? 讀取文件的時間

#!/bin/bash

for file in `ls /root`

do

stat $file>1.txt

sed -n "7p" 1.txt>2.txt

usetime= awk -F ":" ‘{print $2}‘ 2.txt

echo "time="$file $usetime

done

? 讀取文件的每行while語句。

cat afile | while read oneline

do

echo $oneline

done

? 讀取文件的每行for語句。

for i in `cat afile`

do

echo $i

done

? 自己主動加入用戶

useradd test

passwd test<<eof

111111

111111

eof

? 自己主動殺死進程

ps -a | grep ‘‘ | awk ‘{print $1}‘ | xargs -i kill 9 {}

? 保留七天的文件

#! /bin/bash

for file in `ls /orabak`

do

if [[ ${file:0:2} == "db" ]];then

fdate=${file:10:8}

mydate=`date +%Y%m%d -d "-7 day"`

if [[ $fdate < $mydate ]];then

rm -rf $file;

else

echo $file;

fi

else

fdate=${file:12:8}

mydate=`date +%Y%m%d -d "-7 day"`

if [[ $fdate < $mydate ]];then

rm -rf $file;

else

echo $file;

fi

fi

done

? 查看表的字段

su - oracle << BO

sqlplus / as sysdba<<EOF

desc user_tables;

exit;

EOF

【BASH】bash shell的使用實例