Sysdig Examples

This is an ever growing list of cool things you can do with sysdig commands.

Got another interesting idea? Anything that you would find useful and that isn't here? Feel free to add to this list, or send a message to the sysdig mailing list to discuss!

Note: Make sure you also take a look at csysdig, which packs a lot of useful functionality into a simple to use UI.
Note: The command lines on this page return live data. However, you can use them with trace files too by just adding the -r switch.
Note: If you need a list of basic sysdig commands, for instance to learn how to create a trace file, see the quick reference guide

Networking
Containers
Application
Disk I/O
Processes and CPU usage
Performance and Errors
Security
Tracing

Networking

See the top processes in terms of network bandwidth usage
```
  sysdig -c topprocs_net
```

Show the network data exchanged with the host 192.168.0.1

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

See the top local server ports

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
```

See the top client IPs

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
```

List all the incoming connections that are not served by apache.

  sysdig -p"%proc.name %fd.name" "evt.type=accept and proc.name!=httpd"

Containers

View the list of containers running on the machine and their resource usage
```
  sudo csysdig -vcontainers
```
View the list of processes with container context
```
  sudo csysdig -pc
```
View the CPU usage of the processes running inside the wordpress1 container
```
  sudo sysdig -pc -c topprocs_cpu container.name=wordpress1
```
View the network bandwidth usage of the processes running inside the wordpress1 container
```
  sudo sysdig -pc -c topprocs_net container.name=wordpress1
```
View the processes using most network bandwidth inside the wordpress1 container
```
  sudo sysdig -pc -c topprocs_net container.name=wordpress1
```
View the top files in terms of I/O bytes inside the wordpress1 container
```
  sudo sysdig -pc -c topfiles_bytes container.name=wordpress1
```
View the top network connections inside the wordpress1 container
```
  sudo sysdig -pc -c topconns container.name=wordpress1
```
Show all the interactive commands executed inside the wordpress1 container
```
  sudo sysdig -pc -c spy_users container.name=wordpress1
```

Application

See all the GET HTTP requests made by the machine

  sudo sysdig -s 2000 -A -c echo_fds fd.port=80 and evt.buffer contains GET

See all the SQL select queries made by the machine

  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

Disk I/O

See the top processes in terms of disk bandwidth usage
```
  sysdig -c topprocs_file
```
List the processes that are using a high number of files
```
  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
```

Processes and CPU usage

See the top processes in terms of CPU usage
```
  sysdig -c topprocs_cpu
```

Observe the standard output of a process

  sysdig -s4096 -A -c stdout proc.name=cat

Performance and Errors

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
```

Security

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
```
Applied use of sysdig for forensics analysis:
- Fishing for Hackers: Analysis of a Linux Server Attack
- Fishing for Hackers (Part 2): Quickly Identify Suspicious Activity With Sysdig

Tracing

Create a trace to measure website latency:

  echo ">::website-latency::" > /dev/null

  curl -s http://sysdig.org > /dev/null	

  echo "<::website-latency::" > /dev/null

Measure a span defined by a login attempt, identified by the thread:

  echo ">:t:login:username=loris:" > /dev/null

  echo "<:t:login::" > /dev/null

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