标签:info mon 需要 效果 服务 $$ src running 冒泡排序
5年前的时候,开始接触linux操作系统,接触的第一步就是学习shell脚本。用小脚本以连代学入了门。
1) 9*9乘法输出
2) 检验主机的服务是否启动
3) 冒泡排序
4) 备份当时team服务器上的dokuwili、mantis等应用。
主要目的是练习变量、for循环语句、if条件语句。
功能是输出9*9乘法
稚嫩的手法:
#!/bin/bash #Function:output 9*9 expression #Date:2011 04 21 #Version:1.0.0.0 LANG=C export LANG i=1 j=1 rst=0 for i in $(seq 1 9) do result=‘‘ for j in $(seq 1 $i) do rst=$(($i*$j)) result="$result$i*$j=$rst " j=$(($j+1)) done echo $result i=$(($i+1)) done exit 0
效果
[root@Grace ~]# ./99Plus.sh 1*1=1 2*1=2 2*2=4 3*1=3 3*2=6 3*3=9 4*1=4 4*2=8 4*3=12 4*4=16 5*1=5 5*2=10 5*3=15 5*4=20 5*5=25 6*1=6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=36 7*1=7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=49 8*1=8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=64 9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81 |
主要目的是if条件语句、``。
功能是检验主机服务是否启动,并输出对应的信息
稚嫩的手法:
#!/bin/bash #Function:using "if then" to show host‘s service. #Date:2011 04 21 #Version:1.0.0.0 #1.print the program‘s function echo "Now,the service of your linux system will be detected!" echo "the www,ftp,ssh and send mail+pop3 will be detected!" echo " " #2.www www=`netstat -an|grep LISTEN|grep :80` if [ "$www" != "" ]; then echo "WWW is running" else echo "WWW is NOT running" fi #3.ftp ftp=`netstat -an|grep LISTEN|grep :21` if [ "$ftp" != "" ]; then echo "FTP is running" else echo "FTP is NOT running" fi #4.ssh ssh=`netstat -an|grep LISTEN|grep :22` if [ "$ssh" != "" ]; then echo "SSH is running" else echo "SSH is NOT running" fi #5.smtp+pop3 smtp=`netstat -an|grep LISTEN|grep :25` pop3=`netstat -an|grep LISTEN|grep :110` if [ "$smtp" != "" ] && [ "$pop3" != "" ]; then echo "sendmail is OK!" elif [ "$smtp" != "" ] && [ "$pop3" == "" ]; then echo "sendmail have some proplems of your pop3!" elif [ "$smtp" == ""] && [ "$pop3" != "" ]; then echo "sendmail have some proplems of your SMTP!" else echo "sendmail is not running!" fi
效果
[root@Grace ~]# ./port-test.sh
|
练习参数的使用、eval、if条件语句、比较符号、for循环语句。
功能是一次性输入n个数字,请按降序输出
拙劣的手法:
#Function:asc sort #Date:2011 04 19 #Version:1.0.0.0 LANG=C export LANG #1.read numbers i=$# var[1]=0 for (( a=1; a<=$i; a=a+1 )) do eval var[$a]=\$$a done #2.sort num="" for (( a=1; a<=$i-1; a=a+1 )) do for (( j=1; j<=$i-$a; j=j+1 )) do if [ "${var[$j]}" -gt "${var[$j+1]}" ]; then num="${var[$j]}" var[$j]="${var[$j+1]}" var[$j+1]="$num" fi done done #3.output result="" for (( a=1;a<=$i-1; a=a+1 )) do result="$result${var[$a]}," done echo "$result${var[$i]}" exit 0
效果
[root@Grace ~]# ./asort.sh 8 100 9 2 0 119 19 0,2,8,9,19,100,119 [root@Grace ~]# ./asort.sh 3220 456 1000 9 0 2 10 20 98 166 0,2,9,10,20,98,456,1000,3220,32200 |
显而易见的缺点是:
没有对输入进行校验。
此外,获取值也可以使用read读取
主要目的是练习case语句、同时真的需要备份数据。
功能是
1) 备份目录 ‘data‘ 到 ‘qvbackp‘
2) 加入简单的输入校验
3) 输出备份信息
4) 备份成功的话,同时把恢复脚本写好
拙劣的手法:
#!/bin/bash #Function:backup directory ‘data‘ to dest ‘qvbackp‘ #Date:2011 04 25 #Version:1.0.0.0 declare -i count=$# # step1:backup and move backuped files to another directory case $count in "1") if [ "$1" == "--help" ] ; then echo "Usage: qvbackup.sh SOURCE-DIRECTORY DEST-DIRECTORY" echo "Backup files of SOURCE-DIRECTORY to DEST-DIRECTORY." exit else echo "Invalid parameters, make sure all parameters are correct. " exit fi ;; "2") if [ ! -d $1 ] ; then echo "No such file or directory" exit elif [ ! -d $2 ] ; then mkdir -p $2 fi srcdir=$(dirname $1) srcname=$(basename $1) destdir=$2 destname=$(basename $2) destdir="${destdir%/}/" # setp1.1:when today is the first day of the month, # the programme will move the all the backuped file # to another directory. if [ $(date +%d) == "01" ] ; then if [ $(whereis -b "$destname$(date +%d)") ] ; then pushd $(dirname $destdir) rm -rf "$destname$(date +%d)" 1>/dev/null 2>>"${destdir}qvbackup.log" popd fi pushd $(dirname $destdir) mv "$destname" "$destname$(date +%d)" mkdir -p $2 popd fi # step1.2:backup files of SOURCE-DIRECTORY to # DEST-DIRECTORY backupfile="$(date +%Y-%m-%d-%H-%M-%S)_$srcname.tgz" destfile="$destdir$backupfile" pushd $srcdir tar -g "${destdir}snapshot" -zcf $destfile $srcname 1>/dev/null 2>>"${destdir}qvbackup.log" retCode=$? popd ;; "0") echo "No parameters, please make sure." exit ;; *) echo "Too more parameters, please make sure." exit ;; esac # setp2:output backup log ,backup information and recover scripts rstMsg="" pushd $destdir if [ "$retCode" == "0" ] ; then rstMsg="$(date +%Y-%m-%d-%H-%M-%S) backup OK" echo "tar zxf $destfile">>qvrecover.sh else rstMsg="$(date +%Y-%m-%d-%H-%M-%S) backup ERROR" fi echo $rstMsg>>qvbackup.log popd echo $rstMsg exit 0
问题是
1.一直备份,但磁盘占满了怎么办,需要自动化监测磁盘使用率。
2.因为组件比较小,使用的是完全备份,是不是可以保持最近一周的不删掉或者最近的五个、十个?
标签:info mon 需要 效果 服务 $$ src running 冒泡排序
原文地址:http://www.cnblogs.com/gracejiang/p/6110546.html