Shulou(Shulou.com)06/03 Report--

1.pwd View current path

2.cd,cd..

3.ls,ll

4.cp a.txt b.txt replication

5.mv test test_20190323 renamed mv test_20190323 / fcy/a move, cut

6. Rm-rf log.txt.*

7.mkdir test

8.rmdir test1

9.tail-f catalina.out, tail-f log.txt read the log

10.cat/less/more catalina.out View Files

11.vi entityengine.xml view the file. If you don't have it, create a new one.

I enter the editor

Esc exits editing

/ name looks for name. If there are multiple values, press n to the next one.

: Q exit (no modification)

: q! Exit (have changes, but do not want to save)

: X save exit

Wq save exit

12.ps-ef | grep java,ps-ef | grep catalina, ps-ef | grep mysql

13.tar-zxvpf file.tar.gz unzips a gzip-compressed tar package and retains the original attributes

14.yum install xxx

15.hostname

16.whoami

17.clear

18.date

19.find / fcy/a-name b.txt find /-name java find-name mysql

20.ifconfig

21.kill-9 pid

22.rpm-ivh xxx.rpm

23.rz upload sz log.txt download

24.sh startup.sh

25.chmod 777 a.txt chmod a=rwx a.txt chmod a+rwx a.txt chmod-R 777 Linix/*

U indicates the owner of the file, g indicates the same group (group) as the owner of the file, o indicates other people, and an indicates all three.

+ means to increase permissions,-to cancel permissions, and = to set permissions uniquely.

R for readable, w for writable, x for executable

26.sed-I's a.txt JerryUniple G'Universe stands for replacement, replacing the jerry in the file with tom

Sed-I'2a this is third line' b.txt a stands for adding, followed by this is third line after the second line

27. & put it at the end of the command, which can be executed in the background, nohup sh start.sh > log.txt & tail-f a.txt &

Ctrl+z puts a command that is being executed in the foreground in the background and is paused and cannot be executed

28. > generate the content directly to the specified file, overwrite the content in the source file, and then view it with cat, more, and less

Append to the tail will not overwrite the original content in the file

29.jobs to view commands currently running in the background

Jobs-l displays the PID of all tasks

30.bg 1 (the job number of the process), the program paused in the background starts to run

Fg 1 (the job number of the process), which transfers the background process to the foreground to run

31.yum install unzip unzip wxengine.zip decompresses zip-r wxengine.zip wxengine package

32.df, df-h check disk space usage fdisk-l | grep Disk

33.du, du-sh * displays the disk usage space for each file and directory

34. TopJournal PS aux looks at the memory and cpu consumed by a process

34.free to check system memory usage or actual available memory with cat / proc/meminfo = free+buffer+cache

thirty-five。 Restart Tomcat:

Ps-ef | grep java or direct ps-ef | grep catalina

Kill-9 pid

Go to the bin directory and check the log while sh startup.sh & tail-f.. / logs/catalina.out starts

36.vi / etc/my.cnf mysql configuration file, which can set the maximum number of connections

Service mysqld status

Service mysqld stop

Service mysqld start

Service mysqld restart

37.vi / etc/httpd/conf/httpd.conf apache configuration file

The executable file is in / usr/sbin

Service httpd status

Service httpd stop

Service httpd start

Service httpd restart

thirty-seven。 Start mq. / activemq start

38.su switching users only switch root identities, but the Shell environment is still for ordinary users, and pwd, working directory is still for ordinary users.

Su-switch user user and Shell environment switch to root identity, pwd, working directory to root

PATH environment variable errors will not occur only if the Shell environment is switched.

thirty-nine。 The log is much more garbled, top can solve it, SecureCRTSecureFX_7.0.0.326 Chinese version, bug of the tool itself

forty。 After installing VMware Tools,tar and unzipping it, go to the directory of vmware-install.pl and execute sudo. / vmware-install.pl

41.crontab is similar to the scheduled tasks under windows. When the operating system is installed, this service tool is installed by default.

And the crond process is started automatically, and the crond process checks periodically every minute to see if there is a task to be executed, and if so, automatically executes the task

The crond service should be installed by default. If not, install: yum install crontabs first.

Service crond status View status

Service crond start Startup Service

Service crond stop shuts down the service

Service crond restart restart service

Crontab-u root-l View list

Crontab-u root-r deletion

Crontab-u root-e editing (vi operation)

For example:

* / bin/echo 'date' > / dev/console outputs date to the console every minute

* date > / dev/console output time per minute to the console

First column: minutes 0-59

Second column: 0-23 hours

The third column: day 1-31

Column 4: month 1-12

Fifth column: any integer between 0 and 7, with 0 or 7 representing Sunday

Column 6: commands to run

Command is executed every 1 minute

* command

Execute * / 5 * every five minutes

Executed in the 3rd and 15th minutes of each hour

3Jing 15 * command

Performed at the 3rd and 15th minutes from 8 a.m. to 11:00

3Jing 15 8-11 * command

Every two days from 8am to 11:00 in the 3rd and 15th minutes.

3 command 15 8-11 * / 2 * *

Every Monday at the 3rd and 15th minutes from 8am to 11:00

3 command 15 8-11 * * 1

Restart smb at 21:30 every night

30 21 * / etc/init.d/smb restart

Restart smb at 4: 45 on the 1st, 10th and 22nd of each month

45-4-1-10-10-22 * / etc/init.d/smb restart

Restart smb at 1:10 every Saturday and Sunday

10 1 * * 6 0 / etc/init.d/smb restart

Restart smb every 30 minutes between 18: 00 and 23: 00 every day

0pr 30 18-23 * / etc/init.d/smb restart

Pm restarts smb at 11:00 every Saturday night

0 23 * * 6 / etc/init.d/smb restart

Restart smb every hour

* * / 1 * / etc/init.d/smb restart

Restart smb every other hour between 11:00 and 7 a.m.

* 23-7bat 1 * / etc/init.d/smb restart

Restart smb on the 4th of each month and 11:00 from Monday to Wednesday

0 11 4 * mon-wed / etc/init.d/smb restart

Restart smb at 4: 00 on January 1st

0 4 1 jan * / etc/init.d/smb restart

Execute scripts in the / etc/cron.hourly directory every hour

01 * root run-parts / etc/cron.hourly

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