Monitoring whether the page has changed

Md5 encoded using the curl transformation, scripted page to see if there is a change

 

 

 

! # / bin / the bash 

# writing the first value 
Result = -k -s www.baidu.com curl `| the md5sum | awk '{the FS =" "}' '. 1} {Print $'` 
IF [-e File ! -a -s file]; the then 
echo "True:" $ >> the Result file 
#exit 0 
fi 
# read the file contains a line last keyword, compared with the current value, if not the same as the police, and the current the value written into the file 
last_line `egrep =" True "-NR file | awk 'the BEGIN {the FS =": "}' '. 3 the END {Print $}'` 
result_now = -k -s www.baidu.com curl `| the md5sum | awk '{the FS = ""}' '. 1} {Print $' ` 

IF [$ result_now == $ last_line]; the then 
echo" the OK " 
echo" True: "$ result_now >> File 
#exit 0 
the else 
echo" NO " 
echo" Flase: "$ result_now >>file 
#exit one 
be