系统

• 安装当前版本的linux-headers
  sudo apt-get install linux-headers-$(uname -r)

• 重新配置已经安装的软件包
  sudo dpkg-reconfigure dash

• find命令
  与echo, du等结合, 统计匹配目录的空间大小
  find vendor/ -name ".git" ! -path "vendor/3rdParty*" -exec echo "TDIR=\`dirname {} \` && du -sh \$TDIR" \; > test.sh && chmod a+x test.sh && ./test.sh

• 查找并kill某关键字进程
  pid=`ps -e | grep phone | sed 's/[ ][ ]*/,/g'|cut -d \, -f2`;echo $pid;kill $pid
ps aux | grep kama | grep -v grep | cut -c 10-14|xargs sudo kill -9
ps aux | grep kama | grep -v grep | awk ‘{print $1}’|xargs kill -9

• shell简单循环
  cat test.sh | while read line; do $line; done

• 保持系统唤醒
  echo "aaa" > /sys/power/wake_lock

• 改变kernel log级别
  echo 0 > /proc/sys/kernel/printk
  -vim
  删除行尾空格:
  :%s/\s\+$//
  删除行头空格:
  :%s/^\s\+//
  删除空行:
  :%g/^$/d
  将多行空行替换为一行:
  :%s/\n\{3,\}/\r\r/e
  pkgconfig路径:
  pkg-config --variable pc_path pkg-config
  添加:export PKG_CONFIG_LIBDIR=/usr/lib/pkgconfig/

网络

• ping
  ping目标主机, 指定interface ping ipv6地址
  ping6 -I usb0 ipv6.sjtu.edu.cn

• curl命令
  curl -v https://www.jianshu.com
  curl -v hostname [-d data or -d $file] 可携带要发送的数据

• 修改ip
  ifconfig em1 192.168.1.1 netmask 255.255.255.0 up

• 查看路由表
  ip路由: ip -4或ip -6查看修改对应的路由,如:
  ip -6 route list table all
  注:
  按命令级联查看对应help,如
  ip help
ip route help

• 路由策略
  ip -4或ip -6查看修改对应的路由策略,如:
  ip -6 rule

• 防火墙规则
  查看raw表规则
  iptables -nL -t raw
  添加规则
  iptables -t raw -A tetherctrl_raw_PREROUTING -s 10.0.10.0/24 -d 10.0.10.0/24 -j ACCEPT
  禁止ping本机:
  iptables -A INPUT -p icmp --icmp-type echo-request -j DROP
  (iptables可参考: https://blog.csdn.net/jon_stark/article/details/80372221)
  禁用usb0的dhcp地址更新:
  iptables -t filter -A OUTPUT -i usb0 -p udp -s 0.0.0.0 --sport 68 -d 255.255.255.255 --dport 67 -j DROP

• tcpdump抓包
  tcpdump -i any -w test.pcap

• wireshark
  (ipv6.addr eq fd00:0:20:1::4 and ipv6.addr eq fd00:0:0:2::1) and (tcp.port eq 55951 and tcp.port eq 10815)
ip.dst == 10.0.0.172
ip.addr == 10.0.0.172 and ( tcp.flags.syn == 1 or tcp.flags.fin == 1)

Git

git config --global http.sslverify false
git config --global -e

[color]
      ui = auto
[core]
      editor = vim
[commit]
      template = /home/aa1/gitmessage.txt

添加远程仓库然后rebase
git remote add local_name /data/ws/android32/frameworks/base/ 或
git remote add local_name ssh://testuser@10.x.x.y:/data/ws/android32/frameworks/base/
git fetch local_name
git rebase --onto mbase branch_a/branch_b

git show解析
列出修改文件数大于200的提交列表(包含修改文件的笔数):
git cherry -v android12 | awk '{ printf("git show %s | grep \"diff --git\" | wc -l \n",$2)}' | while read line ; do cnt=$(eval $line); if [ $cnt -gt 200 ]; then echo $line : $cnt | awk '{ printf("%s %s %s ~ %s\n",$1,$2,$3,$12)}'; fi; done;

显示修改文件数大于200的提交列表:
git cherry -v android12 | awk '{ printf("git show %s | grep \"diff --git\" | wc -l \n",$2)}' | while read line ; do cnt=$(eval $line); if [ $cnt -gt 200 ]; then echo $line | eval $(awk '{ printf("%s %s %s --pretty=oneline | head -6",$1,$2,$3)}'); fi; done;

android

• 初始化
  android tools:
  https://source.android.com/source/initializing.html

• repo forall实用例子
  列出版本间差异commit
  repo forall -p -c git log branch_a..branch_b --author='@test.com'
  列出相关提交
  repo forall -p -c 'git log --pretty=oneline --author="abc.com"' > abc_commits.txt
  清除本地修改
  repo forall -c "git reset --hard && git clean -xdf"

• lowmemorykiller
  cat /sys/module/lowmemorykiller/parameters/minfree

• dumpsys network info
  grep -rs "Switching to new default network" .
dumpsys connectivity --short | grep "Active default network"

• ndc
  ndc resolver setnetdns 100 "*" 8.8.8.8 114.114.114.114
ndc resolver clearnetdns 100

其它

• 按区域截屏
  sleep 3 && gnome-screenshot -a
  shell执行完本命令后, 迅速跳转到待截屏界面, 待光标变十字,可选择拖动区域截屏

• selinux
  generate rules
  dmesg | audit2allow -p out/target/product/a11/root/sepolicy
cat rules.txt | audit2allow

• minicom configuration (replace SecureCRT)
  http://www.cnblogs.com/pied/archive/2012/04/10/2441021.html