How to use $ in xs:pattern?
What special characters must be escaped in regular expressions?
using tar showing, "No Such file or directory" But when I try to run it using  tar zxvf jre-8u151-linux-i586   I get tar (child): jre-8u151-linux-i586: Cannot open: No such file or directory tar (child): Error is not recoverable: exiting now tar: Child returned status 2  What is wrong? The name and place matches prefectly. iCloud says Password is Wrong Even Though I Know It's Right iCloud says that my password is wrong - even though I know it's right.  Here's whats happened: Yesterday, I reset my iCloud password. Got the reset email, changed password. Tried to log in to the account, didn't accept it. I thought that maybe my finger had slipped typing in the password (twice). I called support, got the reset email.  Now, here's the really, really weird thing: I wanted to make sure I got the password right - so I typed my password into TextEdit, copied it into the reset fields and reset the password. After reseting it, I immediately went to icloud.com and tried to log in using the copied password from TextEdit. The passwords are the same. iCloud won't let me in. How to factory reset without data loss and undue pain? in bash I have some jobs running, in background. They are always producing random irrelevant error messages that pollute the terminal. I am not always so prompt to start them with the 2&gt;&amp;1 &gt; /dev/null redirect. How can I redirect the output when they are already running? A question about long exact sequence of finite dim vector spaces "Can/may/will you help me with this?" Which word to use when we ask for help?  Some conditions:     We know that the person asked is able to do it. We don't know if the person asked is able to do it. I accidentally moved all folders from root to a subfolder. (/bin, /etc, /home, /lib, /usr... all moved) The only ones that were not moved, since they were in use, are  /bak, /boot, /dev, /proc, /sys.  Now, any command that I try to execute will simply not happen. I constantly get "No such file or directory".  I am connected through ssh and through ftp, but I cannot move files through ftp, as direct SU login is disabled. I also have access to the actual server if I need to do something directly from there.  I'm assuming I would need to edit a configuration file in order to tell it where to find the /bin folder and that would help me get access again, but I don't know which file that would be or how to do it (since I can't even run chmod to change permissions).  Is there any way out of this other than re-installing?  I am working on an old version of CentOS.  I'm extremely new to the world of Linux, hence this action and the question... Deciding whether $2^{\sqrt2}$ is irrational/transcendental Is $2^\sqrt{2}$ irrational? Is it transcendental? Compute Engine - 1000 GB disk cant decrease size i have a huuuuge problem.  Created a snapshot and image from my instance...instance has 1000GB of disk.  Now i need to reduce it but everytime i try to create an image or a snapshot from that, i get the same error "Disk need to be at least 1000GB".  There is a way to reduce disk size directly on instance? Some workaround? From  (emphasis mine):     Neutron degeneracy is a stellar application of the Pauli Exclusion Principle, as is electron degeneracy. No two neutrons can occupy identical states, even under the pressure of a collapsing star of several solar masses. For stellar masses less than about 1.44 solar masses (the Chandrasekhar limit), the energy from the gravitational collapse is not sufficient to produce the neutrons of a neutron star, so the collapse is halted by electron degeneracy to form white dwarfs. Above 1.44 solar masses, enough energy is available from the gravitational collapse to force the combination of electrons and protons to form neutrons. As the star contracts further, all the lowest neutron energy levels are filled and the neutrons are forced into higher and higher energy levels, filling the lowest unoccupied energy levels. This creates an effective pressure which prevents further gravitational collapse, forming a neutron star. However, for masses greater than 2 to 3 solar masses, even neutron degeneracy can't prevent further collapse and it continues toward the black hole state.   How then, can they collapse, without violating the Pauli Exclusion Principle? At a certain point does it no longer apply? Do we use abstract algebra in real life? Do we use abstract algebra in real life?   Is there any application of abstract algebra in real life? Complicated FOR loop nesting. Having trouble cleaning up legacy code I am trying to tidy up some really bad legacy code from an old developer and I'm trying to get rid of these nested for loops. The code below shows what I'm currently working with. I've fixed this before with nested SOQL queries but nothing like this. How would this need to look to remove these for loops (except Trigger.New)? Would I use Maps? How would I do that?  map&lt;Id,SObject&gt; mapProperyIdBudDetail = util.GetObjFields(setPropertyId, 'Property'); map&lt;Id,SObject&gt; mapSpaceIdBudDetail = util.GetObjFields( PropertyMap.keyset(), 'Space');  for ( Lease__c l: Trigger.New ) {      if(mapProperyIdBudDetail.get(PropertyMap.get(l.space__c))!=null) {          lProperties = new List&lt;SObject&gt;{mapProperyIdBudDetail.get(PropertyMap.get(l.space__c))};              for ( SObject p: lProperties ) {                  for ( String fm: FieldMap.keyset() ) {                      if ( p.get(FieldMap.get(fm)) != Null) {                         l.put(fm,p.get(FieldMap.get(fm)));                     }                  }             }     } } Filter the score of the questions on the homepage before loading them At the moment questions on the homepage are loaded by the top N most recent and then ones with a score of -4 or less are filtered out. This doesn't make much difference for a user who is logged in but consider anonymous users; their home page is only 15 questions in length. If someone was to edit several posts that bump to the top with a score of -4 or less then the home page looks tiny. At the moment on SFF, for example, the homepage for anonymous users only shows 9 questions:  At one point it only showed 3 questions (a few weeks back):  Can the filtering logic be changed to before the questions are loaded to appear on the homepage? Flag abusive users I think the community does a great job policing questions/answers, etc. and the community has some good tools available to do this.  Between flagging questions with some reasons behind it and editing posts, closing them, and deleting them, the only thing that seems to be missing to me is the ability to flag a user.  Reasons to flag a user as abusive:   Duplicate User Abusive Behavior Offensive user name or profile User profile consists of spam Others? How to configure blender so that it uses only 50% of total CPU when rendering? Wrongly set chmod / 777. Problems? I was trying to run chmod -R 777 ./ but ended up typing chmod -R 777 / and set 777 on my entire machine. What can go wrong? How can I fix it? I was wondering if someone knows if there is a foot/feet symbol available in any of latex packages that I could use in my text? I would appreciate any hint.  I do really mean a foot/feet icon as in the picture below. What is the best way to generate a GUID/UUID from Apex code (such as a trigger)? Preferably in the following format:     nnnnnnnn-nnnn-nnnn-nnnnnnnnnnnnnnnnn   Example:     13219ec0-3a81-44c5-a300-de14b7d0235f Can I use B1 visa (Visitor-Business) to travel to the Canada without a business purpose? I got a B1 visa (Visitor-Business) for Canada in 2012 when I traveled to Canada for a business trip from my company. It expires in 2015 and I'd love to visit the Canada again, but for no other purpose than traveling, visiting family.  I want to know, If I can legally travel to Canada with B1 visa without a real business need (assuming I'm honest);  I live in India, and I have B1/B2 from US and used same Visa for Business &amp; Personal visits multiple times. Does the word discharge sound more like /dɪstʃɑːʳdʒ/ or /dɪsdʒɑːʳdʒ/? How about exchange or disproportion? Do they sound more like /ɪkstʃeɪndʒ/ or /ɪksdʒeɪndʒ/? /dɪsprəpɔːʳʃən/ or /dɪsbrəpɔːʳʃən/? I know the word student which commonly sounds like /sdjuːdənt/. and the dictionary says its IPA transcription is /stjuːdənt/.