| # To extract the sound from a video and save it as MP3: | |
| ffmpeg -i <video.mp4> -vn <sound>.mp3 | |
| # To convert frames from a video or GIF into individual numbered images: | |
| ffmpeg -i <video.mpg|video.gif> <frame_%d.png> | |
| # To combine numbered images (frame_1.jpg, frame_2.jpg, etc) into a video or GIF: | |
| ffmpeg -i <frame_%d.jpg> -f image2 <video.mpg|video.gif> | |
| # To quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image: |
| # maximum capability of system | |
| user@ubuntu:~$ cat /proc/sys/fs/file-max | |
| 708444 | |
| # available limit | |
| user@ubuntu:~$ ulimit -n | |
| 1024 | |
| # To increase the available limit to say 200000 | |
| user@ubuntu:~$ sudo vim /etc/sysctl.conf |
| #!/bin/bash | |
| [ $# -eq 0 ] && echo "see aria2c -h" && exit | |
| url="" | |
| cdn=' | |
| 120.52.73.2 | |
| 120.52.73.4 | |
| 120.52.73.6 | |
| 120.52.73.7 | |
| 120.52.73.10 |
| Rsync (Remote Sync): 10 Practical Examples of Rsync Command in Linux
Linux/Unix系统中，同本地操作一样能够进行远程拷贝，同步文件和文件夹的场景中，用得最多的命令就是Rsync(Remote Sync)。 使用rsync命令，可以用来在本地，远程机器之间拷贝同步文件，文件夹；能够跨文件夹，跨硬盘和网络；进行数据备份；制作机器镜像。
该文章包含了简单和高级的10个例子，解释了使用rsync命令将文件在本地和远程的linux机器之间传递。 运行rsync命令并不需要root用户的权限。
When speaking of the Icecast protocol here, actually it's just the HTTP protocol, and this document will explain further how source clients need to send data to Icecast.
Since Icecast version 2.4.0 there is support for the standard HTTP PUT method.
The mountpoint to which to send the data is specified by the URL path.
| # Install Xcode/Preferences/Downloads/Command Line Tools, this will install make for OSX | |
| # Download HAProxy source (tar.gz) bundle. | |
| make ARCH=x86_64 and TARGET=darwin | |
| make install | |
| # Once the installation is complete haproxy executable could be found at: /usr/local/sbin/haproxy |
| # to generate your dhparam.pem file, run in the terminal | |
| openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048 |
