Software: January 2012 Archives

Insync 是個 Google Docs 的本機端同步程式,
把它想成 Dropbox for Google Docs 就對了,
Insync 介面跟 Dropbox 很類似, 使用上幾乎一樣, 也可以灌在多台電腦,
雲端空間就是自己的 Google 帳號, 免費空間是 1G
Google 文件的檔案大小限制
付費空間部份
20 GB - 每年美金 $5 元
80 GB - 每年美金 $20 元
200 GB - 每年美金 $50 元
400 GB - 每年美金 $100 元
1 TB - 每年美金 $256 元
2 TB - 每年美金 $512 元
4 TB - 每年美金 $1024 元
8 TB - 每年美金 $2048 元
16 TB - 每年美金 $4096 元
比 Dropbox 便宜多了(Dropbox 50G $99, 100G $199)
ref. 用 Insync 同步備份 Google Docs，在本機端編輯很方便

tcping 可以偵測某 TCP Port 是否有 Listen
Exit codes are:
-1: an error occured.
0: port is open
1: port is closed
2: user timeout

# tcping 192.168.6.25 80
192.168.6.25 port 80 open.
# tcping 192.168.6.254 25
192.168.6.25 port 25 closed.

Windows 版的 tcping 還可以計算的回應時間, 跟 ping 的輸出類似
D:\>tcping 192.168.6.25 80

Probing 192.168.6.25:80/tcp - Port is open - time=5.341ms
Probing 192.168.6.25:80/tcp - Port is open - time=1.119ms
Probing 192.168.6.25:80/tcp - Port is open - time=1.132ms
Probing 192.168.6.25:80/tcp - Port is open - time=1.160ms

Ping statistics for 192.168.6.25:80
4 probes sent.
4 successful, 0 failed.
Approximate trip times in milli-seconds:
Minimum = 1.119ms, Maximum = 5.341ms, Average = 2.188ms

D:\>tcping 192.168.6.25 25

Probing 192.168.6.25:25/tcp - Socket is not connected (10057) - time=2004.628ms
Probing 192.168.6.25:25/tcp - Socket is not connected (10057) - time=2000.934ms
Probing 192.168.6.25:25/tcp - Socket is not connected (10057) - time=2001.002ms
Probing 192.168.6.25:25/tcp - Socket is not connected (10057) - time=2000.867ms

Ping statistics for 192.168.6.25:25
4 probes sent.
0 successful, 4 failed.
Was unable to connect, cannot provide trip statistics.