Commands by zyf543 (0)

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Echo the contents of a Url
Directly send the content of a url to standard out. This command is most convenient for sending the output of a download directly to another command.

Rotate a video file by 90 degrees CW

Output as many input
Output of a command as input to many

Find out the last times your system was rebooted (for the duration of wtmp).

How to trim a video using ffmpeg
Will trim the video to 4 seconds starting from the beginning. The -vcodec , -acodec options are required so that ffmpeg knows in what video/audio format you want for the new video.

Unzip multiple files with one command
With this command you can easily unzip multiple zip files with just one command. All you need to do is to use single quotes.

Watch for when your web server returns
If your web server is down, this command will periodically attempt to connect to it. If the output is blank, your server is not yet up. If you see HTML, your server is up. Obviously, you need to replace the Google URL with your web server URL... * 'watch' -- a command for re-executing a command and displaying the output * '-n 15' -- tells watch to redo the command every 15 seconds * 'curl' -- a handy utility for getting the source of a web page * '-s' -- tells curl to be silent about failing * '--connect-timeout 10' -- Try to connect for 10 seconds

generate iso

Find the package that installed a command

Monitor ElasticSearch cluster health - Useful for keeping an eye on ES when rebalancing takes place


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