Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
Enable debug log for Nginx
Answer:
Sometimes, you need to enable the debug log feature on Nginx for troubleshooting some nasty issues.
Firstly, you need to make sure you have configured nginx to build with the debugging feature enabled
# ./configure --with-debug ...
If you are using the installing using apt-get on Ubuntu, you are ready to go by setting the following in the Nginx config:
...
error_log /path/to/log debug;
...Don't forget to restart the Nginx to take effect.
How to merge a branch back into trunk using SVN
Answer:
To merge a branch back into the trunk using SVN: (Assume your local corresponding folders are branch and trunk)
1. Get the revision number at which the branch was created
# cd branch
# svn log --stop-on-copy2. Get the head revision number of your trunk
# cd trunk
# svn update3. Merge in action
# cd trunk
# svn merge -r <BRANCH_CREATION_REVISION_NUMBER>:<HEAD_REVISION_NUMBER>
http://example.com/svn/repos/demo/branches/<MY_BRANCH> .
Exclude files when using the du to estimate disk usage
Answer:
It is easy to use du command to estimate disk usage, however, sometimes you want to ignore some files during the calculation.
To do so, try
# du -h --exclude='*.bak'
The above command will exclude all the file end with the extension .bak during the disk space calculation.
Revert all local changes in SVN
Answer:
Too revert all local changes in your current SVN repository, you can run the following command
# svn st -q | awk '{print $2;}' | xargs svn revert
That is it.
List all active guest domains in Xen
Answer:
To list all active guest domains in Xen, you can use the xm list command.
# xm list
Name ID Mem(MiB) VCPUs State Time(s)
Domain-0 0 768 2 r----- 1029.3
Web-server 12 256 1 -b---- 13.7