System Commands, OPPE 2

September 2023 term, Set 2

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Question 1

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Write a sed script script.sed which will remove all lines which have any one of the words "install", "installed" or "status". Use the following text as reference.

Sample input

2022-05-05 15:55:18 purge grub-pc:amd64 2.02-2ubuntu8.23 <none>
2022-05-05 15:55:18 purge grub-legacy-ec2:all 1:1 <none>
2022-05-05 15:55:18 purge grub-common:amd64 2.02-2ubuntu8.23 <none>
2022-05-05 15:55:14 status installed linux-virtual:amd64 4.15.0.176.165
2022-05-05 15:55:14 status half-installed linux-virtual:amd64 4.15.0.176.165
2022-05-05 15:55:14 status not-installed linux-virtual:amd64 <none>
2022-05-05 15:55:17 status installed grub-legacy-ec2:all 1:1
2022-05-05 15:55:17 status half-installed grub-legacy-ec2:all 1:1
2022-05-05 15:55:17 status installed os-prober:amd64 1.74ubuntu1
2022-05-05 15:55:17 status half-installed os-prober:amd64 1.74ubuntu1
2022-05-05 15:55:17 status installed grub2-common:amd64 2.02-2ubuntu8.23
2022-05-05 16:13:44 status half-installed libogg0:amd64 1.3.2-1
2022-05-05 16:13:44 install x11-common:all <none> 1:7.7+19ubuntu7.1
2022-05-05 16:13:44 status half-installed x11-common:all 1:7.7+19ubuntu7.1
2022-05-05 16:13:44 install libice6:amd64 <none> 2:1.0.9-2
2022-05-05 16:13:44 status half-installed libice6:amd64 2:1.0.9-2
2022-05-05 16:13:44 install libsm6:amd64 <none> 2:1.2.2-1
2022-05-05 16:13:44 status half-installed libsm6:amd64 2:1.2.2-1
2022-05-05 16:13:44 install fonts-dejavu-core:all <none> 2.37-1
2022-05-05 16:13:44 status half-installed fonts-dejavu-core:all 2.37-1
2022-05-05 16:13:44 install fontconfig-config:all <none> 2.12.6-0ubuntu2
2022-05-05 16:13:44 status half-installed fontconfig-config:all 2.12.6-0ubuntu2
2022-05-05 16:13:44 install libfontconfig1:amd64 <none> 2.12.6-0ubuntu2
2022-05-05 16:13:44 status half-installed libfontconfig1:amd64 2.12.6-0ubuntu2
2022-05-05 16:13:44 install libxrender1:amd64 <none> 1:0.9.10-1

Sample output

2022-05-05 15:55:18 purge grub-pc:amd64 2.02-2ubuntu8.23 <none>
2022-05-05 15:55:18 purge grub-legacy-ec2:all 1:1 <none>
2022-05-05 15:55:18 purge grub-common:amd64 2.02-2ubuntu8.23 <none>

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#!/usr/bin/sed -nf
# Write your sed script here

