Shell Chapter 7 exercise

1、 Show /etc/rc.d/rc.sysinit File with size insensitive h Beginning line ;

[[email protected] zuoye]# grep -i ^[h] file 
[[email protected] zuoye]# sed -n '/^[hH]/p' file

2、 Show /etc/passwd China and Israel sh The line at the end ;

[[email protected] zuoye]# grep  sh$ /etc/passwd

3、 Show /etc/fstab China and Israel # start , One or more whitespace characters followed by , And then it's followed by any non whitespace line ;

[[email protected] zuoye]# grep  ^#" "[^" "].*  /etc/fstab 
[[email protected] zuoye]# sed -n '/^# [^ ].*/p'  /etc/fstab

4、 lookup /etc/rc.d/rc.local Contained in the “ With to Start with to ending ” Word serial of ;

[[email protected] zuoye]# grep   ^to.*to$  /etc/rc.d/rc.local
[[email protected] zuoye]# sed -n '/^to.*to$/p'  /etc/rc.d/rc.local

5、 lookup /etc/inittab contains “ With s start , And d Ending words ” Pattern line ;

[[email protected] zuoye]# grep -E "\<s[^ +*]+*d\>" /etc/inittab 

6、 lookup ifconfig In the command result 1-255 Integer between ;

ifconfig |grep -w "`seq 255`"

7、 Show /var/log/secure The file contains “Failed” or “FAILED” The line of ;

[[email protected] zuoye]# grep -E "(Failed|FAILED)" /var/log/secure

8、 stay /etc/passwd Take out the default shell by bash The line of ;

[[email protected] zuoye]# grep bash$ /etc/passwd

9、 List... In long format /etc/ Directory to ns start 、.conf File information at the end ;

[[email protected] zuoye]# ll /etc/ |grep -E "\<ns[^ +*]+*.conf\>"

10、 Highlight passwd Colon in file , And the characters on both sides

[[email protected] zuoye]# grep -E  ".?:.?" /etc/passwd