This maybe you delete the shared lib file soft link. So must execute a system command to rebuild the...
Linux
Zbar parse the qrcode
Python can use zbar lib parse the qrcode information, There shows how to install the zbar lib and py...
Mysql master slave sync error: the slave’s relay log is corrupted
If the disk space is not enough, the mysql will not be login or the slave can't to write any data. I...
Linux
Accelerating DNS parsing with pdnsd
Pdnsd is a good DNS parsing software in linux system. Compared with bind and dnsmasq, pdnsd has one ...
Mysql delete the duplicate records, leave only one record
Here I will give a good SQL statement, it can delete the duplicate records and leave the min id reco...
Python
Install pycurl problems
install pycurl with problems curl-config and ssl libs In centos 7 and python 3.6 environment, instal...
Python html escape and unescape
Python escape or unescape html special words methods. 1、The cgi module that comes with Python has an...
MYSQL date function: TO_DAYS() and FROM_DAYS()
1、to_days(date), change the date to a integer number days. mysql> SELECT TO_DAYS(950501); -> 728779 ...
Python
Tornado asynchronous web request client example
Tornado is a python web Server, which is better for solving long connection request or IO asynchrono...
mongodb update command($inc/$set/$unset/$push/$pop/upsert/save)
In addition to replacement, only partial updates are needed for one or more documents. Atomic update...