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MySql server startup error 'The server quit without updating PID file '
...ably problem with permissions
check if any mysql instance is running
ps -ef | grep mysql
if yes, you should stop it, or kill the process
kill -9 PID
where PID is the number displayed next to username on output of previous command
check ownership of /usr/local/var/mysql/
ls -laF /u...
Execute another jar in a Java program
...lic static void main(String []args) throws Exception
{
Process ps=Runtime.getRuntime().exec(new String[]{"java","-jar","A.jar"});
ps.waitFor();
java.io.InputStream is=ps.getInputStream();
byte b[]=new byte[is.available()];
is.read(b,0,b.length);
Sy...
How to fix Error: listen EADDRINUSE while using nodejs?
...or me was:
killall -9 node
But this will kill a system process.
With
ps ax
you can check if it worked.
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【独家重磅】AppInventor2支持自定义apk包名(PackageName) - App Inventor ...
自定义包名：
包名规则：
编译后的apk信息：
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Does ruby have real multithreading?
...ple Ruby program which uses 3 threads using Ruby 2.1.0:
(jalcazar@mac ~)$ ps -M 69877
USER PID TT %CPU STAT PRI STIME UTIME COMMAND
jalcazar 69877 s002 0.0 S 31T 0:00.01 0:00.04 /Users/jalcazar/.rvm/rubies/ruby-2.1.0/bin/ruby threads.rb
69877 0.0 S 31T 0:00...
Can Powershell Run Commands in Parallel?
...easy to invoke a separate script file. Just use Start-Job -FilePath script.ps1 -ArgumentList $_
– Chad Zawistowski
Jun 16 '16 at 22:54
...
How to output something in PowerShell
..., if you call the script with redirected output, something like yourscript.ps1 > out.txt, you will get test2 on the screen test1\ntest3\n in the "out.txt".
Note that "test3" and the Write-Output line will always append a new line to your text and there is no way in PowerShell to stop this (that ...
How to debug a bash script? [closed]
...sts after they are expanded and before they are executed. The value of the PS4 variable is expanded and the resultant value is printed before the command and its expanded arguments.
That much does not seem to indicate different behaviour at all. I don't see any other relevant references to '-x' ...
Which is faster in Python: x**.5 or math.sqrt(x)?
...port math
N = 1000000
%%timeit
for i in range(N):
z=i**.5
10 loops, best of 3: 156 ms per loop
%%timeit
for i in range(N):
z=math.sqrt(i)
10 loops, best of 3: 91.1 ms per loop
Using Python 3.6.9 (notebook).
...
Copying files from Docker container to host
...gen is the container name I got from the following command:
$ sudo docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1b4ad9311e93 bamos/openface "/bin/bash" 33 min...