1. Find the currently interactive user
650) this.width=650; "src=" Https://s1.51cto.com/wyfs02/M02/00/CF/wKiom1mdh9rxWKWHAABNp7Z1LwU734.png "title=" Screenshot from 2017-08-23 21-48-49.png "alt=" Wkiom1mdh9rxwkwhaabnp7z1lwu734.png "/>
650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M00/9F/7E/wKioL1mdhcSzQBRsAAB5YZ6aqeQ585.png "style=" float : none; "title=" screenshot from 2017-08-21 13-05-09.png "alt=" Wkiol1mdhcszqbrsaab5yz6aqeq585.png "/>
650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M01/00/CF/wKiom1mdhc_i_Fo6AAAaQ65aqZA506.png "style=" float : none; "title=" screenshot from 2017-08-21 13-05-16.png "alt=" Wkiom1mdhc_i_fo6aaaaq65aqza506.png "/>
2. Red Red background display from 1 to 10 chronograph
650) this.width=650; "src=" Https://s2.51cto.com/wyfs02/M00/00/CF/wKiom1mdhc_Q9APsAAA8seoz62U160.png "style=" float : none; "title=" screenshot from 2017-08-21 14-15-51.png "alt=" Wkiom1mdhc_q9apsaaa8seoz62u160.png "/>
3. Query IP Connectivity
650) this.width=650; "src=" Https://s1.51cto.com/wyfs02/M01/9F/7F/wKioL1mdiLXA3Bw2AAB6ovLIsxY733.png "style=" float : none; "title=" screenshot from 2017-08-21 16-04-48.png "alt=" Wkiol1mdilxa3bw2aab6ovlisxy733.png "/>
650) this.width=650; "src=" Https://s1.51cto.com/wyfs02/M02/00/CF/wKiom1mdiMDiaeWGAAA-uOfI7_o621.png "style=" float : none; "title=" screenshot from 2017-08-21 16-05-18.png "alt=" Wkiom1mdimdiaewgaaa-uofi7_o621.png "/>
4. Interactive, prompt query IP connectivity
650) this.width=650; "src=" Https://s2.51cto.com/wyfs02/M01/9F/7F/wKioL1mdiLaCYKEuAAB4qlP8NL8231.png "style=" float : none; "title=" screenshot from 2017-08-21 17-20-34.png "alt=" Wkiol1mdilacykeuaab4qlp8nl8231.png "/>
650) this.width=650; "src=" Https://s2.51cto.com/wyfs02/M02/9F/7F/wKioL1mdiLazXB3NAAAt9sXAkpc242.png "style=" float : none; "title=" screenshot from 2017-08-21 17-20-46.png "alt=" Wkiol1mdilazxb3naaat9sxakpc242.png "/>
650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M00/00/CF/wKiom1mdiMHQS_t0AADd2M0eeR0017.png "style=" float : none; "title=" screenshot from 2017-08-21 17-21-02.png "alt=" Wkiom1mdimhqs_t0aadd2m0eer0017.png "/>
650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M00/00/CF/wKiom1mdiMLQOjo_AADOQu6odWA367.png "style=" float : none; "title=" screenshot from 2017-08-21 17-21-13.png "alt=" Wkiom1mdimlqojo_aadoqu6odwa367.png "/>
5. Display host has several network cards, the IP number of each NIC
650) this.width=650; "src=" Https://s2.51cto.com/wyfs02/M01/9F/7F/wKioL1mdiWzQo7pzAAAgX0BoOfI781.png "style=" float : none; "title=" screenshot from 2017-08-23 09-42-58.png "alt=" Wkiol1mdiwzqo7pzaaagx0boofi781.png "/>
650) this.width=650; "src=" Https://s2.51cto.com/wyfs02/M02/00/CF/wKiom1mdiXfQ06ekAADxoqD1qK8553.png "style=" float : none; "title=" screenshot from 2017-08-23 09-43-55.png "alt=" Wkiom1mdixfq06ekaadxoqd1qk8553.png "/>
6.1 Seconds Countdown with red Red background
650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M00/9F/7F/wKioL1mdiW3DHBYzAACTLjCqI2Q629.png "style=" float : none; "title=" screenshot from 2017-08-23 10-04-05.png "alt=" Wkiol1mdiw3dhbyzaactljcqi2q629.png "/>
7. Automatically set up users in the UserFile
