Sysdig是一个能够让系统管理员和开发人员以***方式洞察其系统行为的监控工具。我们可以用sysdig命令做很多很酷的事情。你如果有更有趣的用法，想添加到下面的命令例子中，请告诉我们！
1.网络
查看占用网络带宽最多的进程：
- sysdig -c topprocs_net
显示主机192.168.0.1的网络传输数据：
- as binary:
- sysdig -s2000 -X -c echo_fds fd.cip=192.168.0.1
- as ASCII:
- sysdig -s2000 -A -c echo_fds fd.cip=192.168.0.1
查看连接最多的服务器端口：
- in terms of established connections:
- sysdig -c fdcount_by fd.sport "evt.type=accept"
- in terms of total bytes:
- sysdig -c fdbytes_by fd.sport
查看客户端连接最多的ip：
- in terms of established connections
- sysdig -c fdcount_by fd.cip "evt.type=accept"
- in terms of total bytes
- sysdig -c fdbytes_by fd.cip
列出所有不是访问apache服务的访问连接：
- sysdig -p"%proc.name %fd.name" "evt.type=accept and proc.name!=httpd"
2.容器
查看机器上运行的容器列表及其资源使用情况：
- sudo csysdig -vcontainers
查看容器上下文的进程列表：
- sudo csysdig -pc
查看运行在wordpress1容器里CPU的使用率：
- sudo sysdig -pc -c topprocs_cpu container.name=wordpress1
查看运行在wordpress1容器里网络带宽的使用率：
- sudo sysdig -pc -c topprocs_net container.name=wordpress1
查看在wordpress1容器里使用网络带宽最多的进程：
- sudo sysdig -pc -c topprocs_net container.name=wordpress1
查看在wordpress1 容器里占用 I/O 字节最多的文件：
- sudo sysdig -pc -c topfiles_bytes container.name=wordpress1
查看在wordpress1 容器里网络连接的排名情况：
- sudo sysdig -pc -c topconns container.name=wordpress1
显示wordpress1容器里所有命令执行的情况：
- sudo sysdig -pc -c spy_users container.name=wordpress1
3.应用
查看机器所有的HTTP请求：
- sudo sysdig -s 2000 -A -c echo_fds fd.port=80 and evt.buffer contains GET
查看机器所有的SQL select查询：
- sudo sysdig -s 2000 -A -c echo_fds evt.buffer contains SELECT
- See queries made via apache to an external MySQL server happening in real time
- sysdig -s 2000 -A -c echo_fds fd.sip=192.168.30.5 and proc.name=apache2 and evt.buffer contains SELECT
4.硬盘 I/O
查看使用硬盘带宽最多的进程：
- sysdig -c topprocs_file
列出使用大量文件描述符的进程：
- sysdig -c fdcount_by proc.name "fd.type=file"
- See the top files in terms of read+write bytes
- sysdig -c topfiles_bytes
- Print the top files that apache has been reading from or writing to
- sysdig -c topfiles_bytes proc.name=httpd
- Basic opensnoop: snoop file opens as they occur
- sysdig -p "%12user.name %6proc.pid %12proc.name %3fd.num %fd.typechar %fd.name" evt.type=open
- See the top directories in terms of R+W disk activity
- sysdig -c fdbytes_by fd.directory "fd.type=file"
- See the top files in terms of R+W disk activity in the /tmp directory
- sysdig -c fdbytes_by fd.filename "fd.directory=/tmp/"
- Observe the I/O activity on all the files named 'passwd'
- sysdig -A -c echo_fds "fd.filename=passwd"
- Display I/O activity by FD type
- sysdig -c fdbytes_by fd.type
进程和CPU使用率：
- See the top processes in terms of CPU usage
- sysdig -c topprocs_cpu
- See the top processes for CPU 0
- sysdig -c topprocs_cpu evt.cpu=0
- Observe the standard output of a process
- sysdig -s4096 -A -c stdout proc.name=cat
性能和错误：
- See the files where most time has been spent
- sysdig -c topfiles_time
- See the files where apache spent most time
- sysdig -c topfiles_time proc.name=httpd
- See the top processes in terms of I/O errors
- sysdig -c topprocs_errors
- See the top files in terms of I/O errors
- sysdig -c topfiles_errors
- See all the failed disk I/O calls
- sysdig fd.type=file and evt.failed=true
- See all the failed file opens by httpd
- sysdig "proc.name=httpd and evt.type=open and evt.failed=true"
- See the system calls where most time has been spent
- sysdig -c topscalls_time
- See the top system calls returning errors
- sysdig -c topscalls "evt.failed=true"
- snoop failed file opens as they occur
- sysdig -p "%12user.name %6proc.pid %12proc.name %3fd.num %fd.typechar %fd.name" evt.type=open and evt.failed=true
- Print the file I/O calls that have a latency greater than 1ms:
- sysdig -c fileslower 1
5.安全
- Show the directories that the user "root" visits
- sysdig -p"%evt.arg.path" "evt.type=chdir and user.name=root"
- Observe ssh activity
- sysdig -A -c echo_fds fd.name=/dev/ptmx and proc.name=sshd
- Show every file open that happens in /etc
- sysdig evt.type=open and fd.name contains /etc
- Show the ID of all the login shells that have launched the "tar" command
- sysdig -r file.scap -c list_login_shells tar
- Show all the commands executed by the login shell with the given ID
- sysdig -r trace.scap.gz -c spy_users proc.loginshellid=5459
