Users 'user1' and 'user2' both belong to the users' group. The file 'file1' belongs to 'user1'. If 'user2' wants to modify this file, which permission of file1 can guarantee the successful modification.
A. 744
B. 664
C. 646
D. 746
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The following is the output of ls -al, which one is the symbolic link file:
A. -rw------- 2 hel users 56 Sep 09 11:05 goodbye
B. drwx----- 1 hel users 1024 Sep 10 08:10 zhang
C. lrwx----- 1 hel users 2024 Sep 12 08:12 cheng->goodbye
D. -rw------- 1 hel users 56 Sep 09 11:05 hello
The following is the output of ls -al, which one is a directory file:
A. -rw------- 1 hel users 56 Sep 09 11:05 hello
B. -rw------- 2 hel users 56 Sep 09 11:05 goodbye
C. drwx----- 1 hel users 1024 Sep 10 08:10 zhang
D. lrwx----- 1 hel users 2024 Sep 12 08:12 cheng->goodbye
The following is the output of ls -al, which one is a hard link file:
A. -rw------- 1 hel users 56 Sep 09 11:05 hello
B. -rw------- 2 hel users 56 Sep 09 11:05 goodbye
C. drwx----- 1 hel users 1024 Sep 10 08:10 zhang
D. lrwx----- 1 hel users 2024 Sep 12 08:12 cheng->goodbye
The following is the output of command ‘ps –t tty1', which one is the zombie process.UID PID PPID C STIME TTY TIME CMDA root 2258 2199 0 10:09 tty1 00:00:00 -bashB root 2339 2258 0 10:13 tty1 00:00:00 ./zombC root 2340 2339 0 10:13 tty1 00:00:00 [zomb]
A root 2258 2199 0 10:09 tty1 00:00:00 -bash
B root 2339 2258 0 10:13 tty1 00:00:00 ./zomb
C root 2340 2339 0 10:13 tty1 00:00:00 [zomb]
D. B and C
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