#!/usr/bin/sed -nf # Write your sed script here

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Write a sed script `script.sed` which will remove all lines which have any one of the words "install", "installed" or "status". Use the following text as reference. **Sample input** ```bash 2022-05-05 15:55:18 purge grub-pc:amd64 2.02-2ubuntu8.23 <none> 2022-05-05 15:55:18 purge grub-legacy-ec2:all 1:1 <none> 2022-05-05 15:55:18 purge grub-common:amd64 2.02-2ubuntu8.23 <none> 2022-05-05 15:55:14 status installed linux-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 status half-installed linux-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 status not-installed linux-virtual:amd64 <none> 2022-05-05 15:55:17 status installed grub-legacy-ec2:all 1:1 2022-05-05 15:55:17 status half-installed grub-legacy-ec2:all 1:1 2022-05-05 15:55:17 status installed os-prober:amd64 1.74ubuntu1 2022-05-05 15:55:17 status half-installed os-prober:amd64 1.74ubuntu1 2022-05-05 15:55:17 status installed grub2-common:amd64 2.02-2ubuntu8.23 2022-05-05 16:13:44 status half-installed libogg0:amd64 1.3.2-1 2022-05-05 16:13:44 install x11-common:all <none> 1:7.7+19ubuntu7.1 2022-05-05 16:13:44 status half-installed x11-common:all 1:7.7+19ubuntu7.1 2022-05-05 16:13:44 install libice6:amd64 <none> 2:1.0.9-2 2022-05-05 16:13:44 status half-installed libice6:amd64 2:1.0.9-2 2022-05-05 16:13:44 install libsm6:amd64 <none> 2:1.2.2-1 2022-05-05 16:13:44 status half-installed libsm6:amd64 2:1.2.2-1 2022-05-05 16:13:44 install fonts-dejavu-core:all <none> 2.37-1 2022-05-05 16:13:44 status half-installed fonts-dejavu-core:all 2.37-1 2022-05-05 16:13:44 install fontconfig-config:all <none> 2.12.6-0ubuntu2 2022-05-05 16:13:44 status half-installed fontconfig-config:all 2.12.6-0ubuntu2 2022-05-05 16:13:44 install libfontconfig1:amd64 <none> 2.12.6-0ubuntu2 2022-05-05 16:13:44 status half-installed libfontconfig1:amd64 2.12.6-0ubuntu2 2022-05-05 16:13:44 install libxrender1:amd64 <none> 1:0.9.10-1 ``` **Sample output** ```text 2022-05-05 15:55:18 purge grub-pc:amd64 2.02-2ubuntu8.23 <none> 2022-05-05 15:55:18 purge grub-legacy-ec2:all 1:1 <none> 2022-05-05 15:55:18 purge grub-common:amd64 2.02-2ubuntu8.23 <none> ``` Write a sed script `script.sed` which will remove all html tags. Use the following text as reference to build your sed script. Assume that every tag is closed by a `>`, which may come on a later line than the one where the tag opens. The output is a single line: every line break of the input becomes one space. **Sample Input** ```html A <b>table</b> is an arrangement of <a href="/wiki/Information" title="Information">information</a> or <a href="/wiki/Data" title="Data">data</a>, typically in rows and columns, or possibly in a more complex structure. Tables are widely used in <a href="/wiki/Communication" title="Communication">communication</a>, <a href="/wiki/Research" title="Research">research</a>, and <a href="/wiki/Data_analysis" title="Data analysis">data analysis</a>. Tables appear in print media, handwritten notes, computer software, architectural ornamentation, traffic signs, and many other places. The precise conventions and terminology for describing tables vary depending on the context. Further, tables differ significantly in variety, structure, flexibility, notation, representation and use.<sup id="cite_ref-Fink000_1-0" class="reference" ><a href="#cite_note-Fink000-1">[1]</a></sup ><sup id="cite_ref-Mcnabb000_2-0" class="reference" ><a href="#cite_note-Mcnabb000-2">[2]</a></sup ><sup id="cite_ref-Morgan000_3-0" class="reference" ><a href="#cite_note-Morgan000-3">[3]</a></sup ><sup id="cite_ref-Robey000_4-0" class="reference" ><a href="#cite_note-Robey000-4">[4]</a></sup ><sup id="cite_ref-Zielinski000_5-0" class="reference" ><a href="#cite_note-Zielinski000-5">[5]</a></sup > Information or data conveyed in table form is said to be in <b>tabular</b> format (<a href="https://en.wiktionary.org/wiki/tabular#Adjective" class="extiw" title="wikt:tabular" >adjective</a >). In books and technical articles, tables are typically presented apart from the main text in numbered and captioned <a href="/wiki/Floating_block" class="mw-redirect" title="Floating block" >floating blocks</a >. ``` **Sample Output** ```bash A table is an arrangement of information or data, typically in rows and columns, or possibly in a more complex structure. Tables are widely used in communication, research, and data analysis. Tables appear in print media, handwritten notes, computer software, architectural ornamentation, traffic signs, and many other places. The precise conventions and terminology for describing tables vary depending on the context. Further, tables differ significantly in variety, structure, flexibility, notation, representation and use.