linux FAQ(zz)
Ans : $echo $shell
2.Which is the command used to view the environment variables?
Ans: printenv
3. How do you recall last command from the history list in Cshell ?
Ans: !!
4. How do you print the current job in Cshell ?
Ans: %%
5. Which is the command used to find the no of bytes in the file shell ?
Ans: du file name
6. Which is the command used to edits the input stream, line by line?
Ans: sed
7. What is the difference between finger and who?
Ans: Finger was a way to get information about a user from another system Who is used to find who all are using current machine.
8. Which are the Protocols used to access remote machines?
Ans: SSH ,RSH ,FTP
9. Which is the basic command while transfer a file from your home to the other user?
Ans: FTP
10. Which is command used to create a file Linus of zero bytes?
Ans: touch
11. Which is the command used to select parts of a line?
Ans: cut filename
12. How do you Find the free space of the hard disk in your home?
Ans: df filename
Ans: cmp file A file B
14. Which is the command used to find the number of files in directory?
Ans: ls | wc -l
15. How will you change your shell?
Ans: tcsh
16. How will you change file permissions?
Ans: using chmod
17. Difference between find and locate?
Ans: Locate uses an internal database to look up indexed files. This database need to be updated using a command “updatedb”.
Find does only a normal search.
18. How will you search for a pattern
(String) in a file?
Ans: grep “string” filename
19. How will you kill a process? Give one
example?
Ans: 1. ps = It will list all processes on
that shells
2. kill process ID
20. How will you remove a file
interactively?
Ans: rm -i filename
21. Can we remove a nonempty directory? If
yes how?
Ans: rm -rf dirname
22. What do you mean by “su”? What is the
difference between “su” and “su -“?
Ans:su means switch user it changes the
shell we to key a exit to come back to previous shell.
23. How will you delete 50 lines in
vi?
Ans:50 dd in escape mode.
24. How will you search for a pattern in
vi?
Ans: ?pattern
25. How will you perform cut and paste in
vi?
Ans: dd for cut p for paste
26. How to list out the files in a
directory according to there size?
Ans: ls -S
27. How to insert a word as firstword for
all lines in the text?
Ans : sed -i s/word/firstword/
Ans : C
Ans : C
Ans : C
Ans : B
32. Which of the following characters is
used to signify the end of a line?
A. %
B.
$
C.
^
D.
~
Ans : B
Ans : B
Ans : D
Ans : D
Ans : B
Ans : B
Ans : A
Ans : C
40. Which of the following utilities
processes most quickly?
A. grep B. egrep C. fgrep
Ans : The fgrep utility does not have the
same regular expression set as the other two, and is thus able to
execute the fastest hence ans is C.
Ans : B
Ans : D
43. Which is the command used to create
chain of directories?
Ans : mkdir -p dir1/dir2/dir3
44. Which is the command used to see two
files at a time?
Ans : vim -o filename1
filename2
45. What is the usage of top
command?
Ans : It will list all the currently
running processes on CPU.
46. How we can use a sed command as a head
command?
Ans : sed “5q” filename
47. What is the result of
“%s/Kacper/Kacpertech/g “?
Ans : Kacper will get replaced my another
string Kacpertech in all the lines of the file.
Ans : C
49. Write a syntax for foreach loop in
shell script?
Ans : foreach variable name (some
list)
command1
command2
.........
end
50. How we can set the date and time for
the files?
Ans : using touch operator
linux FAQ(zz)的更多相关文章
- perl FAQ(zz)
1. Why do you write a program in Perl? Ans : Easy to use and fast execution since perl script underg ...
- comp.lang.javascript FAQ [zz]
comp.lang.javascript FAQ Version 32.2, Updated 2010-10-08, by Garrett Smith FAQ Notes 1 Meta-FAQ met ...
