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Exact system actions when we use this commands

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}

-1

I use Ubuntu Studio 18.04.2 LTS (64 bit Linux).

I want to know what exactly the system does when we use the following commands:

sudo dpkg -l | grep -i ^rc

sudo dpkg -l | grep -i ^rc | cut -d " " -f 3 | xargs dpkg --purge

command-line

share|improve this question

edited 6 hours ago

dessert

25.7k674108

asked 6 hours ago

JuanJuan

5604827

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  dpkg queries list of installed packages, other commands just filter the output
  
  – Sergiy Kolodyazhnyy
  6 hours ago
  

  
  
  
  

add a comment | 

-1

I use Ubuntu Studio 18.04.2 LTS (64 bit Linux).

I want to know what exactly the system does when we use the following commands:

sudo dpkg -l | grep -i ^rc

sudo dpkg -l | grep -i ^rc | cut -d " " -f 3 | xargs dpkg --purge

command-line

share|improve this question

edited 6 hours ago

dessert

25.7k674108

asked 6 hours ago

JuanJuan

5604827

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  dpkg queries list of installed packages, other commands just filter the output
  
  – Sergiy Kolodyazhnyy
  6 hours ago
  

  
  
  
  

add a comment | 

I use Ubuntu Studio 18.04.2 LTS (64 bit Linux).

I want to know what exactly the system does when we use the following commands:

sudo dpkg -l | grep -i ^rc

sudo dpkg -l | grep -i ^rc | cut -d " " -f 3 | xargs dpkg --purge

command-line

share|improve this question

edited 6 hours ago

dessert

25.7k674108

asked 6 hours ago

JuanJuan

5604827

sudo dpkg -l | grep -i ^rc

sudo dpkg -l | grep -i ^rc | cut -d " " -f 3 | xargs dpkg --purge

share|improve this question

edited 6 hours ago

dessert

25.7k674108

asked 6 hours ago

JuanJuan

5604827

share|improve this question

edited 6 hours ago

dessert

25.7k674108

asked 6 hours ago

JuanJuan

5604827

edited 6 hours ago

dessert

25.7k674108

edited 6 hours ago

dessert

25.7k674108

asked 6 hours ago

JuanJuan

5604827

asked 6 hours ago

JuanJuan

5604827

1 Answer
1

active

oldest

votes

4

sudo dpkg -l 

list packages

| grep -i ^rc

that start (^) with rc

| cut -d " " -f 3 

"cut" at the space, select only the 3rd field (-f 3).

| xargs dpkg --purge

and purge it. Example without purging:

$ sudo dpkg -l | grep -i ^rc 

rc  linux-image-5.0.0-7-generic           5.0.0-7.8                           amd64        Signed kernel image generic

rc  linux-modules-5.0.0-7-generic         5.0.0-7.8                           amd64        Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP

rc  linux-modules-extra-5.0.0-7-generic   5.0.0-7.8                           amd64        Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP





$ sudo dpkg -l | grep -i ^rc | cut -d " " -f 3 

linux-image-5.0.0-7-generic

linux-modules-5.0.0-7-generic

linux-modules-extra-5.0.0-7-generic

share|improve this answer

answered 5 hours ago

RinzwindRinzwind

211k28406541

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is sudo needed? Does grep’s -i change anything? But that’s the second column… What does removing every rc package do to the system, is it harmful/a good idea/unnecessary/…?
  
  – dessert
  4 hours ago
  

  
  
  
  

add a comment | 

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4

sudo dpkg -l 

list packages

| grep -i ^rc

that start (^) with rc

| cut -d " " -f 3 

"cut" at the space, select only the 3rd field (-f 3).

| xargs dpkg --purge

and purge it. Example without purging:

$ sudo dpkg -l | grep -i ^rc 

rc  linux-image-5.0.0-7-generic           5.0.0-7.8                           amd64        Signed kernel image generic

rc  linux-modules-5.0.0-7-generic         5.0.0-7.8                           amd64        Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP

rc  linux-modules-extra-5.0.0-7-generic   5.0.0-7.8                           amd64        Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP





$ sudo dpkg -l | grep -i ^rc | cut -d " " -f 3 

linux-image-5.0.0-7-generic

linux-modules-5.0.0-7-generic

linux-modules-extra-5.0.0-7-generic

share|improve this answer

answered 5 hours ago

RinzwindRinzwind

211k28406541

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is sudo needed? Does grep’s -i change anything? But that’s the second column… What does removing every rc package do to the system, is it harmful/a good idea/unnecessary/…?
  
  – dessert
  4 hours ago
  

  
  
  
  

add a comment | 

4

sudo dpkg -l 

list packages

| grep -i ^rc

that start (^) with rc

| cut -d " " -f 3 

"cut" at the space, select only the 3rd field (-f 3).

| xargs dpkg --purge

and purge it. Example without purging:

$ sudo dpkg -l | grep -i ^rc 

rc  linux-image-5.0.0-7-generic           5.0.0-7.8                           amd64        Signed kernel image generic

rc  linux-modules-5.0.0-7-generic         5.0.0-7.8                           amd64        Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP

rc  linux-modules-extra-5.0.0-7-generic   5.0.0-7.8                           amd64        Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP





$ sudo dpkg -l | grep -i ^rc | cut -d " " -f 3 

linux-image-5.0.0-7-generic

linux-modules-5.0.0-7-generic

linux-modules-extra-5.0.0-7-generic

share|improve this answer

answered 5 hours ago

RinzwindRinzwind

211k28406541

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is sudo needed? Does grep’s -i change anything? But that’s the second column… What does removing every rc package do to the system, is it harmful/a good idea/unnecessary/…?
  
  – dessert
  4 hours ago
  

  
  
  
  

add a comment | 

sudo dpkg -l 

list packages

| grep -i ^rc

that start (^) with rc

| cut -d " " -f 3 

"cut" at the space, select only the 3rd field (-f 3).

| xargs dpkg --purge

and purge it. Example without purging:

$ sudo dpkg -l | grep -i ^rc 

rc  linux-image-5.0.0-7-generic           5.0.0-7.8                           amd64        Signed kernel image generic

rc  linux-modules-5.0.0-7-generic         5.0.0-7.8                           amd64        Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP

rc  linux-modules-extra-5.0.0-7-generic   5.0.0-7.8                           amd64        Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP





$ sudo dpkg -l | grep -i ^rc | cut -d " " -f 3 

linux-image-5.0.0-7-generic

linux-modules-5.0.0-7-generic

linux-modules-extra-5.0.0-7-generic

share|improve this answer

answered 5 hours ago

RinzwindRinzwind

211k28406541

sudo dpkg -l 

| grep -i ^rc

| cut -d " " -f 3 

| xargs dpkg --purge

$ sudo dpkg -l | grep -i ^rc 

rc  linux-image-5.0.0-7-generic           5.0.0-7.8                           amd64        Signed kernel image generic

rc  linux-modules-5.0.0-7-generic         5.0.0-7.8                           amd64        Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP

rc  linux-modules-extra-5.0.0-7-generic   5.0.0-7.8                           amd64        Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP





$ sudo dpkg -l | grep -i ^rc | cut -d " " -f 3 

linux-image-5.0.0-7-generic

linux-modules-5.0.0-7-generic

linux-modules-extra-5.0.0-7-generic

share|improve this answer

answered 5 hours ago

RinzwindRinzwind

211k28406541

answered 5 hours ago

RinzwindRinzwind

211k28406541

answered 5 hours ago

RinzwindRinzwind

211k28406541