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How to change the commit message of a commit in the history (not HEAD)?
ByEric MaA commit is not the HEAD now. and git commit –amend will not work for it. How to change its commit message? You can use git rebase together with git commit –amend as follows. Assume your commit to be edited is 2b8ed. $ git rebase -i 2b8ed^ Change the pick to edit in the line…
How to get logs of a specific time range on Linux?
ByEric MaThe logs I am processing is Hadoop log (log4j). It is in format like: 2014-09-20 21:55:11,855 INFO org.apache.hadoop.nfs.nfs3.IdUserGroup: Updated user map size: 36 2014-09-20 21:55:11,863 INFO org.apache.hadoop.nfs.nfs3.IdUserGroup: Updated group map size: 55 2014-09-20 22:10:11,907 INFO org.apache.hadoop.nfs.nfs3.IdUserGroup: Update cache now 2014-09-20 22:10:11,907 INFO org.apache.hadoop.nfs.nfs3.IdUserGroup: Not doing static UID/GID mapping because ‘/etc/nfs.map’ does not exist. Now, I…
How to change the maximum uploading size for PHP with Apache on Linux?
ByQ AHow to change the maximum uploading size for PHP with Apache on Linux? PHP has parameters to control the maximum uploading size. Here, we use Ubuntu 18.04 LTS default version as an example. First, open the php.ini configuration file using your favorite editor /etc/php/7.2/apache2/php.ini Then, find the following parts ; Maximum size of POST data…
How to embed a Map image from Google Map in a website?
ByEric MaGoogle Map has APIs. But the requirement is that the Map image should be static and uploaded to the website only. No request or dependency on Google’s website should be needed so that the website can run without Internet. Is it possible or allowed (like a screenshot of the Google Map)? If not, any suggestions…
How to package a Scala project to a .jar with sbt?
ByEric MaHow to package a Scala project to a .jar file with sbt? Manually packaging the .class files are fine but too tedious. A jar of just the project classes The command: sbt package will produces the main artifact as a jar into target/scala-2.x.y/project_name_2.x.y-zz.jar. Continuously building the package: sbt ~package Standalone jar with all dependencies If…
How to flush STDOUT buffer in Python?
ByEric MaHow to flush the STDOUT buffer in Python so that the content wrote to STDOUT is shown immediately? Call the flush library function on sys.stdout which is the STDOUT: import sys sys.stdout.flush() From python doc: flush() Flush the write buffers of the stream if applicable. This does nothing for read-only and non-blocking streams. If you…