功能強大的系統工具Sysdig命令實例介紹
作者：佚名
Sysdig是一個能夠讓系統管理員和開發人員以前所未有方式洞察其系統行為的監控工具。我們可以用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，請告訴我們！
Sysdig是一個能夠讓系統管理員和開發人員以***方式洞察其系統行為的監控工具。我們可以用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，請告訴我們！
1.網絡
查看占用網絡帶寬最多的進程：
- sysdig -c topprocs_net
顯示主機192.168.0.1的網絡傳輸數據：
- 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
查看連接最多的服務器端口：
- 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
查看客戶端連接最多的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
列出所有不是訪問apache服務的訪問連接：
- sysdig -p"%proc.name %fd.name" "evt.type=accept and proc.name!=httpd"
2.容器
查看機器上運行的容器列表及其資源使用情況：
- sudo csysdig -vcontainers
查看容器上下文的進程列表：
- sudo csysdig -pc
查看運行在wordpress1容器里CPU的使用率：
- sudo sysdig -pc -c topprocs_cpu container.name=wordpress1
查看運行在wordpress1容器里網絡帶寬的使用率：
- sudo sysdig -pc -c topprocs_net container.name=wordpress1
查看在wordpress1容器里使用網絡帶寬最多的進程：
- sudo sysdig -pc -c topprocs_net container.name=wordpress1
查看在wordpress1 容器里占用 I/O 字節最多的文件：
- sudo sysdig -pc -c topfiles_bytes container.name=wordpress1
查看在wordpress1 容器里網絡連接的排名情況：
- sudo sysdig -pc -c topconns container.name=wordpress1
顯示wordpress1容器里所有命令執行的情況：
- sudo sysdig -pc -c spy_users container.name=wordpress1
3.應用
查看機器所有的HTTP請求：
- sudo sysdig -s 2000 -A -c echo_fds fd.port=80 and evt.buffer contains GET
查看機器所有的SQL select查詢：
- 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.硬盤 I/O
查看使用硬盤帶寬最多的進程：
- sysdig -c topprocs_file
列出使用大量文件描述符的進程：
- 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
進程和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
性能和錯誤：
- 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
責任編輯：火鳳凰
來源：
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