Administrator shell script
Technorati tag: shell,df,sed,awk
-Monitoring system statistics
Monitor disk free space
Disk resource utilization
Monitor CPU and memory usage
-perform backup
Archived data file
Store backup files offline
Monitor system statistics
Monitor disk free space
This shell script monitors the free disk space on a specific volume, such as /, and sends an email message when the free disk space falls below the set threshold.
#! / bin/bash# monitor available disk space# Note format variable = `value `value `SPACE= `df | sed-n'/\ / $/ p' | gawk'{print $5}'| sed's thenecho'if [$SPACE-ge 20] thenecho "Disk space on root at $SPACE% used" | mail-s "Disk warning" elseecho "Disk space on root is OK" fi
Add a task schedule
How often you run this script depends on the activity of the file server. Small space, once a day.
# Mini, 12 30300 every morning * / root/diskmon# large, 4 times a day, 12 30 30 12:30 in the afternoon and 4pm in the afternoon 30300 zero eight 12print 16 * / root/diskmon user disk usage #! / bin/bash# calculate disk usage and report per userTEMP= `mktemp-t tmp.XXXXXX`du-s / home/* | grep-v lost | sed's /\ / home\ /'| sort-g-r > $TEMPTOTAL= `du-s / home | gawk'{print $1} '`cat $TEMP | gawk-v n = "$TOTAL"' BEGIN {print "Total Disk Useage by User" print "User\ tSpace\ tPercent"} {printf "% s\ t% d\ t% 6.2f%\ n", $2 $1, ($1Association) * 100} END {print "-" Printf "Total\ t% d\ n", n}'rm-f $TEMP results as follows [root@docker1 ~] #. / diskhogs.shTotal Disk Useage by UserUser Space Percentbenny 3704 99.68%test 12 0.32%--Total 3716 monitors CPU and memory usage
Capture script
#! / bin/bash# script to capture system statisticsOUTFILE=/root/capstats.csvDATE= `date +% m/%d/% Y`TIME = `date +% print% M:% S`TIMEOUT = `uptime`VMOUT = `vmstat 12`USERS = `echo $TIMEOUT | awk'{print $4} '`LOAD= `echo $TIMEOUT | awk' {print $9}'| sed's / / / '`FREE=' echo "$VMOUT" | sed-n'/ [0-9] / p' | sed-n '2p' | awk' {print $4} '`IDLE= `echo "$VMOUT" | sed-n' / [0-9] / p' | sed-n '2p' | awk' {print $15} '`echo "$DATE,$TIME,$USERS,$LOAD,$FREE,$IDLE" > $OUTFILE results are as follows: [root@docker1 ~] # cat capstats.csv 12and112016, 0RAP09R02En2 0.04LoadFree Memory%CPU Idle 183360100 output html format #! / bin/bash# parse capstats data into daily reportFILE=/root/capstats.csvTEMP=/root/capstats.htmlMAIL=which muttDATE= `date + "% AMagi% BMague% dMague% Y" `echo "Report for $DATE" > $TEMPecho "> > $TEMPecho" DateTimeUsers "> > $TEMPecho" LoadFree Memory%CPU Idle "> > $TEMPcat $FILE | awk-F,'{printf"% s%s%s ", $1meme 2meme 3 Printf "% s%s%s\ n\ n", $4 Stat report for 5 DATE 6;}'> > $TEMPecho "> > $TEMP$MAIL-a $TEMP-s" Stat report for $DATE "root
< /dev/null#rm -f $TEMP结果如下 执行备份 使用shell脚本备份系统上数据的两种不同的方法。 · 1）归档数据文件 必需函数 tar命令 tar命令用于将整个目录归档为单个文件。 tar -cf archive.tar /root/test 2>/ dev/null
Create daily archives
#! / bin/bash# archive a working diretoryDATE= `date +% y% m% d`File = archive$DATESOURCE=/root/testDESTINATION=/root/archive/$FILEtar-cf $DESTINATION $SOURCE 2 > / dev/nullgzip $DESTINATION
Create an hourly archive script
#! / bin/bash# archive a working diretory hourlyDAY= `date +% d`Mont = `date +% m`TIME = `date +% k% M`SOURCE = / root/testBASEDEST=/root/archivemkdir-p $BASEDEST/$MONTH/$DAYDESTINATION=$BASEDEST/$MONTH/$DAY/archive$TIMEtar-cf $DESTINATION $SOURCE 2 > / dev/nullgzip $DESTINATION
Can be combined with cron
2) offline storage of backup files
Working directory archives can be sent in the form of email attachments
#! / bin/bash# archive a working directory and e-mail it outMAIL= `which mutt`DATE = `date +% y% m% d`File = archive$DATESOURCE=/root/testDESTINATION=/root/archive/$FILEZIPFILE=$DESTINATION.ziptar-cf $DESTINATION$ SOURCE 2 > / dev/nullzip $ZIPFILE $DESTINATIONrm-f $DESTINATION$MAIL-a $ZIPFILE-s "Archive for $DATE" root@docker1.com < / dev/null
PS: df sed awk
