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              大公司面試題分享 | Linux運維工程師經典筆試題29道

              如果您對問題有疑問,或者認為答案不準確的,歡迎留言交流。

              問題如下:

              1. cat -n file1file2 命令的意思是?

              A 只會把文件file1的內容輸出到屏幕上。
              B 把文件file1和file2連在一起,然后輸出到屏幕上。
              C 創建文件file1和file2
              D 把file2的內容輸出到file1中并保存
              2. Linux下查看服務程序占用的端口命令是什么?

              A ps -aux
              B netstat –apn
              C watch
              D lsof
              3. 對于Linux說法,下列說法正確的是()

              A 線性訪問內存非法時,當前線程會進入信號處理函數
              B 用mv命令移動文件時,文件的修改時間會發生變化
              C ulimit -c設置的是函數調用棧的大小
              D malloc函數是應用程序向操作系統申請內存的接口
              4. 在Linux系統上,下面那個命令不可以用來查看文件內容()

              A cat
              B ls
              C less
              D more
              5. 下面哪個命令可以從文本文件的每一行中截取指定內容的數據。

              A cp
              B dd
              C fmt
              D cut
              6. Linux下查看磁盤使用情況的命令是?

              A dd
              B df
              C top
              D netstat
              7. 設umask為002, 則新建立的文件的權限是什么?

              A -rw-rw-r–
              B rwxrwx-w-
              C ——-w-
              D rwxrwxr-x
              8. Linux系統中某個可執行文件屬于root并且有setuid,當一個普通用戶mike運行這個程序時,產生的進程的有效用戶和實際用戶分別是____?

              A root mike
              B root root
              C mike root
              D mike mike
              E deamon mike
              F mike deamon
              9. 在linux系統中,用來存放系統所需要的配置文件和子目錄是

              A /etc
              B /var
              C /root
              D /home
              10. 文件exer1 的訪問權限為rw-r–r– ,現要增加所有用戶的執行權限和同組用戶的寫權限,下列命令正確的是

              A chmoda+xg+w exer1
              B chmod 765 exer1
              C chmodo+x exer1
              D chmodg+w exer1
              11. linux查看系統活躍進程的命令是?

              A ps
              B netstat
              C df
              D ifconfig
              12. 用什么命令來顯示當前目錄?

              A echo $(pwd)
              B echo pwd
              C $pwd
              D pwd | echo
              13. crontab文件由6個域組成,每個域之間用空格分隔,下列哪個排列方式是正確的?

              A MIN HOUR DAY MONTH YEAR COMMAND
              B MIN HOUR DAY MONTH DAYOFWEEK COMMAND
              C COMMAND HOUR DAY MONTH DAYOFWEEK
              D COMMAND YEAR MONTH DAY HOUR MIN
              14. 在 Linux 中查看 ARP 緩存記錄的命令是?

              A “arp –a”
              B “arp –d”
              C “arp -L”
              D “arp –D”
              15. 以下函數中,和其他函數不屬于一類的是_____。

              A fread
              B gets
              C getchar
              D pread
              E getline
              F scanf
              16. 在xdm的配置目錄中,哪個文件用來設置在用戶通過xdm登錄后自動起動的應用程序?

              A The Xsession file
              B The Xsetup_0 file
              C The Xstart_up file
              D The GiveConsole file
              17. linux下給文件start.sh設置權限為自己可讀可修改可執行,組內用戶為可讀可執行不可修改,其余用戶沒有任何權限,那么設置該文件權限的命令為()

              A chmod start.sh 706
              B chmod start.sh 750
              C chmod start.sh 705
              D chmod start.sh 777
              18. 采用多路復用I/O監聽3個套接字的數據時,如果套接字描述符分別是:5,17,19,則
              select(int maxfd,struct fd_set* rdset,NULL,NULL)
              中的maxfd應取為()

              A 4
              B 20
              C 5
              D 9
              19. Linux系統中某個可執行文件屬于root并且有setid,當一個普通用戶 mike運行這個程序時,產生的進程的有效用戶和實際用戶分別是?

              A root mike
              B root root
              C mike root
              D mike mike
              E deamon mike
              F mike deamon
              20. 在Linux 系統中,在運行一個程序時,程序中未初始化的全局變量會被加載到以下哪個內存段中?

              A BSS
              B TEXT
              C DATA
              D STACK
              21. int main(){fork()||fork();}共創建幾個進程:_____

              A 1
              B 2
              C 3
              D 4
              E 5
              F 6
              22. 不需要編譯內核的情況是 ()。

              A 刪除系統不用的設備驅動程序時
              B 升級內核時
              C 添加新硬件時
              D 將網卡激活
              23. 下列關于管道(Pipe)通信的敘述中,正確的是()

              A 一個管道可以實現雙向數據傳輸
              B 管道的容量僅受磁盤容量大小限制
              C 進程對管道進行讀操作和寫操作都可能被阻塞
              D 一個管道只能有一個讀進程或一個寫進程對其操作
              24. (多選)下面哪些命令可以查看file1文件的第300-500行的內容?

              A cat file1 | tail -n +300 | head -n 200
              B cat file1| head -n 500 | tail -n +300
              C sed -n ‘300,500p’ file1
              25. (多選)如何查看當前Linux系統的狀態,如CPU使用,內存使用,負載情況,下列描述正確的是?

              A 可以使用top命令分析CPU使用,內存使用,負載等情況
              B 可以使用free查看內存整體的使用情況
              C 可以使用cat /proc/meminfo查看內存更詳細的情況
              D 以上描述都不正確
              26. (多選)下面的內存管理模式中,會產生外零頭的是()

              A 頁式
              B 段式
              C 請求頁式
              D 請求段式
              27. (多選)bash中,需要將腳本demo.sh的標準輸出和標準錯誤輸出重定向至文件demo.log,以下哪些用法是正確的()

              A bash demo.sh &>demo.log
              B bash demo.sh>&demo.log
              C bash demo.sh >demo.log 2>&1
              D bash demo.sh 2>demo.log 1>demo.log
              28. (多選)現在將/目錄下的www文件權限改為只有主用戶有執行的權限的有

              A chmod 100 /www
              B chmod 001 /www
              C chmod u+x ,g-x,o-x /www
              D chmod o-x,g-x,u-x /www
              29. (多選)有命令:
              awk’BEGIN { Arr[2,79]=78 __________ }’
              為了讓執行的結果是78,應該填()語句

              A print Arr[“2\03479”]
              B print Arr[2,79]
              C idx=2 SUBSEP 79;print Arr[idx]
              D print Arr[ 2, 79]
              30. (填空題)在linux中,某文件的權限為:drw-r–r–,該權限用數值形式表示為_______ ,修改文件權限用_______命令。

              答案如下:

              1. B
              2. B
              3. A
              4. B
              5. D
              6. B
              7. A
              8. A
              9. A
              10. A
              11. A
              12. A
              13. B
              14. A
              15. D
              16. B
              17. B
              18. B
              19. A
              20. A
              21. C
              22. D
              23. C
              24. ABC
              25. ABC
              26. BD
              27. ABC
              28. AC
              29. ABCD
              30. 644;chmod

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