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How to add the real hostname in the beginning of Linux cli command

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How to add the real hostname in the beginning of Linux cli command

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

2

we have redhat servers - 7.2

the following output from sar print all relevant details as the following

sar -p -d 1 1


07:16:35 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util
07:16:36 PM sda 13.00 0.00 120.00 9.23 0.04 3.08 1.38 1.80
07:16:36 PM vg_livecd-lv_root 15.00 0.00 120.00 8.00 0.05 3.07 1.27 1.90
07:16:36 PM vg_livecd-lv_swap 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07:16:36 PM vg_livecd-lv_home 0.00 0.00 0.00 0.00 0.00 0.00 

we want now to add the hostname of the machine in the beginning of each line

first we found the hostname

hostname=` hostname `

echo $hostname

server_mng14

expected results

sar -p -d 1 1


server_mng14 07:16:35 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util
server_mng14 07:16:36 PM sda 13.00 0.00 120.00 9.23 0.04 3.08 1.38 1.80
server_mng14 07:16:36 PM vg_livecd-lv_root 15.00 0.00 120.00 8.00 0.05 3.07 1.27 1.90
server_mng14 07:16:36 PM vg_livecd-lv_swap 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
server_mng14 07:16:36 PM vg_livecd-lv_home 0.00 0.00 0.00 0.00 0.00 0.00 

what we need to pipe after - sar -p -d 1 1 in order to get the hostname of the beginning of each line?

bash shell-script awk sed perl

share|improve this question

edited 8 hours ago

muru

44.9k55 gold badges111111 silver badges184184 bronze badges

asked 8 hours ago

yaelyael

3,11588 gold badges4646 silver badges9999 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  sar on my system shows Linux 4.4.38 (comp) 09/24/2019 _x86_64_ (8 CPU) header on the top but it's missing in your example. What version of sar do you use?
  
  – Arkadiusz Drabczyk
  8 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  sysstat version 10.1.5 (C) Sebastien Godard (sysstat <at> orange.fr)
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Ok, I use 11.2.1.1. Are you sure there is no header in output of sar or you just removed it?
  
  – Arkadiusz Drabczyk
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I not understand why this is important because what I want is to add the hostname in the first field of the output , it could be any other command
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is important because you post incorrect input that only causes confusion and expect people to help you. And the header already contains hostname so comp Linux 4.4.38 (comp) 09/24/2019 _x86_64_ (8 CPU) looks weird.
  
  – Arkadiusz Drabczyk
  8 hours ago
  
  

  
  
  
  

 | 
show 1 more comment

2

we have redhat servers - 7.2

the following output from sar print all relevant details as the following

sar -p -d 1 1


07:16:35 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util
07:16:36 PM sda 13.00 0.00 120.00 9.23 0.04 3.08 1.38 1.80
07:16:36 PM vg_livecd-lv_root 15.00 0.00 120.00 8.00 0.05 3.07 1.27 1.90
07:16:36 PM vg_livecd-lv_swap 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07:16:36 PM vg_livecd-lv_home 0.00 0.00 0.00 0.00 0.00 0.00 

we want now to add the hostname of the machine in the beginning of each line

first we found the hostname

hostname=` hostname `

echo $hostname

server_mng14

expected results

sar -p -d 1 1


server_mng14 07:16:35 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util
server_mng14 07:16:36 PM sda 13.00 0.00 120.00 9.23 0.04 3.08 1.38 1.80
server_mng14 07:16:36 PM vg_livecd-lv_root 15.00 0.00 120.00 8.00 0.05 3.07 1.27 1.90
server_mng14 07:16:36 PM vg_livecd-lv_swap 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
server_mng14 07:16:36 PM vg_livecd-lv_home 0.00 0.00 0.00 0.00 0.00 0.00 

what we need to pipe after - sar -p -d 1 1 in order to get the hostname of the beginning of each line?

bash shell-script awk sed perl

share|improve this question

edited 8 hours ago

muru

44.9k55 gold badges111111 silver badges184184 bronze badges

asked 8 hours ago

yaelyael

3,11588 gold badges4646 silver badges9999 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  sar on my system shows Linux 4.4.38 (comp) 09/24/2019 _x86_64_ (8 CPU) header on the top but it's missing in your example. What version of sar do you use?
  
  – Arkadiusz Drabczyk
  8 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  sysstat version 10.1.5 (C) Sebastien Godard (sysstat <at> orange.fr)
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Ok, I use 11.2.1.1. Are you sure there is no header in output of sar or you just removed it?
  
  – Arkadiusz Drabczyk
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I not understand why this is important because what I want is to add the hostname in the first field of the output , it could be any other command
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is important because you post incorrect input that only causes confusion and expect people to help you. And the header already contains hostname so comp Linux 4.4.38 (comp) 09/24/2019 _x86_64_ (8 CPU) looks weird.
  