- verilog FAQ(zz)
1. What is the race condition in verilog? Ans :The situation when two expressions are allowed to exe ...
- systemverilog FAQ(zz)
1. What is clocking block? Ans: Clocking block can be declared using the keywords clocking and endcl ...
- XAMPP(Linux版-x86兼容)官网下载
欢迎光临 XAMPP 的 Linux 版 (x86 兼容处理器版)顺便提一下:该软件以前被称作 LAMPP,但为了避免误解,我们将其重名命为 »XAMPP 的 Linux 版«.所以,如果您在寻找 L ...
- linux xampp常见问题
一.常见问题 1.安装xampp4linux后,只能本机(http://localhost)访问,局域网内其他机器无法访问 解答:在/opt/lampp/etc中修改httpd.conf,将Liste ...
- XAMPP for Linux
XAMPP 的 Linux 版图片集锦 安装过程仅 4 个步骤 步骤 1:下载 XAMPP PHP 5.4 XAMPP PHP 5.5 步骤 2:安装 步骤 3:开始运行 步骤 4:测试 使 ...
- [笔记]The Linux command line
Notes on The Linux Command Line (by W. E. Shotts Jr.) edited by Gopher 感觉博客园是不是搞了什么CSS在里头--在博客园显示效果挺 ...
- Manual | BSD手册| Linux手册 | 数据库手册 | 编程开发手册 | WEB开发手册 | 软件应用手册 | 网络技术手册 | GNU手册
豆豆手册 □ BSD手册 □ Linux手册 □ 数据库手册 □ 编程开发手册 □ WEB开发手册 □ 软件应用手册 □ 网络技术手册 □ GNU手册 在线手册 首 页 BSD手册 ·FreeBS ...
随机推荐
- apt-update 更新失败 (无法连接到ubuntu服务器)
解决方法: 找一个可以更新的系统,拷贝里面的sources.list文件,并将原系统的sources.list进行备份.
- python按行读取apk中版本号、包名等信息
主要是读apk中manifest.xml中的信息. 读单一apk信息:见“文件”中“apkInfo.xml”.实际运行时,需要将后缀由“.xml”改为“.py". 批量自动获取apk软件信息 ...
- Python---copy()、deepcopy()与赋值的区别
copy()与deepcopy()之间的主要区别是python对数据的存储方式. 首先直接上结论: —–深复制,即将被复制对象完全再复制一遍作为独立的新个体单独存在.所以改变原有被复制对象不会对已经复 ...
- php里面用魔术方法和匿名函数闭包函数动态的给类里面添加方法
1.认识 __set (在给不可访问属性赋值时,__set() 会被调用) 也就是说你再访问一个类里面没有的属性,会出发这个方法 class A{ private $aa = '11'; publ ...
- const_cast去除const限制,同一片内存
本质很简单,但一些优化 和 编程上的错误,却让人看不清本质. :const_cast<type_id> (expression) 该运算符用来修改类型的const或volatile属性.除 ...
- Android小应用之拨号器
首先看一下Android Studio下怎么设置应用的ICON Activity的onCreate()方法 当界面刚被创建时会回调此方法,super.onCreate()执行父类的初始化操作,必须要加 ...
- kafka官方Quick Start
1.下载kafka,并上传到服务器 2.如果之前没安装zookeeper,这里可以启动一个简单的zookeeper bin/zookeeper-server-start.sh config/zooke ...
- Android Studio导入eclipse工程(引用多个其它工程)
eclipse工程向android studio 迁移过程中需要到编译错误: eclipse工程的结构比较复杂,引用了其它的工程,在迁移的过程中遇到了错误. @ViewInject(R.id.edit ...
- JSP 与 PHP、ASP、ASP.NET 等语言类似,运行在服务端的语言。
JSP(全称Java Server Pages)是由 Sun Microsystems 公司倡导和许多公司参与共同创建的一种使软件开发者可以响应客户端请求,而动态生成 HTML.XML 或其他格式文档 ...
- iOS 7 修改默认布局从status bar 底部开始
最近在对公司的一个老项目进行版本升级,添加了导航栏和tabBar,并且在个人中心界面隐藏navigationBar,于是在控制器里添加了如下对象方法: - (void)viewWillAppear:( ...