February 2007 Archives

Run cron jobs at last day of the month

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for Linux
0 8 28-31 * * [ `date -d tomorrow +\%e` -eq 1 ] && do-something

for other Unix,BSD
0 8 28-31 * * [ `echo \`cal\` | awk '{print $NF}'` -eq 1 ] && do-something

More, run cron jobs at last workday of the month
0 8 26-31 * * root [ `echo \`cal | cut -d' ' -f2-6\` | awk '{print $NF}'` -eq `date +%e` ] && do-something

ref. 系统管理員工具包: 時間和事件管理

Virtual PC 2007

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Virtual PC 2007 Download

360安全衛士Kaspersky 合作, 提供免費的半年金鑰(Commercial key for 1 computer)
只要安裝 360安全衛士, 就可以在殺毒的頁面取得 activation code, 到期日為 2007-05-31
ref. 360安全衛士卡巴斯基激活碼獲取
2007-02-20 Update: Please DO NOT ask activation code here,
The way to get free activation code already mentioned above,
If you can't read Chinese, just forget it.

Windows Live Writer

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Windows Live Writer 是微軟出的 Blog 出版軟體, 除了支援自家的 Windows Live Spaces, 也支援 MTWordPress
這篇就是用它 Publish 的.
1.0 Beta Download
最神奇的是它竟然也支援對手 Blogger

MySQL OPTIMIZE TABLE

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MySQL 在刪除資料時, 並不會釋放出磁碟空間,
當刪除很多資料時, 可以用 OPTIMIZE TABLE 來把資料 defrag 一下, 並且會釋放出磁碟空間.
OPTIMIZE TABLE tbl_name

Wireshark 0.99.5

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Wireshark 0.99.5 Released (Feb 1, 2007)
這一版封包可以即時秀出來, 不用等到按 Stop.
註: Wireshark 的前身是 Ethereal
Ethereal 的主要開發人員 Gerald Combs 從 NIS 跳槽到 CACE, 但 Ethereal 是 NIS 公司的商標,
所以 Gerald Combs 只好將這個計畫的名稱改名為 Wireshark
ref. HowtoUseEthereal
2007-02-07 Update: 原來 Live Packet 的功能本來就有, 只是這版預設打開

Bind up/down arrow key to BASH history-search

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在 ~/.bashrc 或 /etc/bashrc 加入以下兩行
bind '"\x1b\x5b\x41":history-search-backward'
bind '"\x1b\x5b\x42":history-search-forward'
這樣就可以鍵入 command prefix + 上下鍵做 history search, 很方便.
感謝 zxvc 提供
ref. [心得] 好用的bash history function

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