$?: 代表已被更新的 dependencies 的值。也就是 dependencies 中，比 targets 還新的值。
$@: 代表 targets 的值。
$<: 代表第一個 dependencies 的值。
$*: 代表 targets 所指定的檔案，但不包含副檔名。
* make -k: 會讓make在遇到錯誤的時候仍然運行，而不會停在第一個問題
* make -n: 只印出將會進行的工作，而不會真的去執行
* make -f makefile_name: 告訴make需要用那個makefile檔案。當你的make檔不是叫makefile的時候，需要自行透過-f加上你檔案名字，make才找的到你的makefile
Ref:
http://tetralet.luna.com.tw/index.php?op=ViewArticle&articleId=185&blogId=1
http://kevincrazy.pixnet.net/blog/post/29780477
http://hsian-studio.blogspot.com/2008/09/makefile_08.html
2010年11月18日
Allowing Root Logins to Telnet and FTP Services
只要編輯/etc/securetty即可
加入以下就可以讓10個session以root telnet登入
pts/0
pts/1
pts/2
pts/3
pts/4
pts/5
pts/6
pts/7
pts/8
pts/9
Ref: http://www.idevelopment.info/data/Unix/Linux/LINUX_TelnetFTPAsRoot.shtml
2010年9月12日
2010年8月16日
stdout stderr
1 - denotes stdout ( standard output )
2 - denotes stderr ( standard error )
/dev/null . apparently is null , nothing , empty , zero etc , etc .
2>/dev/null - redirect stderr to nothing , it turns stderr off.
>/dev/null 2>&1 also can write as 1>/dev/null 2>&1 - stdout redirect to /dev/null (no stdout) ,and redirect stderr to stdout (stderr gone as well) . end up it turns both stderr and stdout off
a little practice may help to undstand above .
#ls /usr /nothing
#ls /usr /nothing 2>/dev/null
#ls /usr /nothing >/dev/null 2>&1
2 - denotes stderr ( standard error )
/dev/null . apparently is null , nothing , empty , zero etc , etc .
2>/dev/null - redirect stderr to nothing , it turns stderr off.
>/dev/null 2>&1 also can write as 1>/dev/null 2>&1 - stdout redirect to /dev/null (no stdout) ,and redirect stderr to stdout (stderr gone as well) . end up it turns both stderr and stdout off
a little practice may help to undstand above .
#ls /usr /nothing
#ls /usr /nothing 2>/dev/null
#ls /usr /nothing >/dev/null 2>&1
2010年3月7日
2010年2月10日
CVS Command
Root:
#export CVSROOT=:pserver:[user name]@[server]:/share/service/cvs
Checkout:
#cvs checkout -d [folder name] -r [tag] "[server code path]"
Commit:
#cvs commit -m "[log]"
Branch:
#cvs tag -b [branch name]
Checkout Branch:
#cvs checkout -d [folder name] -r [branch name] "[server code path]"
Look Up Version:
#cvs status -v
Look Up Log:
#cvs log -S -d "2005/10/1<2005/10/3">
/*To show the headers of files in the current directory created after October 1, 2005 through the present time*/
Add Tag:
#cvs tag tag_name
checkout by tag:
#cvs co -r tag_name output_path
checkout by date:
#cvs checkout -D "mm/dd/yyyy hh:mm" -d [folder name] "[server code path]"
look changelog
#cvs2cl.pl -r
#vim ChangeLog
#export CVSROOT=:pserver:[user name]@[server]:/share/service/cvs
Checkout:
#cvs checkout -d [folder name] -r [tag] "[server code path]"
Commit:
#cvs commit -m "[log]"
Branch:
#cvs tag -b [branch name]
Checkout Branch:
#cvs checkout -d [folder name] -r [branch name] "[server code path]"
Look Up Version:
#cvs status -v
Look Up Log:
#cvs log -S -d "2005/10/1<2005/10/3">
/*To show the headers of files in the current directory created after October 1, 2005 through the present time*/
Add Tag:
#cvs tag tag_name
checkout by tag:
#cvs co -r tag_name output_path
checkout by date:
#cvs checkout -D "mm/dd/yyyy hh:mm" -d [folder name] "[server code path]"
look changelog
#cvs2cl.pl -r
#vim ChangeLog
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