adduser {user}
sudo visudo  # sudo 권한 부여, 사용자 추가하고 root와 동일하게 설정

• 참고
  • http://firstboos.tistory.com/entry/sudo-user-%EC%B6%94%EA%B0%80
  • http://south10.tistory.com/entry/%EC%9A%B0%EB%B6%84%ED%88%AC-%EC%9D%BC%EB%B0%98-%EC%82%AC%EC%9A%A9%EC%9E%90-sudo-%EA%B6%8C%ED%95%9C-%EC%A3%BC%EA%B8%B0

{executable} &

multiprocessing, queue를 사용할 때, 너무 많은 파일이 열려있다는 메시지가 나오는 경우 이것을 증가시키면 해결가능

ulimit -n  # 현재 동시에 열 수 있는 파일의 개수
ulimit -n {n_fd}  # n_fd로 동시에 열 수 있는 파일의 개수를 설정
ulimit -n 65536

현재 열려있는 파일 개수 확인

• https://stackoverflow.com/questions/2023608/check-what-files-are-open-in-python/7142094

def get_open_fds():
    import subprocess
    import os
 
    pid = os.getpid()
    procs = subprocess.check_output(["lsof", '-w', '-Ff', "-p", str(pid)])
    procs = procs.decode('utf-8')
    nprocs = sum([1 for s in procs.split('\n') if s and s[0] == 'f' and s[1:].isdigit()])
    return nprocs

gnome-desktop-item-edit ~/.local/share/applications/ --create-new

sudo apt-get install indicator-multiload

명령어들을 &&로 연결하면 앞의 명령이 성공하면 뒤의 명령을 실행한다. ||로 연결하면 앞의 명령이 실패했을 때 뒤의 명령을 실행한다.

sudo apt update && sudo apt upgrade

(compiz 설치 후)

1. CCSM –> 접근성 –> Enhanced Zoom Desktop
2. Zoom in Button선택 –> Super + Button4(마우스 휠 위로)
3. Zoom out Button선택 –> Super + Button5(마우스 휠 아래로)

# 무선랜/블루투스 활성화 여부 확인
sudo rfkill list 

# 활성화 
sudo rfkill unblock all 

• https://ubuntuforums.org/showthread.php?t=1781350

nohup xxx.sh

http://changpd.blogspot.kr/2013/04/linux-nohup-xxxsh.html

screen
tmux

hostnamectl set-hostname 'new-hostname'

또는

/etc/hosts와 /etc/hostname 에서 이름 변경 후 sudo service hostname restart

http://askubuntu.com/questions/9540/how-do-i-change-the-computer-name

sudo apt-get -m --reinstall install python python-minimal dh-python
sudo apt-get -f install

• http://askubuntu.com/questions/546472/can-anyone-help-me-with-this-i-am-not-able-to-remove-or-re-install-software-cen

~/.config/autostart 에 복사

/etc/network/interfaces 수정

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
 
source /etc/network/interfaces.d/*
 
# The loopback network interface
auto lo
iface lo inet loopback
 
# The primary network interface
auto enp0s25
#iface enp0s25 inet dhcp
iface enp0s25 inet static
        address 192.168.0.105
        netmask 255.255.255.0
        gateway 192.168.0.1
        dns-nameservers 210.220.163.82 210.107.239.131 211.47.128.1 8.8.8.8 8.8.4.4

dpkg-reconfigure lightdm

mbw {array size}

• http://goproprada.tistory.com/198
• 쓰기권한이 없을 때
  • https://unix.stackexchange.com/questions/68079/mount-cifs-network-drive-write-permissions-and-chown
• mount error(112): Host is down
  • https://kldp.org/node/140349

• https://rufus.ie/

압축

tar -cvf --keep-directory-symlink {file}.tar {dir}

해체

?

$ taskset -c 0 {명령어}  # 0번 cpu core 사용
 
# -c 예제: 0,5,7,9-11

• http://coffeenix.net/board_view.php?bd_code=1702

• 방화벽 뒤에서 add-apt-repository 명령을 실행할 수 없을 때
  • https://gist.github.com/maciakl/4531580

# 방화벽 뒤에서 접속 시도
ubuntu@sc-2-master:~$ sudo add-apt-repository ppa:greymd/tmux-xpanes
 deb package for tmux-xpanes (https://github.com/greymd/tmux-xpanes).
 More info: https://launchpad.net/~greymd/+archive/ubuntu/tmux-xpanes
Press [ENTER] to continue or ctrl-c to cancel adding it
 
gpg: keyring `/tmp/tmpwn1du2ob/secring.gpg' created
gpg: keyring `/tmp/tmpwn1du2ob/pubring.gpg' created
gpg: requesting key 28C3BA9D from hkp server keyserver.ubuntu.com
Error: retrieving gpg key timed out.
^C
gpg: Interrupt caught ... exiting
Exception ignored in: <module 'threading' from '/usr/lib/python3.5/threading.py'>
Traceback (most recent call last):
  File "/usr/lib/python3.5/threading.py", line 1288, in _shutdown
    t.join()
  File "/usr/lib/python3.5/threading.py", line 1054, in join
    self._wait_for_tstate_lock()
  File "/usr/lib/python3.5/threading.py", line 1070, in _wait_for_tstate_lock
    elif lock.acquire(block, timeout):
KeyboardInterrupt
 
# 실패후, 키(28C3BA9D)를 아래 명령으로 요청
ubuntu@sc-2-master:~$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 28C3BA9D
Executing: /tmp/tmp.JvNHe1znyd/gpg.1.sh --keyserver
hkp://keyserver.ubuntu.com:80
--recv-keys
28C3BA9D
gpg: requesting key 28C3BA9D from hkp server keyserver.ubuntu.com
gpg: key 28C3BA9D: public key "Launchpad PPA for greymd" imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)