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2025-03-31 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >
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In this issue, the editor will bring you an analysis of DAY2 shell exercises. The article is rich in content and analyzed and described from a professional point of view. I hope you can get something after reading this article.
Exercise 1
Write a shell script to copy all the directories under the / app/oracle/utils directory (only one level is needed) to the new directory.
#! / usr/bin/bash
Cd / app/oracle/utils
For f in `ls`; do
If [- d $f], then
Cp-r $f / tmp
Fi
Done
Summary of error points:
1 spaces before and after brackets
There is no parameter r after 2 cp. If there are files under the directory, it will indicate that it cannot be pasted.
# # omiting directory
Exercise 2
Write shell script, batch build user user_00, user_01,... User_100 and all users belong to the users group
$cat user_day2.sh
#! / bin/bash
Groupadd users
For i in `seq-f "user_g" 0100`; do
Useradd-g users $I
Done
If you don't know how to use seq-f, you can use the following:
#! / bin/bash
Groupadd users
For i in `seq 0 9`; do
Useradd-g users user_0 $I
Done
For j in `seq 10 100`; do
Useradd-g users user_$j
Done
The above is the analysis of the DAY2 shell exercises shared by the editor. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.
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