error

error

[toc]

---

troubleshoot

Error

├─Netowork unreachable : `ping` it
│ ├─ping "Netowork unreachable" : check `ip route`
│ ├─ping "Netowork unreachable" : `arp -a`
├─No route to host :
│ ├─check service/Port `ss -lnt4`
│ ├─wireshark
│ │ ├─Destination unreachable (Host administratively prohibited): firewall configuration issue `firewall-cmd --list-all`

layer 1: eth-tool layer 2: arp layer 3: ip (addr/route), route, ping layer 4: netstat, ss

tools: Wireshark,

$PATH

echo $PATH
/opt/local/bin:
/opt/local/sbin:
/usr/local/sbin:
/Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home/bin:

/usr/local/bin:
/usr/bin:
/bin:
/usr/sbin:
/sbin:
/usr/local/share/dotnet:
/opt/X11/bin:
~/.dotnet/tools:
/Library/Apple/usr/bin:
/Library/Frameworks/Mono.framework/Versions/Current/Commands:
/Applications/Wireshark.app/Contents/MacOS:
/Applications/Xamarin Workbooks.app/Contents/SharedSupport/path-bin:
.:
/usr/local/mysql/bin

/opt/local/bin/ncursesw6-config /opt/local/bin/ncurses6-config

The ‘pip==19.0.2’ distribution was not found and is required by the application

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/pkg_resources/__init__.py", line 583, in _build_master
    ws.require(__requires__)
  File "/usr/local/lib/python3.7/site-packages/pkg_resources/__init__.py", line 900, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/local/lib/python3.7/site-packages/pkg_resources/__init__.py", line 791, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.VersionConflict: (pip 19.0.3 (/usr/local/lib/python3.7/site-packages), Requirement.parse('pip==19.0.2'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/opt/python/libexec/bin/pip", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/usr/local/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3191, in <module>
    @_call_aside
  File "/usr/local/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3175, in _call_aside
    f(*args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3204, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/local/lib/python3.7/site-packages/pkg_resources/__init__.py", line 585, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/local/lib/python3.7/site-packages/pkg_resources/__init__.py", line 598, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/local/lib/python3.7/site-packages/pkg_resources/__init__.py", line 786, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==19.0.2' distribution was not found and is required by the application

solution:

brew reinstall python
pip install pip --upgrade

homebrew

Warning: Unbrewed header files were found in /usr/local/include.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

solution

copy the list of file into headers.txt

cat header.txt | sudo xargs rm

---

Error: Specified qdisc not found.

Solution

Execute the following command to load sch_netem module. The cause of the error is sch_netem kernel module not loaded in your system which required to set up traffic control.

$ sudo modprobe sch_netem

If the command failed with the below message, you need to install additional kernel module.

$ sudo dnf install -y kernel-modules-extra

Load sch_netem module after the package installation.

$ sudo modprobe sch_netem

.