Practice makes perfect Practice makes perfect

Linux

• a simply and robust way to get `HOST_ARCH`

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

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

  Read More

• 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.

  Read More

• Combine multiple PDF files to a pdf file

  Computer/linux 2017. 8. 28. 21:58

  In the case, one want to create one pdf file from N pdf files, gs will save us to do this quickly. For example, one has the following pdf files : 1.pdf2.pdf....10.pdf And would like to have result.pdf from these pdf files, the following command will create the result.pdf file gs -q -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=result.pdf -dBATCH file{1..10}.pdf

  Read More

• how to acceess udev rule parameter

  Computer/linux 2017. 8. 25. 22:36

  Sometime, one needs to access all attribute on a device in order to create the udev rule for this device. $ udevadm info --query=all -n /dev/EtherCAT0 --attribute-walk Udevadm info starts with the device specified by the devpath and then walks up the chain of parent devices. It prints for every device found, all possible attributes in the udev rules key format. A rule to match, can be composed b..

  Read More

• How to get only the mac address (Linux)

  Computer/linux 2017. 8. 25. 17:24

  Sometime, I would like to get only the mac address of the ethernet device. so here is the command line to do this. ip addr show dev enp5s0 | grep "link/ether" | awk '{print $2}'

  Read More

• Exact copy a huge directory into the different one in linux

  Computer/linux 2017. 3. 15. 06:34

  I have ifc1410-ioxos-161103 in /export/nfsroots/, and would like to copy the entire dir in the different name. $ mkdir ifc1410-ioxos-161103-rules-test $ cd ifc1410-ioxos-161103 $ sudo -E tar cf - . | (cd /export/nfsroots/ifc1410-ioxos-161103-rules-test/ && tar xBf -) Reference http://www.linuxdevcenter.com/pub/a/linux/lpt/18_16.html

  Read More

• With wget to download a directory recursively

  Computer/linux 2016. 1. 12. 01:23

  wget -e robots=off -r --no-parent --reject "index.html*" http://aaa.bbb.ccc/dic Reference - http://www.gnu.org/software/wget/manual/html_node/Robot-Exclusion.html

  Read More

• 한컴 - 한숨이 나오는 컴퓨터 환경을 만드는 회사

  Computer/linux 2014. 10. 17. 08:11

  예전에 한글과 컴퓨터를 살려보겠다고, 혼자 정품 사쓰고, 난리를 피웠던 나를 내가 후회한다. hwpx기반 2014vp를 업데이트 하면서, 정말 바보같은 기조가 바뀌나 했더니, 포멧 기술 문서 허접한거나, 공개한 표준도 결국 그냥 그런 MS에서 하는 정도 해주면 되겠지라는 생각... 리눅스 지원 뷰어를 만들었데서 살펴보니... 여전히 한컴, 너의 생각은 딱 거기까지구나. 후유.... 맥이라도 iOS라도 없었으면 너네들이 리눅스를 지원을 했겠냐만.. 64bit 리눅스 뷰어라고 내 놓은 것. deb로 패키징을 했으면, Debian 7 이 기준인듯 한데. 그런데 이런... 메세지는 정말 할말이 없다. hwpviewer: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.1..

  Read More