[1][2][3][4][5] Information or data conveyed in table form is said to be in tabular format (adjective). In books and technical articles, tables are typically presented apart from the main text in numbered and captioned floating blocks. ``` A `dpkg` log contains the information regarding installed, removed and purged packages. Using the following log for your reference write an AWK script `script.awk` which will list INSTALLED packages, REMOVED packages and PURGED packages with the total installations, removals purges as shown in the standard output. Note: Use Column 3 to decide the installed/removed package **Sample Input** ```bash 2022-05-05 15:55:14 startup packages remove 2022-05-05 15:55:14 remove linux-virtual:amd64 4.15.0.176.165 <none> 2022-05-05 15:55:14 remove linux-headers-virtual:amd64 4.15.0.176.165 <none> 2022-05-05 15:55:14 remove linux-headers-generic:amd64 4.15.0.176.165 <none> 2022-05-05 15:55:15 remove linux-modules-4.15.0-176-generic:amd64 4.15.0-176.185 <none> 2022-05-05 15:55:17 startup packages remove 2022-05-05 15:55:17 remove grub-legacy-ec2:all 1:1 <none> 2022-05-05 15:55:17 remove os-prober:amd64 1.74ubuntu1 <none> 2023-12-09 11:57:17 startup packages remove 2023-12-09 11:57:18 remove npm:all 3.5.2-0ubuntu4 <none> 2023-12-09 11:57:18 remove node-gyp:all 3.6.2-1ubuntu1 <none> 2022-05-05 15:55:15 purge linux-image-4.15.0-176-generic:amd64 4.15.0-176.185 <none> 2022-05-05 15:55:15 purge linux-modules-4.15.0-176-generic:amd64 4.15.0-176.185 <none> 2022-05-05 15:55:18 startup packages purge 2022-05-05 15:55:18 purge grub-pc:amd64 2.02-2ubuntu8.23 <none> 2022-05-05 15:55:18 purge grub-legacy-ec2:all 1:1 <none> 2022-05-05 15:55:18 purge grub-common:amd64 2.02-2ubuntu8.23 <none> 2022-05-05 15:55:14 status installed linux-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 status half-installed linux-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 status not-installed linux-virtual:amd64 <none> 2022-05-05 15:55:17 status installed grub-legacy-ec2:all 1:1 2022-05-05 15:55:17 status half-installed grub-legacy-ec2:all 1:1 2022-05-05 15:55:17 status installed os-prober:amd64 1.74ubuntu1 2022-05-05 15:55:17 status half-installed os-prober:amd64 1.74ubuntu1 2022-05-05 15:55:17 status installed grub2-common:amd64 2.02-2ubuntu8.23 2022-05-05 16:13:44 status half-installed libogg0:amd64 1.3.2-1 2022-05-05 16:13:44 install x11-common:all <none> 1:7.7+19ubuntu7.1 2022-05-05 16:13:44 status half-installed x11-common:all 1:7.7+19ubuntu7.1 2022-05-05 16:13:44 install libice6:amd64 <none> 2:1.0.9-2 2022-05-05 16:13:44 status half-installed libice6:amd64 2:1.0.9-2 2022-05-05 16:13:44 install libsm6:amd64 <none> 2:1.2.2-1 2022-05-05 16:13:44 status half-installed libsm6:amd64 2:1.2.2-1 2022-05-05 16:13:44 install fonts-dejavu-core:all <none> 2.37-1 2022-05-05 16:13:44 status half-installed fonts-dejavu-core:all 2.37-1 2022-05-05 16:13:44 install fontconfig-config:all <none> 2.12.6-0ubuntu2 2022-05-05 16:13:44 status half-installed fontconfig-config:all 2.12.6-0ubuntu2 2022-05-05 16:13:44 install libfontconfig1:amd64 <none> 2.12.6-0ubuntu2 2022-05-05 16:13:44 status half-installed libfontconfig1:amd64 2.12.6-0ubuntu2 2022-05-05 16:13:44 install libxrender1:amd64 <none> 1:0.9.10-1 ``` **Sample output** ```text linux-virtual:amd64 <none> REMOVED linux-headers-virtual:amd64 <none> REMOVED linux-headers-generic:amd64 <none> REMOVED linux-modules-4.15.0-176-generic:amd64 <none> REMOVED grub-legacy-ec2:all <none> REMOVED os-prober:amd64 <none> REMOVED npm:all <none> REMOVED node-gyp:all <none> REMOVED x11-common:all 1:7.7+19ubuntu7.1 INSTALLED libice6:amd64 2:1.0.9-2 INSTALLED libsm6:amd64 2:1.2.2-1 INSTALLED fonts-dejavu-core:all 2.37-1 INSTALLED fontconfig-config:all 2.12.6-0ubuntu2 INSTALLED libfontconfig1:amd64 2.12.6-0ubuntu2 INSTALLED libxrender1:amd64 1:0.9.10-1 INSTALLED total installed=7; total removed=8 ```