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127 Return code from $?
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Value 127 is returned by /bin/sh when the given command is not found within your PATH system variable and it is not a built-in shell command. In other words, the system doesn't understand your command, because it doesn't know where to find the binary you're trying to call.
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Difference between java.io.PrintWriter and java.io.BufferedWriter?
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The API reference for BufferedWriter and PrintWriter detail the differences.
The main reason to use the PrintWriter is to get access to the printXXX methods like println(). You can essentially use a PrintWriter to write to a file just like you would use System...
How do I pause my shell script for a second before continuing?
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Use the sleep command.
Example:
sleep .5 # Waits 0.5 second.
sleep 5 # Waits 5 seconds.
sleep 5s # Waits 5 seconds.
sleep 5m # Waits 5 minutes.
sleep 5h # Waits 5 hours.
sleep 5d # Waits 5 days.
One can also employ decimals when specifyin...
How can i use iptables on centos 7? [closed]
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It is possible to go back to a more classic iptables setup. First, stop and mask the firewalld service:
systemctl stop firewalld
systemctl mask firewalld
Then, install the iptables-services package:
yum install iptables-services
Enable the service at boot-time:
systemctl enable iptables
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Reading and writing binary file
...r only stores a couple of ASCII characters from the first line in the file and nothing else.
7 Answers
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Do I need to close() both FileReader and BufferedReader?
...Reader.close()
closes the stream according to javadoc for BufferedReader and InputStreamReader
as well as
FileReader.close()
does.
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Class JavaLaunchHelper is implemented in both … libinstrument.dylib. One of the two will be used. Wh
I upgraded to the latest Java 7u40 on MacOS X and started getting the following message on the console when launching my application using Eclipse. The app works fine but I would like to find out the cause of the problem and hopefully a fix for it.
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How do I fire an event when a iframe has finished loading in jQuery?
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I am trying this and seems to be working for me:
http://jsfiddle.net/aamir/BXe8C/
Bigger pdf file:
http://jsfiddle.net/aamir/BXe8C/1/
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How to change the Eclipse default workspace?
...hat should I do if want to change the root directory of eclipse (for file handing in java)?
– Dhruv Singhal
Aug 3 '18 at 13:59
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Use tnsnames.ora in Oracle SQL Developer
...-> Preferences, as shown in below image.
In the Preferences options expand Database --> select Advanced --> under "Tnsnames Directory" --> Browse the directory where tnsnames.ora present.
Then click on Ok,
as shown in below diagram.
tnsnames.ora available at Drive:\oracle\product\10x.x....