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Computer/linux

• too much log information in ufw

  Computer/linux 2022. 4. 13. 02:40

  Open /etc/rsyslog.d/20-ufw.conf change it according to the following # Log kernel generated UFW log messages to file :msg,contains,"\[UFW " -/var/log/ufw.log # Uncomment the following to stop logging anything that matches the last rule. # Doing this will stop logging kernel generated UFW log messages to the file # normally containing kern.\* messages (eg, /var/log/kern.log) & stop "-" in front o..

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• a simply and robust way to get `HOST_ARCH`

  Computer/linux 2020. 7. 11. 09:05

  uname -sm | tr -s '[:upper:][:blank:]' '[:lower:][\-]'

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• A2DP Bluetooth audio choppy sound

  Computer/linux 2020. 7. 1. 05:44

  I am happy to use the Cowin E7 headset for listening music from my old iMac with Debain 10. However, the connection is going to choppy after I pause audio play from time to time. With Google uncle's help, I'v found the site which gives me the clear resolution askubuntu.com/questions/475987/a2dp-on-pulseaudio-terrible-choppy-skipping-audio We can do this in both ways : command line and GUI. $ pac..

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• Reduce a scanned pdf file

  Computer/linux 2020. 6. 5. 14:20

  convert -density 300x300 -quality 60 -compress jpeg in.pdf out.pdf One can adjust density in order to increase or decrease the output file size.

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• bluetooth failed in Debian

  Computer/linux 2020. 6. 2. 03:18

  The error message shows the following: bluetoothd[3174]: Sap driver initialization failed. bluetoothd[3174]: sap-server: Operation not permitted (1) Stop and disable bluetooth service sudo systemctl stop bluetooth sudo systemctl disable bluetooth Edit the following file /lib/systemd/system/bluetooth.service and add additional options to disable sap --noplugin=sap option such as ExecStart=/usr/li..

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• Allow a VM Guest to have the same subnet network as a host has.

  Computer/linux 2020. 5. 19. 06:46

  VirtualBox Guest OS usually doesn't belong to the same subnet which Host OS is. We can set the guest OS network configuration as "Bridged Adapter". In addtion, the Adapter Type should be selected as PCnet-FAST III, which is supported by almost all OSs. However, one should try others first.

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• git repository mirror creation

  Computer/linux 2020. 5. 2. 15:53

  git clone --bare SOURCE_URL/SOURCE.git cd SOURCE.git git fetch git remote add new-origin MIRROR_URL/MIRROR.git git remote set-url new-origin git@github.com:USERNAME/MIRROR.git (only for 2FA of github) git push new-origin --mirror cd .. rm -rf SOURCE.git

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• Undo git push

  Computer/linux 2017. 10. 22. 07:01

  Sometime, I would like to remove what I push into the git branch, in that case, the following two steps can give me a way to do so.. 1) check the hash if you want to revert.... 2) git push -f origin hash_id_if_you_want_to_rever:branch_name

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