Linux Operations Common basic interview exercises (4)-Promotion

Linux Operations Common basic interview exercises (4)-Promotion

1 ( ZZ ) command is executed in the VI Editor to exit the disk

A:q B ZZ c:q! D:wq

2 with a virtual machine installed a Linux system, suddenly want to clone a server, after cloning found unable to surf the internet, how to solve?

1 Remove the UUID MAC address of the Linux NIC Eth0

2 emptying the/etc/udev/rules.d/70-persistent-net.rules

3 reboot

3 Common Network Detection command and Parameter enumeration description

1 Ping

2 Telnet

3 Netstat-lntup

4 traceroute

4 Script implementations: find files larger than 1M under directory/var/log/move to/tmp/log

Find/var/log-type f-size +1m |xargs-i mv {}/tmp/log

Find/var/log-type f-size +1M-EXEC-MV {}/tmp/log

5 What are you going to do if you want to package all the files in the/home/zheng directory into/tmp/zheng.tar.gz? What should I do when I need to recover from a compressed package?

Tar-zcf/tmp/zheng.tar.gz/home/zheng

Tar-xf/tmp/zheng.tar.gz-c/home/zheng

6 A brief description of how to resolve the forgotten root password

1 Enter single user mode, change password

2 Go in rescue mode change password

Modify passwd configuration file directly passwd Modify

7 The command to detect the route that the host has been routed to the destination host under Linux is ( traceroute ).

A Ping B Route C traceroute D ifconfig

8 How to view the top 5 processes that consume the most memory resources, write out the commands

Top

Free-m

9 How to see how much memory a process consumes

[[Email protected] ~]# PS aux | grep ssh

Root 1477 0.0 0.2 66260 1076? Ss Apr08 0:00/usr/sbin/sshd

Root 72692 0.1 0.8 102104 4152? Ss 02:56 0:00 sshd: [Email protected]/0

Root 72741 0.0 0.1 103332 840 pts/0 s+ 03:01 0:00 grep--color=auto ssh

[Email protected] ~]#

10 How do I see the process that occupies port 8080?

[Email protected] ~]# ps-ef |grep 8080

Root 4056 4039 0 18:42 pts/2 00:00:00 grep 8080

[Email protected] ~]#

How to view the TCP port that is being monitored by a PID 100 process

[[email protected] ~]# ps-ef |awk ' {print $} ' |grep 100

11 See which process a port belongs to the command

Ps-ef

Linux Operations Common basic interview exercises (4)-Promotion