ceiling的博客

find . -type f -print0 | xargs -0 grep -i 'text'

1、vi 替换换行符  :%s#\n#\t#g2、在行首或行尾添加内容  sed 's/^/&hellow/g' file.txt            sed 's/$/&hellow/g' file.txt 3、先查找#开头的行再删除里面包含log的行    sed -i '/^#/{/log/d}' file.txt4、正向预查  (?=local)  匹配loc...

1、echo $RANDOM2、openssl rand -base64 83、date +%s%N4、head /dev/urandom |cksum5、cat /proc/sys/kernel/random/uuid |md5sum6、（expect）mkpasswd -s 0|md5sum7、openssl rand -hex 108、 openssl rand -base64 20...

#!/bin/bash. /etc/init.d/functionsif [[ "$(whoami)" = "root" ]]; then        action "root user" /bin/trueelse        action "no root" /bin/falsefi

1. a=$((3+5)) 或 ((a=3+5))2. echo $[2+3]运算符 ++ -- + - ！ ~ * ** / % = == != > & ^ |  && || = +=3. let i=1+44. expr 2 + 2    5. expr length "hello" 计算字条长度6. seq -s + 100|bc   echo 3.3+3.4|bc

1、求和cat data|awk '{sum+=$1} END {print "Sum = ", sum}'2、求平均cat data|awk '{sum+=$1} END {print "Average = ", sum/NR}'3、求最大值cat data|awk 'BEGIN {max = 0} {if ($1>max) max=$1 fi} END {print "Ma

#!/bin/bash#remote command#date 20160821username=rootpasswd=123456usage(){        echo "Usage:sh `basename $0` -f [hostlist] -c [command]"        exit 1}while getopts ":f:c:" o

#!/bin/bashbakdir=/backup_mysql/bakdir2=/backup_mysql/mysqluser=rootpass=date=`date "+%Y%m%d%H%M"`database=`mysql -u"$user" -e "show databases" |sed 1d|grep -v schema`if [ ! -d

#!/bin/baship=$1#10to2i=`echo "obase=2;$ip" |bc`#split 2n=$[${#i}-24]d=${i:0-8:8}c=${i:0-16:8}b=${i:0-24:8}a=${i:0:$n}#2to10((a1=2#"$a"))((b1=2#"$b"))((c1=2#"$c"))((d1=2#"$d"))#r

脚本里有时候会有一些重要的信息，如用户名密码等，如果不想让别人看到可以使用gzexe进行加密1、新建脚本#vi echo.sh#!/bin/bashecho "123456"2、增加执行权限#chmod +x echo.sh3、对脚本进行加密gzexe  echo.sh4、加密后会生成一个echo.sh~源文件，echo.sh是加密后的文件#lsec

#!/bin/bash# Remote Copy file# date 20160821username=rootpasswd=123456usage(){        echo "Usage:sh `basename $0` -f [hostlist] Local_file Remote_file"        exit 1}while get