This section contains Aptitude Questions and Answers on Linux Shell Commands.
本节包含有关Linux Shell命令的 Aptitude问答。
cmdtype
type
ctype
commandtype
Correct answer: 2
type
The type command is used to check a Linux command is a built-in shell command or external command.
命令类型
类型
类型
命令类型
正确答案:2
类型
type命令用于检查Linux命令是内置的shell命令还是外部命令。
pwd
cd
export
echo
Options:
A and B
C and D
A, B, and C
A, B, C, and D
Correct answer: 4
A, B, C, and D
All given commands are built-in shell commands.
密码
光盘
出口
回声
选项:
A和B
C和D
A,B和C
A,B,C和D
正确答案:4
A,B,C和D
所有给定的命令都是内置的shell命令。
cat
file
help
man
Options:
A and B
C and D
A, B, and D
A, B, C, and D
Correct answer: 3
A, B, and D
The cat, file, and man are external commands used in the Linux operating system.
猫
文件
救命
男子
选项:
A和B
C和D
A,B和D
A,B,C和D
正确答案:3
A,B和D
cat , file和man是Linux操作系统中使用的外部命令。
pcmd
which
pathcmd
None of the above
Correct answer: 2
which
The which command is used to display the path of a command in the Linux File System.
pcmd
哪一个
路径
以上都不是
正确答案:2
哪一个
which命令用于显示Linux文件系统中命令的路径。
newcmd
new
alias
aliasname
Correct answer: 3
alias
The alias command is used to assign a new name to the Linux built commands?
新命令
新
别名
别名
正确答案:3
别名
alias命令用于为Linux内置命令分配新名称?
shell +x
shell -x
set -x
set +
Correct answer: 3
set -x
The set –x command is used to enable the shell expansion.
壳+ x
壳-x
设置-x
设置+
正确答案:3
设置-x
set –x命令用于启用外壳扩展。
;
%
&&
||
Correct answer: 1
;
The semicolon (;) operator is used to executing multiple commands in a single line.
;
%
&&
||
正确答案:1
;
分号(;)运算符用于在一行中执行多个命令。
rmalias
unalias
delalias
ralials
Correct answer: 2
unalias
The unalias command is used to remove an existing alias.
rmalias
无别名
德拉利亚斯
集会
正确答案:2
无别名
unalias命令用于删除现有别名。
//
\\
/**/
#
Correct answer: 4
#
The # operator is used to comment line in a shell script file.
//
\\
/ ** /
#
正确答案:4
#
#运算符用于注释shell脚本文件中的行。
Yes
No
Correct answer: 2
No
No, the alias created by the alias command can be used after exiting from shell. We can create permanent alias by storing alias in the bash startup file.
是
没有
正确答案:2
没有
不,从shell退出后,可以使用由alias命令创建的别名 。 我们可以通过将别名存储在bash启动文件中来创建永久别名。
$?
%$
?&
[email protected]
Correct answer: 1
$?
The dollar question mark ($?) is used to store the exit code of a previous command.
$?
%$
?&
[电子邮件保护]
正确答案:1
$?
美元问号( $? )用于存储上一个命令的退出代码。
The Globbing is used to recognize the wildcard characters and then expand them into path-name.
The Globbing is also known as path-name expansion.
The File Globbing is not supported by the Linux operating system.
All the above
Options:
A and B
A and C
A, B, and C
D
Correct answer: 1
A and B
Statements A and B are correct about GLobbing in the Linux operating system.
Globbing用于识别通配符,然后将其扩展为路径名。
Globbing也称为路径名扩展。
Linux操作系统不支持File Globbing。
以上全部
选项:
A和B
A和C
A,B和C
d
正确答案:1
A和B
语句A和B关于Linux操作系统中的GLobbing是正确的。
Wildcards are the string patterns that contain some special characters.
Wildcards are used to perform actions on one or more file that uses the same pattern.
Linux shell used wildcard characters for globbing.
All the above
Options:
A and B
A and C
A, B, and C
D
Correct answer: 4
D
All given statements are correct about Wildcards in the Linux operating system.
通配符是包含一些特殊字符的字符串模式。
通配符用于对使用相同模式的一个或多个文件执行操作。
Linux shell使用通配符来进行通配。
以上全部
选项:
A和B
A和C
A,B和C
d
正确答案:4
d
所有给定的语句对于Linux操作系统中的通配符都是正确的。
?
*
[]
<>
Options:
A and B
A and C
A, B, and C
D
Correct answer: 3
A, B, and C
In the Linux, Question mark ?, asterisk *, and square brackets [] are used as wildcard characters.
?
*
[]
<>
选项:
A和B
A和C
A,B和C
d
正确答案:3
A,B和C
在Linux中,问号? ,星号*和方括号[]用作通配符。
lastcmd
last
history
chistory
Correct answer: 3
history
The history command is used to display the last executed commands list.
lastcmd
持续
历史
情欲
正确答案:3
历史
历史命令用于显示最后执行的命令列表。
$HISTSIZE
$HISSIZE
$HISTORYSIZE
$HSIZE
Correct answer: 1
$HISTSIZE
The $HISTSIZE environment variable is used to specify the number of commands history in the current environment. It can also modify according to our requirements.
$ HISTSIZE
$ HISSIZE
$ HISTORYSIZE
$ HSIZE
正确答案:1
$ HISTSIZE
$ HISTSIZE环境变量用于指定当前环境中的命令历史记录数。 也可以根据我们的要求进行修改。
##
$$
!!
@@
Correct answer: 3
!!
The double exclamation (!!) is known as "bang bang" in the Linux operating system.
##
$$
!!
@@
正确答案:3
!!
双重感叹号( !! )在Linux操作系统中被称为“ bang bang”。
The "bang bang" command is used to remove commands history.
The "bang bang" command is used to remove execute last executed command.
The "bang bang" command is used to display the last login time of the current user.
None of the above
Correct answer: 2
The "bang bang" command is used to remove execute last executed command.
The "bang bang" command is used to remove execute last executed command.
“ bang bang”命令用于删除命令历史记录。
“ bang bang”命令用于删除执行最后执行的命令。
“ bang bang”命令用于显示当前用户的最后登录时间。
以上都不是
正确答案:2
“ bang bang”命令用于删除执行最后执行的命令。
“ bang bang”命令用于删除执行最后执行的命令。
!N
#N
$N
!!N
Correct answer: 1
!N
The single exclamation is used with history numbers to execute the specific command from history.
!N
#N
$ N
!! N
正确答案:1
!N
单个感叹号与历史记录编号一起使用以执行历史记录中的特定命令。
Yes
No
Correct answer: 1
Yes
Yes, we can embed the new shell on the command line.
是
没有
正确答案:1
是
是的,我们可以在命令行中嵌入新的shell。
翻译自: https://www.includehelp.com/linux/shell-commands-aptitude-questions-and-answers.aspx