SHELL训练营--day15_shell练习26-30
发布时间：2020-12-15 23:03:34 所属栏目：安全 来源：网络整理
导读：#监控mysql服务 #!/bin/bash mysql="/usr/local/mysql/bin/mysql -uroot -p123456" if $mysql -e "show processlist " /dev/null then echo "MySQL service is down." exit else $mysql -e "show slave statusG" 2/dev/null /tmp/slave.stat n=`wc -l /tmp/
#监控mysql服务 #!/bin/bash mysql="/usr/local/mysql/bin/mysql -uroot -p123456" if $mysql -e "show processlist " &>/dev/null then echo "MySQL service is down." exit else $mysql -e "show slave statusG" 2>/dev/null > /tmp/slave.stat n=`wc -l < /tmp/slave.stat` if [ $n -eq 0 ] then echo "This is master" else echo "This is slave." egrep ‘Slave_IO_Running:|Slave_SQL_Running:‘ /tmp/slave.stat |awk -F ‘:‘ ‘{print $2}‘ >/tmp/SQL.tmp if grep -qw "NO" /tmp/SQL.tmp then echo "The slave is down." fi fi fi #删除用户 #!/bin/bash if [ $# -eq 0 ] then echo "Wrong.use "bash $0 --add username",or"bash $0 --del username",or"bash $0 --help"." exit fi user_exist=0 #0用户不存在，1用户存在。 ex_user() { if ! id $1 &>/dev/null then echo "$1 not exist." user_exist=0 else user_exist=1 fi } case $1 in --add) if [ $# -eq 1 ] then echo "Wrong.use "bash $0 --add username",or"bash $0 --help"." exit else n=`echo $2 awk -F ‘,‘ ‘{print NF}‘` if [ $n -gt 1 ] then for i in `seq 1 $n` do username=`echo $2|awk -v j=$i -F ‘,‘ ‘{print $j}‘ ` ex_user $username if [ user_exist -eq 0 ] then useradd $username fi done else useradd $2 fi fi ;; --del) if [ $# -gt 2 ] then echo "Wrong.use "bash $0 --add username",‘ ‘{print $j}‘ ` ex_user $username if [ user_exist -eq 1 ] then userdel $username fi done else userdel $2 fi fi ;; --help|*) echo "use "bash $0 --add username",or"bash $0 --help"." ;; #计算和 #!/bin/bash sum=0 for i in `seq 1 100` do m=$[$i%3] if [ $m -eq 0 ] then sum=$[$sum+$i] fi done echo "和是： $sum " #加减乘除 #!/bin/bash is_num() { n=`echo $1|sed ‘s/[0-9]//g‘` if [ -n "$n" ] then echo "请输入正确数字。" fi } is_big=0 #0表示大于 big() { if [ $# -eq 2 ] then echo "请输入两个数字。" elif [ $1 -gt $2 ] then is_big=0 else is_big=1 fi } add() { sum=$[$1+$2] echo "$1+$2=$sum" } subtract() { if [ $is_big -eq 0 ] then cha=$[$1-$2] else cha=$[$2-$1] fi } multiply() { ji=$[$1*$2] } divide() { if [ $is_big -eq 0 ] then echo "scale=2;$1/$2|bc" else echo "scale=2;$2/$1|bc" fi } if [ $# -ne 2 ] then echo "需要输入两个参数。" exit else is_num $1 is_num $2 fi add $1 $2 subtract $1 $2 multiply $1 $2 divide $1 $2 #输入数字 #!/bin/bash while: do read -p "Please input a number:" n if [ -n "$n" ] then echo "请输入一个数字。" continue fi if echo $n |grep -ql ‘end‘ then exit fi n1=`echo $n| sed ‘s/[0-9]//g‘|wc -l` if [ $n1 -ne 0 ] then echo "清输入纯数字。" continue else echo "你输入的数字是：$n" fi done
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