650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M02/9F/7F/wKioL1mdiW7QXRyjAAAhD9959K8522.png "style=" float : none; "title=" screenshot from 2017-08-23 10-13-14.png "alt=" Wkiol1mdiw7qxryjaaahd9959k8522.png "/>
650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M02/00/CF/wKiom1mdiXjTJGXtAAB3MCW_OKc478.png "style=" float : none; "title=" screenshot from 2017-08-23 10-12-23.png "alt=" Wkiom1mdixjtjgxtaab3mcw_okc478.png "/>
650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M01/9F/7F/wKioL1mdiW6RKfVFAADGsNYmYp4810.png "style=" float : none; "title=" screenshot from 2017-08-23 10-12-39.png "alt=" Wkiol1mdiw6rkfvfaadgsnymyp4810.png "/>
8. Automatic deletion of users in UserFile
650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M01/00/CF/wKiom1mdisKQkt20AAAvofz_eLE053.png "style=" float : none; "title=" screenshot from 2017-08-23 10-15-24.png "alt=" Wkiom1mdiskqkt20aaavofz_ele053.png "/>
650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M01/9F/7F/wKioL1mdirigETP_AACNadRwC18216.png "style=" float : none; "title=" screenshot from 2017-08-23 10-15-58.png "alt=" Wkiol1mdirigetp_aacnadrwc18216.png "/>
650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M00/9F/7F/wKioL1mdirmxRRh3AAC_-NpJEKs176.png "style=" float : none; "title=" screenshot from 2017-08-23 10-16-16.png "alt=" Wkiol1mdirmxrrh3aac_-npjeks176.png "/>
9.10 Seconds Countdown
650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M02/00/CF/wKiom1mdisTCpYmvAACaRfyTVW8990.png "style=" float : none; "title=" screenshot from 2017-08-23 11-28-09.png "alt=" Wkiom1mdistcpymvaacarfytvw8990.png "/>
650) this.width=650; "src=" Https://s1.51cto.com/wyfs02/M01/9F/7F/wKioL1mdirrQhyunAAAdNSxc6i0562.png "style=" float : none; "title=" screenshot from 2017-08-23 11-28-40.png "alt=" Wkiol1mdirrqhyunaaadnsxc6i0562.png "/>
10.1 minutes and 10 seconds Countdown
650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M00/00/CF/wKiom1mdisWxYpuMAACwLtwcXRE245.png "style=" float : none; "title=" screenshot from 2017-08-23 13-36-43.png "alt=" Wkiom1mdiswxypumaacwltwcxre245.png "/>
650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M02/9F/7F/wKioL1mdi4vCdTveAADZJWJYr_g241.png "style=" float : none; "title=" screenshot from 2017-08-23 13-36-55.png "alt=" Wkiol1mdi4vcdtveaadzjwjyr_g241.png "/>
650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M01/00/CF/wKiom1mdi5ayeALdAAAdHq4k_y8370.png "style=" float : none; "title=" screenshot from 2017-08-23 13-37-10.png "alt=" Wkiom1mdi5ayealdaaadhq4k_y8370.png "/>
11. Character Inversion
650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M01/9F/7F/wKioL1mdi4yx1cjJAAAtz0_CeXM431.png "style=" float : none; "title=" screenshot from 2017-08-23 13-41-51.png "alt=" Wkiol1mdi4yx1cjjaaatz0_cexm431.png "/>
650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M01/00/CF/wKiom1mdi5exuNECAACZrcOQ6Zc737.png "style=" float : none; "title=" screenshot from 2017-08-23 13-42-18.png "alt=" Wkiom1mdi5exunecaaczrcoq6zc737.png "/>
12. Interactive Query file type
650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M00/9F/7F/wKioL1mdjAjQY2P3AAB6OBnerEw280.png "style=" float : none; "title=" screenshot from 2017-08-23 13-56-15.png "alt=" Wkiol1mdjajqy2p3aab6obnerew280.png "/>
