July 2015 Archives

AnyDesk 是個類似 Teamviewer 的程式,
自家有一份 Benchmark Test, 表現出色
不管他有沒有老王賣瓜, 自賣自誇
實際使用起來的確比 Teamviewer 順暢
和 Teamviewer 一樣有免費及付費版, 但是不會像 Teamviewer 偵測到商業使用就限制使用時間, 甚至封鎖

wget 遇到有轉址時, save 的檔名可能會不正確
例如:
# wget http://hk1.php.net/get/php-5.6.11.tar.bz2/from/this/mirror
--2015-07-22 14:32:35-- http://hk1.php.net/get/php-5.6.11.tar.bz2/from/this/mirror
Resolving hk1.php.net... 202.67.138.74
Connecting to hk1.php.net|202.67.138.74|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://hk1.php.net/distributions/php-5.6.11.tar.bz2 [following]
--2015-07-22 14:32:35-- http://hk1.php.net/distributions/php-5.6.11.tar.bz2
Connecting to hk1.php.net|202.67.138.74|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 14081292 (13M) [application/octet-stream]
Saving to: `mirror'

加 --content-disposition 就會讓 save 的檔名是正確的
# wget --content-disposition http://hk1.php.net/get/php-5.6.11.tar.bz2/from/this/mirror
--2015-07-22 14:56:25-- http://hk1.php.net/get/php-5.6.11.tar.bz2/from/this/mirror
Resolving hk1.php.net... 202.67.138.74
Connecting to hk1.php.net|202.67.138.74|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://hk1.php.net/distributions/php-5.6.11.tar.bz2 [following]
--2015-07-22 14:56:25-- http://hk1.php.net/distributions/php-5.6.11.tar.bz2
Connecting to hk1.php.net|202.67.138.74|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 14081292 (13M) [application/octet-stream]
--2015-07-22 14:56:25-- http://hk1.php.net/distributions/php-5.6.11.tar.bz2
Reusing existing connection to hk1.php.net:80.
HTTP request sent, awaiting response... 200 OK
Length: 14081292 (13M) [application/octet-stream]
Saving to: `php-5.6.11.tar.bz2'

--content-disposition
If this is set to on, experimental (not fully-functional) support for "Content-Disposition" headers is enabled.
This can currently result in extra round-trips to the server for a "HEAD" request,
and is known to suffer from a few bugs, which is why it is not currently enabled by default.
This option is useful for some file-downloading CGI programs that use "Content-Disposition"
headers to describe what the name of a downloaded file should be.

The "-append" option appends vertically, while the plus form "+append" appends horizontally.

convert 1.jpg 2.jpg -append 1-2.jpg
convert 1.jpg 2.jpg +append 1+2.jpg

2x2 image
convert \( 1.jpg 2.jpg +append \) \( 3.jpg 4.jpg +append \) -append 1234.jpg

# whois -h whois.radb.net '!gAS15169'
輸出的結果是 BGP announce 的網段, 可以再用 netmask summary

# netmask `whois -h whois.radb.net '!gAS15169' | grep '^[0-9]'`
1.0.0.0/24
1.1.1.0/24
1.2.3.0/24
8.8.4.0/24
8.8.8.0/24
8.15.202.0/24
8.34.208.0/20
8.35.192.0/20
23.236.48.0/20
23.251.128.0/19
64.15.112.0/20
64.233.160.0/19
66.102.0.0/20
66.249.64.0/19
70.32.128.0/19
72.14.192.0/18
74.125.0.0/16
104.132.0.0/16
104.133.0.0/17
104.134.128.0/17
104.154.0.0/15
104.196.0.0/14
107.167.160.0/19
107.178.192.0/18
108.59.80.0/20
108.170.192.0/18
108.177.0.0/17
113.197.106.0/24
130.211.0.0/16
142.250.0.0/15
146.148.0.0/17
162.216.148.0/22
162.222.176.0/21
172.102.8.0/21
172.110.32.0/21
172.217.0.0/16
172.253.0.0/16
173.194.0.0/16
173.255.112.0/20
192.104.160.0/23
192.158.28.0/22
192.178.0.0/15
193.142.125.0/24
194.110.194.0/24
199.192.112.0/22
199.223.232.0/21
207.223.160.0/20
208.65.152.0/22
208.117.224.0/19
209.85.128.0/17
216.58.192.0/19
216.239.32.0/19
216.252.220.0/22

ref. Merit RADb Tutorial: Query Options

# whois -h whois.cymru.com 168.95.1.1
[Querying whois.cymru.com]
[whois.cymru.com]
AS      | IP               | AS Name
3462    | 168.95.1.1       | HINET Data Communication Business Group,TW
# whois -h whois.cymru.com 8.8.8.8
[Querying whois.cymru.com]
[whois.cymru.com]
AS      | IP               | AS Name
15169   | 8.8.8.8          | GOOGLE - Google Inc.,US

        

發現用 Apache 2.4 + PHP (any version), 用 exec 執行 ping 一個 ping 不到的 IP, 會卡住

exec("ping -c1 -w1 192.168.1.100"); // 192.168.1.100 does not exist

但是去 ping 一個 ping 得到的 IP 則正常
目前找不到解決方法, 只能用 Workaround 使用 Apache 2.2

若不習慣使用 Windows 的工作排程器, 可用 nnCron LITE
裝好後在安裝目錄有一個 cron.tab 檔, 格式跟一般的 crontab 一樣
#CRONTAB FILE
# Classic crontab format:
# Minutes Hours Days Months WeekDays Command

例如: 每分鐘都跳出記事本
* * * * * notepad.exe