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Shell #
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Shell is a user interface for access to an Operating system's services.

  • Unix shell
  • Windows shell
    • cmd

관련정보 #

  1. http://explainshell.com : 쉘 명령어를 입력하면 상세한 도움말
  2. Shell tricks for one-liner bioinformatics

기사 및 포스트 #

Useful tools #

Useful shell commands #

Refer to this link

압축률 조정 #

# tar cvf file_name.tar /home | gzip -9 > file_name.tar.gz

여기서 -9는 느리지만 압출률이 좋고, -1은 빠르지만 압축률이 나쁘다.

Too many open files #

# ulimit -a
# ulimit -Hn 10240
# ulimit -Sn 10240
# ulimit -a

Hard link #

How to find and delete all hard links to a file 2008-09-02

sudo로 명령하니 PATH가 안잡힘 #

$ vi .bashrc
alias sudo='sudo env PATH=$PATH'

pip 일괄 업데이트 #

$ vi .zshrc
alias pip-update="pip3 freeze --local | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 pip install -U"

시스템 느릴 때 점검 #

$ vmstat -1  # memory, IO, CPU 확인
$ netstat -nap | grep :80 | grep EST | wc -l    # 웹 접속 수 확인

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