linux 命令助记

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uname -a

kernel version:

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uname -r

see hardware info.

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cat /proc/meminfo cat /proc/cpuinfo

count line

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find . -name '\*.c' | xargs wc -l {}\;

yum remove without dependency

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sudo rpm -e --nodeps vim-common-7.4.160-1.el7.x86_64

fio test

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sudo /usr/local/bin/fio --filename=/dev/sda --direct=1 --rw=randrw --refill_buffers --norandommap --randrepeat=0 --ioengine=libaio --bs=4k --rwmixread=100 --iodepth=16 --numjobs=16 --runtime=1000 --group_reporting --name=4ktest

docker expose port to host machine

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docker run -p 8080:3000 my-image

docker get running container bash cmd

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docker  exec -it contained  bash

tcpdump

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sudo tcpdump -i any port 9200  -w o.pcap

批量结束进程

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kill -9 `ps -ef|grep nginx|grep -v grep |awk '{print $2}'`

查看进程占用端口

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ps -ef | grep processname
netstat -nap | grep pid

lsof -i:9090
pwdx 9090
lsof -P 9090 | grep cwd

vim replace

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:  %s/\(randrecord\.get('ip')\)/ptest\.\1/g

将文件中的所有 randrecord.get(‘ip’) 替换为 test.randrecord.get(‘ip’)，即使用 \1 \2 等可以匹配前面第几个括号内的内容，此括号需要使用 反斜杠 转意

查看 glibc 版本

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strings /lib64/libc.so.6 |grep GLIBC

linux 将标出输出重定向到 /dev/null

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2>& 1

awk 打印奇偶行

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awk '{print $0 > NR%2}'  file

sort by frequence

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cat tmp.txt| sort | uniq -c | sort -k1,1nr  | head -30 > stoplist.txt

filter by stoplist

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tr ' ' '\n' < stoplist.txt | grep -vwFf - tmp.txt

字符串拼接

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ps -ef | grep zicogo | awk 'BEGIN{sum=""}{sum=($2","sum)}END{print sum}'

按组统计求和

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awk '{s[$1] += $2; a[$1] += $3 }END{ for(i in s){  printf "%-50s %-20d %-20d\n", i,s[i],a[i] } }' upstats-2017-07-05-15-05.log+

查看某个库的版本号

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ldconfig -p | grep libssl

删除 archlinux 软件包

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pacman -Scc

history clean

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cat .zsh_history  |  awk 'BEGIN{FS=""}{if (NF > 40 ) print ;}' >> .zsh_history_new

brew install

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brew install vim --with-lua --with-override-system-vi  --build-from-source

global floder sed

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sed -i "s/TINY/NOX/g" `grep -R TINY -rl ./`

批量查找替换

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find CHANGELOG.md -type f -exec vim +"retab | wq" {} \;

查看用户所属组

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id -g -n $whoami

列出 osx 系统的 java 版本

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/usr/libexec/java_home -V

列出 java 的信任证书

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keytool -list -keystore /Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home/jre/lib/security/cacerts

java 导入证书

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keytool -import -trustcacerts -file [certificate] -alias [alias] -keystore $JAVA_HOME/lib/security/cacerts

vim highlight

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:so $VIMRUNTIME/syntax/hitest.vim

check cpu info

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sudo dmidecode -t 4 | grep -E 'Socket Designation|Count'
    Socket Designation: CPU1
    Core Count: 8
    Thread Count: 16
    Socket Designation: CPU2
    Core Count: 8
    Thread Count: 16

lscpu

awk 和 grep 日志统计分析

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cat nginx/logs/access.log  |   grep "17/Sep"  | grep -v '2\.43' | awk  '{if ($11 > 1) print $0}'
cat nginx/logs/access.log  |   grep "17/Sep" | grep -v '2\.43' | awk  'BEGIN{a=0}{if ($11>0+a) a=$11} END{print a}'

centos 查看某个库是哪个 package 提供的

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yum whatprovides libpci.so.3

查看 PPID

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