Shell scripts(Ubuntu)

gistfile1.sh

Mint
# screenlets

# Show bandwidth use oneliner
while true; do cat /proc/net/dev; sleep 1; done | awk -v dc="date \"+%T\"" '/eth0/{i = $2 - oi; o = $10 - oo; oi = $2; oo = $10; dc|getline d; close(dc); if (a++) printf "%s %8.2f KiB/s in %8.2f KiB/s out\n", d, i/1024, o/1024}'

# limit the cpu usage of a process
sudo cpulimit -p pid -l 50

# ubuntu root
sudo passwd root
sudo passwd -l root
sudo -i

update-alternatives --config x-www-browser
update-alternatives --get-selections | grep x-www-browser | sed -e 's/x-www-browser\s*auto\s*//'
browser=`update-alternatives --get-selections | grep x-www-browser | sed -e 's/x-www-browser\s*auto\s*//'`; $browser /usr/share/w3m/w3mhelp.html > /dev/null

apt-cache search package 搜索包 
apt-cache show package 获取包的相关信息，如说明、大小、版本等 
sudo apt-get install package 安装包 
sudo apt-get install package - - reinstall 重新安装包 
sudo apt-get -f install 修复安装"-f = --fix-missing" 
sudo apt-get remove package 删除包 
sudo apt-get remove package - - purge 删除包，包括删除配置文件等 
sudo apt-get update 更新源 
sudo apt-get upgrade 更新已安装的包 
sudo apt-get dist-upgrade 升级系统 
sudo apt-get build-dep package 安装相关的编译环境 
apt-get source package 下载该包的源代码 
sudo apt-get clean && sudo apt-get autoclean 清理无用的包 
sudo apt-get check 检查是否有损坏的依赖



diff .bashrc .bashrc1 > .etc/.bashrc.patch
cat .bashrc.patch | patch .bashrc
patch -N .bashrc .etc/.bashrc.patch

# Re-start System without Rebooting
Ctrl + Alt + Backspace
Alt + PrintScreen + K

useradd / userdel

# Linux 用命令行查看硬件信息@evernote
cat /proc/cpuinfo
cat /proc/meminfo
rpm -Uvh pkg.rpm

/etc/environment
/etc/hosts
/etc/passwd
# List your MACs address
cat /sys/class/net/eth0/address

F3
mkdir -p aa/bb/cc && cd $_
cd !$

# Esc + . 可以切换之前命令的参数
# !!    repeat the previous command
# !$    repeat the last argument of the previous command
# http://ss64.com/bash/history.html