650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M00/00/CF/wKiom1mdjBSxAk0xAACMoe0ZZ9g952.png "style=" float : none; "title=" screenshot from 2017-08-23 15-09-22.png "alt=" Wkiom1mdjbsxak0xaacmoe0zz9g952.png "/>
13. Automatically create a new UserFile user, the password is the value in Passfile
650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M02/9F/7F/wKioL1mdiW7QXRyjAAAhD9959K8522.png "style=" float : none; "title=" screenshot from 2017-08-23 10-13-14.png "alt=" Wkiol1mdiw7qxryjaaahd9959k8522.png "/>
Password:
650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M01/00/D0/wKiom1mdknaiso9WAAAQT07MI64757.png "style=" float : none; "title=" screenshot from 2017-08-23 22-31-24.png "alt=" Wkiom1mdknaiso9waaaqt07mi64757.png "/>
650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M02/00/CF/wKiom1mdjBOxqogAAAAWuqxi58g038.png "style=" float : none; "title=" screenshot from 2017-08-23 15-05-47.png "alt=" Wkiom1mdjboxqogaaaawuqxi58g038.png "/>
650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M01/9F/7F/wKioL1mdjAricp7tAAEnMNVb31w883.png "style=" float : none; "title=" screenshot from 2017-08-23 15-06-34.png "alt=" Wkiol1mdjaricp7taaenmnvb31w883.png "/>
14. Automatically create a new UserFile user, the password is the value in Passfile
automatic deletion of users in UserFile
User:
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Password:
650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M01/00/D0/wKiom1mdknaiso9WAAAQT07MI64757.png "style=" float : none; "title=" screenshot from 2017-08-23 22-31-24.png "alt=" Wkiom1mdknaiso9waaaqt07mi64757.png "/>
650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M01/9F/7F/wKioL1mdkmyhtSFaAAFD0kmHgqQ712.png "style=" float : none; "title=" screenshot from 2017-08-23 22-32-09.png "alt=" Wkiol1mdkmyhtsfaaafd0kmhgqq712.png "/>
650) this.width=650; "src=" Https://s1.51cto.com/wyfs02/M02/00/D0/wKiom1mdknfAZpV1AAEfa4SNHFw245.png "style=" float : none; "title=" screenshot from 2017-08-23 22-32-37.png "alt=" Wkiom1mdknfazpv1aaefa4snhfw245.png "/>
650) this.width=650; "src=" Https://s1.51cto.com/wyfs02/M02/9F/7F/wKioL1mdkm2jZ6UoAABbjL5wdhM575.png "style=" float : none; "title=" screenshot from 2017-08-23 22-32-50.png "alt=" Wkiol1mdkm2jz6uoaabbjl5wdhm575.png "/>
650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M00/00/D0/wKiom1mdk6ihkQAmAAAUhdjoX-o745.png "style=" float : none; "title=" screenshot from 2017-08-23 22-38-48.png "alt=" Wkiom1mdk6ihkqamaaauhdjox-o745.png "/>
650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M02/9F/80/wKioL1mdk56TXfZHAAATseIwAOw478.png "style=" float : none; "title=" screenshot from 2017-08-23 22-39-10.png "alt=" Wkiol1mdk56txfzhaaatseiwaow478.png "/>
15. Querying host names with IP 1 to 30 within the LAN
Make an auto answer file
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650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M02/9F/7F/wKioL1mdjAuSm2WeAADxRpgHcwc487.png "style=" float : none; "title=" screenshot from 2017-08-23 17-37-49.png "alt=" Wkiol1mdjausm2weaadxrpghcwc487.png "/>
650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M02/9F/7F/wKioL1mdjAvwjIckAAAwXcCF7Ig066.png "style=" float : none; "title=" screenshot from 2017-08-23 17-39-04.png "alt=" Wkiol1mdjavwjickaaawxccf7ig066.png "/>
Shell scripting exercises for the Linux shell scripts