30 17:37 00:13        2905 (:0) me    pts/12       2013-08-30 18:28 00:17        2905 (:0) me    pts/13       2013-08-30 18:38 00:07        2905 (:0)   Why it lists my username in 15 lines? How do I know If someone has connected to my system remotely? Setting READ UNCOMMITTED when reading DMVs I've seen several people call SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED before reading system DMVs. Is there ever any reason to do this, assuming you aren't mixing calls to DMVs and tables in the same transaction? ASP.NET "special" tags How does Cantor's diagonal argument work? Show that $y_1$ and $y_2$ are not Linearly Independent Suppose that $y_1(x)$ and $y_2(x)$ are solutions of the differential equation $y''+py'+qy=0$ on $I$. How can I show that if $y_1$ and $y_2$ vanish at the same point then they are not linearly independent?   Here is my attempt to prove the problem. Since $y_1(x)$ and $y_2(x)$ are solutions of the differential equation $y''+py'+qy=0$ on $I$, it is enough for me to show that the Wronskian of $y_1$ and $y_2$ denoted by $W(y_1,y_2)$ is zero. Now since $y_1$ and $y_2$ vanish at the same point say $p$ we have $y_1(p)=0$ and also $y_2(p)=0$.   Solving for $W(y_1,y_2)(p)$ we have: $y_1(p)y_2'(p)-y_2(p)y_1'(p)=0$ since $y_1(p)=0$ and also $y_2(p)=0$.   Am I correct? Thanks Find count of all combination of numbers whose sum is x I want to find the sum of all combination of numbers whose sum is x, for e.g.  when x = 3 f(x) = countOf(111,12,21,3) = 4 How to detect existence of a class using SFINAE? Sets with no asymptotical density over $\mathbb N$ Let's consider the  defined by:      Take $ A\subset \mathbb N$; define the sequence $x_n= \dfrac{|A\cap[1,n]|}{n}$, and then if $\lim\limits_{n\to\infty} x_n$ exists, call it $d(A)$, the density of $A$ over $\mathbb N$.   My teacher said that the collection of sets that have a natural density is not an algebra, but I don't know why. I can't even find a set that does not have a natural density.  Please help me )= Handling very large numbers in Python Accidental chown under / as root Can't log in using Firefox in Stack Overflow Here's what is happening; everytime I go to Stack Overflow (stackoverflow.com, NOT meta) with Firefox, it gives me the "Welcome back" tab that pops up from the top. Whenever I click in the "click here to refresh the page" link, all it does is refresh the page without logging me back in.  Even if I try to log in using the "log in" button at the top, all it does is pop up the tab that says "Welcome name here, you're being redirected." The problem is I'm not being logged in, not to mention that it keeps refreshing the page over and over again without giving me a choice to log in with Facebook.  For some reason, I was capable of logging in to Meta Stack Overflow using Firefox. I am still unable to log in to Stack Overflow. Any ideas? Is it possible to delete the "useless" apps pre-installed on my Mac? How can I chroot sftp-only SSH users into their homes?