Linux Search Pattern Question: Download Search Pattern PDF

Indicate the right option to search for anything not a letter or number:
a) grep '^[a-zA-Z0-9]'
b) grep '[^a-zA-Z0-9]'
c) grep '[a-zA-Z0-9]'
d) None of the above in Search Pattern

b) grep '[^a-zA-Z0-9]'

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One of the entry of /etc/passwd file is shown below: user1:x:1111:2222:google:/home/user1:/bin/bash Which among the following will print userid and home dir in the following pattern "user1:/home/user1"? a) awk `{print $1 ":" $6}` /etc/passwd b) awk `{print $1 ":" $7}` /etc/passwd c) awk `{print $2 ":" $6}` /etc/passwd d) awk `{print $2 ":" $7}` /etc/passwd	What command is used to list contents of directories? A. tar B. dir C. lp D. ls E. None of the above