One of the Linux Shell Scripting Learning and combat

1. Create 10 files in the/test directory using a For loop such as: Test-1,test-2,... test-10
mkdirsh.sh
#!/bin/bash
For i in ' seq 10 '
Do
[!-d/test] && mkdir-p/test
touch/test/test-$i
Done
chmod +x mkdirsh.sh

2, in the/test directory to quickly create 10 file methods such as: Test-1,test-2,... test-10
[[email protected] test]# Touch test-{1..10}
[email protected] test]# LL
Total 0
-rw-r--r--1 root root 0 Mar 10:36 test-1
-rw-r--r--1 root root 0 Mar 10:36 test-10
-rw-r--r--1 root root 0 Mar 10:36 test-2
-rw-r--r--1 root root 0 Mar 10:36 test-3
-rw-r--r--1 root root 0 Mar 10:36 test-4
-rw-r--r--1 root root 0 Mar 10:36 test-5
-rw-r--r--1 root root 0 Mar 10:36 test-6
-rw-r--r--1 root root 0 Mar 10:36 test-7
-rw-r--r--1 root root 0 Mar 10:36 test-8
-rw-r--r--1 root root 0 Mar 10:36 test-9

3, change the above file name test to Bruce (with for Loop)
renamesh.sh
#!/bin/bash
[-d/test] && cd/test
For file in ' LS test* '
Do
MV $file ' echo $file | Sed ' s#test#bruce#g '
Done
chmod +x renamesh.sh

4, the above file name of Bruce quickly changed to network

[Email protected] test]# Rename test network *bruce*
[email protected] test]# LL
Total 0
-rw-r--r--1 root root 0 Mar 10:36 network-1
-rw-r--r--1 root root 0 Mar 10:36 network-10
-rw-r--r--1 root root 0 Mar 10:36 network-2
-rw-r--r--1 root root 0 Mar 10:36 network-3
-rw-r--r--1 root root 0 Mar 10:36 network-4
-rw-r--r--1 root root 0 Mar 10:36 network-5
-rw-r--r--1 root root 0 Mar 10:36 network-6
-rw-r--r--1 root root 0 Mar 10:36 network-7
-rw-r--r--1 root root 0 Mar 10:36 network-8
-rw-r--r--1 root root 0 Mar 10:36 network-9

5, Batch create 10 system account test01,test02,... test10 and set a password
(1), first understand the method of generating ordinal numbers
[Email protected] test]#echo {01..10}
Geneva, the
[Email protected] test]#seq 10
1
2
3
4
5
6
7
8
9
Ten
[Email protected] test]#Seq-w 10
01
02
03
04
05
06
07
08
09
Ten

(2), based on the ordinal number to generate user account and password information in turn
createusersh.sh
#!/bin/bash
For i in ' seq-w 10 '
Do
Useradd test$i && echo "Test$i" | passwd--stdin test$i
Done
chmod +x createusersh.sh
[Email protected] ~]#./createusersh.sh
Changing password for user test01.
Passwd:all authentication tokens updated successfully.
Changing password for user test02.
Passwd:all authentication tokens updated successfully.
Changing password for user test03.
Passwd:all authentication tokens updated successfully.
Changing password for user test04.
Passwd:all authentication tokens updated successfully.
Changing password for user test05.
Passwd:all authentication tokens updated successfully.
Changing password for user test06.
Passwd:all authentication tokens updated successfully.
Changing password for user test07.
Passwd:all authentication tokens updated successfully.
Changing password for user test08.
Passwd:all authentication tokens updated successfully.
Changing password for user test09.
Passwd:all authentication tokens updated successfully.
Changing password for user test10.
Passwd:all authentication tokens updated successfully.
[Email protected] ~]# CAT/ETC/PASSWD | grep test*
Test01:x:502:502::/home/test01:/bin/bash
Test02:x:503:503::/home/test02:/bin/bash
Test03:x:504:504::/home/test03:/bin/bash
Test04:x:505:505::/home/test04:/bin/bash
Test05:x:506:506::/home/test05:/bin/bash
Test06:x:507:507::/home/test06:/bin/bash
Test07:x:508:508::/home/test07:/bin/bash
Test08:x:509:509::/home/test08:/bin/bash
Test09:x:510:510::/home/test09:/bin/bash
Test10:x:511:511::/home/test10:/bin/bash
Description: Build test01,test02,... test10 user success!

6. Delete users in bulk
userdelsh.sh
#!/bin/bash
For username in ' cat/etc/passwd| grep test*|awk-f: ' {print '} '
Do
Userdel-r $username
Done
chmod +x userdelsh.sh
[Email protected] ~]#./userdelsh.sh
[Email protected] ~]# Cat/etc/passwd|grep test*
Description: Delete test01,test02,... test10 user success!

7, Batch create 10 accounts bruce01,bruce02,... Bruce10 and set a random password
createusernew.sh
#!/bin/bash
For i in ' seq-w 10 '
Do
Passwd= ' echo $RANDOM | md5sum | Cut-c 1-8 '
# #注意: After a random number is defined as a variable, its value remains the same during subsequent references!
Useradd bruce$i && echo "$PASSWD" | passwd--stdin bruce$i
Echo-e "user:bruce$i \ Password: $passwd" >>/tmp/userandpw.log
Done
chmod +x createusernew.sh

[Email protected] ~]#./createusernew.sh
Changing password for user bruce01.
Passwd:all authentication tokens updated successfully.
Changing password for user bruce02.
Passwd:all authentication tokens updated successfully.
Changing password for user bruce03.
Passwd:all authentication tokens updated successfully.
Changing password for user bruce04.
Passwd:all authentication tokens updated successfully.
Changing password for user bruce05.
Passwd:all authentication tokens updated successfully.
Changing password for user bruce06.
Passwd:all authentication tokens updated successfully.
Changing password for user bruce07.
Passwd:all authentication tokens updated successfully.
Changing password for user bruce08.
Passwd:all authentication tokens updated successfully.
Changing password for user bruce09.
Passwd:all authentication tokens updated successfully.
Changing password for user bruce10.
Passwd:all authentication tokens updated successfully.
[Email protected] ~]# SU-BRUCE01
[Email protected] ~]$ Cat/tmp/userandpw.log
USER:BRUCE01 password:277e5794
USER:BRUCE02 Password:e0ed3fdb
USER:BRUCE03 password:1936a6d4
User:bruce04 password:dd10be6e
User:bruce05 password:842e552b
User:bruce06 password:ed8d2b54
User:bruce07 PASSWORD:50DA7BCF
User:bruce08 password:0463a374
User:bruce09 PASSWORD:F29E9D10
User:bruce10 password:6e88cb6a
[Email protected] ~]$ SU-BRUCE02
Password:
[[Email protected] ~]$ exit
Description: Batch create user and generate random number password verification and login successfully!

This article is from the "Bruce_tan" blog, make sure to keep this source http://380281.blog.51cto.com/370281/1758365

One of the Linux Shell Scripting Learning and combat