Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
Remove all queued message in Postfix
Answer:
To remove queued message in your Postfix server, you should always check the queue listing first.
When you have confirmed, then you can do
1. Remove specific message based on Queue ID (You can find the ID via postqueue command)
# sudo postsuper -d Queue_ID
2. Remove all messages
# sudo postsuper -d ALL
Post a file to a server using the Curl command
Answer:
You can simulate a HTTP form post, with a file being uploaded to a remote server using the curl command.
curl -F 'photo=@/upload/image.jpg' http://example.com/upload.phpAssume the name of the form element of your upload is called "photo"
Edit a remote file with vim over SSH
Answer:
If you have a remote file and you can have a quick edit, if you use the following command:
# ssh -t john@remote-server vim /data/test.txt
You will be prompted to login if you don't have proper ssh key in the remote server, and after finishing editing the file, you will quit the ssh session automatically.
Delete files permanently with shred command
Answer:
Sometimes we might need to delete files and don't want it can be recovered.
To do so, use the shred command.
# shred -v -n 10 -u -z test.txt
The above command will overwrite the file 10 times before deleting it.
Import files and directories into a SVN repository
Answer:
To import files and directories into a SVN repository, you can use the svn import command.
E.g.
Import all files and directories under the current working directory "project1" to a local SVN repository
# cd /data/project1
svn import file:///data/svn/project1
