reinstall-fedora-note.txt
1. backup virtualbox VMs
2. firefox bookmarks
3. /usr/share/inkscape/icons & /usr/share/inkscape/symbols
4. /root/图片
5. /opt/tools/network_simulators/ns3/ns-allinone-3.25/ns-3.25/scratch/
2. firefox bookmarks
3. /usr/share/inkscape/icons & /usr/share/inkscape/symbols
4. /root/图片
5. /opt/tools/network_simulators/ns3/ns-allinone-3.25/ns-3.25/scratch/