powershell learning exercises

$J"ExitWrite a script:1, add ten users user1 to user10, password with the user name, but requires only the user does not exist in the case can be added; Extended:Accept a parameter:Add: Adding user user1. User10Del: Delete user user1. User10Other: ExitAdminusers User1,user2,user3,hello,hi!/bin/bashif [= = = "Add"];thenFor I in {1..10};d oIf ID user$i >/dev/null;thenecho "user$i is exist"ElseUseradd user$iecho "User$1" | passwd--stdin user$i >/dev/nullFiDoneelif [= = = "Del"];thenFor I in {1..10

]$ exitexit[[email protected] ~]# groupmems-l-G VLAN Vlan1 　　　Second, the new files created in the/testdir/data automatically belong to the G1 Group, group G2 members such as: Alice can have read and write permissions to these new files, group G3 members such as: Alice can have read and write access to these new files, group G3 members such as: Tom can only have read access to the new file, Other users (not part of G1,G2,G3) cannot access this folder.[[email protected] testdir]# mkdir-p/da

1. Copy the/etc/grub.conf configuration file to the/tmp directory and use the Find replacement command to delete the white space character at the beginning of the/etc/grub.conf file 12 [[email protected] tmp] # cp-sv/etc/grub.conf."/etc/grub.conf" - "./grub.conf" 1 :%s/^[[:space:]]//g 2. Copy the/etc/rc.d/init.d/functions file to the/tmp directory and add a # to the beginning of the line beginning with a white-space ch

Practice1, every Monday to Saturday 3:20 A.M., run the CP command to save the/etc/directory, storage locationFor/BACKUPS/ETC-YYYY-MM-DD;3 * * 1-6/bin/cp-a/etc/tmp/etc-' Date +\%f '2, every Sunday 2:30 A.M., run the CP command to backup the/etc/fstab file, the storage location is/backup/fstab-Yyyy-mm-dd-hh-mm-ss2 * * 7/bin/cp-a/etc/fstab/backup/fstab-' date +\%f-\%h-\%m-\%s '3, every night 12 o'clock, get all the lines in the/proc/meminfo file starting with S or M, appendTo the/statistics/meminfo

"" "Title: the bonus paid by the enterprise is based on the profit commission. Profit (I) less than or equal to $100,000, the bonus can be raised by 10%, the profit is higher than $100,000, less than $200,000, the portion of less than 100,000 yuan by 10% commission, higher than the portion of 100,000 yuan, a commission of 7.5%, 200,000 to 400,000, higher than 200,000 yuan, can commission 5% ; Between 400,000 and 600,000 is higher than the portion of 400,000 yuan, can commission 3%, 600,000 to 1

# Coding=utf-8import turtle# Draw Pentagram def Drawstar (x): Turtle.begin_fill () for I in range (5): Turtle.forward (x ) Turtle.right (144) Turtle.end_fill () # transfer position def goTo (x, y): turtle.up () Turtle.goto (x, y) Turtle.down () Turtle.setup (864, 576) Turtle.bgcolor ("Red") Turtle.color ("Yellow") Turtle.fillcolor ("Yellow") Turtle.hideturtle () GoTo ( -380, X) Turtle.showturtle () Drawstar () for I in range (4): x = 1 If i in [0, 3]:

Java.util.hashmap;import java.util.iterator;import Java.util.map;import Java.util.scanner;import Java.util.treemap;import Javax.management.runtimeerrorexception;public class Main {public static void Main (string[] args) {/* The application of Map collection in table-checking method is more */int num; Scanner in = new Scanner (system.in); num = In.nextint (); String week = Get_week (num-1); SYSTEM.OUT.PRINTLN (week); System.out.println (Get_week_english (Week)); In.close ();} public static Strin

number and name of the student whose course number is 003 and the course score is more than 80 33. Number of students in selected courses 34. The name of the students with the highest grade and their achievements in the course of the "Lao Tzu" Teacher 35. Check each course and the corresponding number of elective 36. The student's number, course number, and student score of the students who have the same results in different courses 37. Retrieve the student number of at least two

Guide In the Linux environment, we are easily able to manipulate everything by command, and in Windows, PowerShell is a rising star, providing a large number of cmdlets and C # horizontal expansion. The following will be a small series to lead you through the PowerShell folder sharing, of course, the article will not snub the CMD this veteran. folder sharing OverviewThe application of the sh

Typical Cases of Database SQL learning: exercises for scores of professional students; for one question ------ which students have chosen course 1 but not course 2? The following SQL statements are written in different ways ~ No mysqldescSC; + ------- + --------------- + ------ + ----- + --------- + ------- + | Field | Type | Null Typical Cases of Database SQL learning