command collection

by Ray Sun — on  ,  ,  , 

Troubleshooting

No. problem solution
1 missing tray icon when closing skype sudo apt-get install sni-qt:i386
2 fix dependencies sudo apt-get install -f
3 lookup all files grep -r “regular expression” *
4 CANNOT change pwd [recovery mode] mount -rw -o remount /
5 Create boot USB in linux sudo apt-get install unetbootin
6 Mount read-only dev mount -t ntfs-3g /dev/sda2 /mnt/ -ro force
7 Cannot resolve DNS cat /etc/resolv.conf
    # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
    # DO NOT EDIT THIS FILE BY HAND – YOUR CHANGES WILL BE OVERWRIT
  solution 1 /etc/network/interfaces
  solution 1 # Add Google DNS && reboot && the servername appears in /etc/resolv.conf
  solution 1 dns-nameservers 8.8.8.8
  solution 2 /etc/resolvconf/resolv.conf.d/base
  solution 2 # Add DNS
  solution 2 nameserver 8.8.8.8
  solution 2 nameserver 8.8.4.4
  solution 2 resolvconf -u
  CentOS /etc/resolv.conf
  CentOS nameserver 8.8.8.8 & nameserver 8.8.4.4 & nameserver 114.114.114.114
8 Docker: FATA[0000] sudo service docker restart
9 set up ~/bin vim /etc/environment
10 update core with cmd sudo apt-get dist-upgrade
11 check system info uname -a && cat /etc/lsb-release
12 ubuntu mp3 plugin sudo apt-get install ubuntu-restricted-extras
13 Step 1: format USB sudo umount /media/[name]/dev
  Step 2: format USB lsblk && sudo fdisk -l
  Step 3: format USB erase sudo dd if=/dev/zero of=/dev/sdb bs=4k && sync
  Step 4: format USB sudo mkfs.ext4 /dev/sd[x]
  Step 4: format USB sudo eject /dev/sd[x]
14 Ubuntu nameserver 1 sudo vim /etc/resolvconf/resolv.conf.d/base
  Ubuntu nameserver 2 nameserver 114.114.114.114
  Ubuntu nameserver 3 sudo service resolvconf restart

Problem 9: Docker: FATA[0000] Get http:///var/run/docker.sock/v1.18/version: dial unix /var/run/docker.sock: no such file or directory. Are you trying to connect to a TLS-enabled daemon without TLS?

Command

sudo command without pwd

sudo cat /etc/sudoers

#   add lines in the end of the file

ray ALL=(ALL) NOPASSWD: ALL
%sudo ALL=(ALL) NOPASSWD: ALL

#   ray is a user
#   %sudo refers to a group

check system status

#  memory
svmon -G

# cpu
topas

# ip route
traceroute xxxxx.cn.dst.com

adduser

sudo adduser ray
sudo groupadd －g 1002 www-owner
sudo usermod -g www-owner ray
chgrp -R www-owner *

Update sources

sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup
sudo gedit /etc/apt/sources.list

Hash Sum mismatch

sudo rm -fr /var/lib/apt/lists/*
sudo mkdir /var/lib/apt/lists/partial
sudo apt-get clean
sudo apt-get update --fix-missing

grep -NUM => print NUM lines of leading and tailling context

grep -5 -r "xdebug.remote_port" /etc/php5/

fallback theme

sudo apt-get install gnome-session-flashback

proxy

hkce01.hk.ibm.com 80

SSH

Download ssh client

sudo apt-get install openssh-client
ssh-keygen -t rsa

Docker

Install docker

apt-get install docker.io

启动服务和守护进程

service docker.io status
service docker.io start

创建软连接

ln -sf /usr/bin/docker.io /usr/local/bin/docker

import docker

cat ubuntu14.tar | sudo docker import - ray/ubuntu14
sudo docker images

run docker container

docker run -d  --dns 8.8.8.8 --dns 8.8.4.4  -p 80:80 -p 9200:9200 -p 50000:50000 -v /home/ray/www:/home/ray/www --name=ibmsc -h SC ray/ubuntu14 /bin/bash -c "while true;do sleep 1000; done"

start a docker container

sudo docker start ibmsc
login-docker.sh ibmsc

export docker image

sudo docker ps -a
sudo docker export 7691a814370e > ubuntu14.tar

remove docker images

docker stop $(docker ps -a -q)
sudo docker rmi -f 87bce9b2c54c

reomve all container

docker rm $(docker ps -a -q)

remove a image

docker rmi <image id>

remove all images

docker rmi $(docker images -q)

setup Docker ubuntu apache2

# 1. DocumentRoot

cd /etc/apache2/sites-enabled/
vim 000-default
    --1. DocumentRoot /home/ray/www
    --2. <Directory /home/ray/www>

# 2. setup localhost & port

vim /etc/apache2/ports.conf
    --1. ServerName 127.0.0.1
    --2. Listen 80

Change apache runner

/etc/apache2/envvars
envvars:export APACHE_RUN_GROUP=www-data

php

install php

apt-get install php5

check an attribute. grep -NUM => print NUM lines of leading and tailling context

grep -5 -r "xdebug.remote_port" /etc/php5/

file: /etc/php5/mods-available/xdebug.ini

/etc/php5/mods-available/xdebug.ini-zend_extension=xdebug.so
/etc/php5/mods-available/xdebug.ini-[Xdebug]
/etc/php5/mods-available/xdebug.ini-xdebug.remote_enable = On
/etc/php5/mods-available/xdebug.ini-xdebug.idekey = "phpstorm-key"
/etc/php5/mods-available/xdebug.ini-xdebug.remote_autostart = 1
/etc/php5/mods-available/xdebug.ini-xdebug.remote_connect_back = 1
/etc/php5/mods-available/xdebug.ini-xdebug.remote_handler=dbgp
/etc/php5/mods-available/xdebug.ini:xdebug.remote_port=9001
/etc/php5/mods-available/xdebug.ini-xdebug.var_display_max_children=128
/etc/php5/mods-available/xdebug.ini-xdebug.var_display_max_data=512
/etc/php5/mods-available/xdebug.ini-xdebug.var_display_max_depth=5