学习怎样用英语写作文【一】
Dear Sir,
I am writing to seek your advice regarding which subject I should choose as my major, history or computer science. I am studying in the last year in high school now.
Next year, I hope that I will be able to enroll in your college. I began to take a special interest in history when I was a primary school student. I can still remember the historical stories my teachers told in class, so I was wondering if I should continue to study in your college. However, several days age, one of my friends told me that computer science is more popular nowadays.
As a matter of fact, many jobs need IT skills. I was advised that it’s more important to find a job than merely to satisfy personal interest. Therefore, it is now very hard for me to decide which subject I should choose. Must I give up my favorite subject and take employment need as a priority? I would be more than grateful to you if could tell me your advice about this. Your early reply would be highly appreciated.
Yours faithfully
Wang Rutao
学习怎样用英语写作文【二】
1.普通文件
文件的种类普通文件由ls –al显示出来的属性中,第一个属性为[-],例如[-rwxrwxrwx]。另外，根据文件的内容，又可分为：
学习怎样用英语写作文【三】
1.-rwxrwxrwx代表什么意思?
代表文件所属用户及所属组及其它用户均有可读可写可执行功能
其中
r：可读其值为4
w：可写其值为2
x：可执行其值为1
2.要将一个文件的属性改为-rwxr-xr--，采用什么命令
Chmod 754 文件名或chmod u=rwx,g=rx,o=r 文件名
3.若需要更改一个文件的拥有者与用户组，该用什么命令
Chown [-r] 账号名称：文件或目录
Chown [-r] 账号名称：用户组名称、文件或目录
例如：chown bin install.log
chown root:root install.log
4.显示隐藏文件
Ls –a –l
学习怎样用英语写作文【四】
[[emailprotected]~]#bc
按Q键退出