  – Arkadiusz Drabczyk
  8 hours ago
  
  

  
  
  
  

 | 
show 1 more comment

we have redhat servers - 7.2

the following output from sar print all relevant details as the following

sar -p -d 1 1


07:16:35 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util
07:16:36 PM sda 13.00 0.00 120.00 9.23 0.04 3.08 1.38 1.80
07:16:36 PM vg_livecd-lv_root 15.00 0.00 120.00 8.00 0.05 3.07 1.27 1.90
07:16:36 PM vg_livecd-lv_swap 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07:16:36 PM vg_livecd-lv_home 0.00 0.00 0.00 0.00 0.00 0.00 

we want now to add the hostname of the machine in the beginning of each line

first we found the hostname

hostname=` hostname `

echo $hostname

server_mng14

expected results

sar -p -d 1 1


server_mng14 07:16:35 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util
server_mng14 07:16:36 PM sda 13.00 0.00 120.00 9.23 0.04 3.08 1.38 1.80
server_mng14 07:16:36 PM vg_livecd-lv_root 15.00 0.00 120.00 8.00 0.05 3.07 1.27 1.90
server_mng14 07:16:36 PM vg_livecd-lv_swap 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
server_mng14 07:16:36 PM vg_livecd-lv_home 0.00 0.00 0.00 0.00 0.00 0.00 

what we need to pipe after - sar -p -d 1 1 in order to get the hostname of the beginning of each line?

bash shell-script awk sed perl

share|improve this question

edited 8 hours ago

muru

44.9k55 gold badges111111 silver badges184184 bronze badges

asked 8 hours ago

yaelyael

3,11588 gold badges4646 silver badges9999 bronze badges

sar -p -d 1 1


07:16:35 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util
07:16:36 PM sda 13.00 0.00 120.00 9.23 0.04 3.08 1.38 1.80
07:16:36 PM vg_livecd-lv_root 15.00 0.00 120.00 8.00 0.05 3.07 1.27 1.90
07:16:36 PM vg_livecd-lv_swap 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07:16:36 PM vg_livecd-lv_home 0.00 0.00 0.00 0.00 0.00 0.00 

hostname=` hostname `

echo $hostname

server_mng14

sar -p -d 1 1


server_mng14 07:16:35 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util
server_mng14 07:16:36 PM sda 13.00 0.00 120.00 9.23 0.04 3.08 1.38 1.80
server_mng14 07:16:36 PM vg_livecd-lv_root 15.00 0.00 120.00 8.00 0.05 3.07 1.27 1.90
server_mng14 07:16:36 PM vg_livecd-lv_swap 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
server_mng14 07:16:36 PM vg_livecd-lv_home 0.00 0.00 0.00 0.00 0.00 0.00 

share|improve this question

edited 8 hours ago

muru

44.9k55 gold badges111111 silver badges184184 bronze badges

asked 8 hours ago

yaelyael

3,11588 gold badges4646 silver badges9999 bronze badges

share|improve this question

edited 8 hours ago

muru

44.9k55 gold badges111111 silver badges184184 bronze badges

asked 8 hours ago

yaelyael

3,11588 gold badges4646 silver badges9999 bronze badges

edited 8 hours ago

muru

44.9k55 gold badges111111 silver badges184184 bronze badges

edited 8 hours ago

muru

44.9k55 gold badges111111 silver badges184184 bronze badges

asked 8 hours ago

yaelyael

3,11588 gold badges4646 silver badges9999 bronze badges

asked 8 hours ago

yaelyael

3,11588 gold badges4646 silver badges9999 bronze badges

2 Answers
2

active

oldest

votes

5

You could run:

sar -p -d 1 1 | sed "s/^/$(hostname) /"

share|improve this answer

answered 8 hours ago

rusty shacklefordrusty shackleford

1,61922 silver badges1717 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  what in case I run the sar cli on remote machine , so how in this case I set the hostname of remote machine inside sed?
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  ssh user@remote-machine 'sar -p -d 1 1 | sed "s/^/$(hostname) /"'
  
  – rusty shackleford
  8 hours ago
  

  
  
  
  

add a comment
 | 

5

You can do:

sar -p -d 1 1 | sed "s,^,$(hostname) ,"

if you want to prepend hostname to only non-empty lines:

sar -p -d 1 1 | sed -E "s,^(.+),$(hostname) 1,"

share|improve this answer

answered 8 hours ago

Arkadiusz DrabczykArkadiusz Drabczyk

10k33 gold badges2222 silver badges3737 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  what in case I run the sar cli on remote machine , so how in this case I set the hostname of remote machine inside sed?
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How do you run it? Do you use SSH?
  
  – Arkadiusz Drabczyk
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  example - res=` ssh $remote_machine "sar -p -d 1 1" , then echo "$res" | ....
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @yael: your example is not correct. Fix formatting.
  
  – Arkadiusz Drabczyk
  8 hours ago
  

  
  
  
  

add a comment
 | 

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5

You could run:

sar -p -d 1 1 | sed "s/^/$(hostname) /"

share|improve this answer

answered 8 hours ago

rusty shacklefordrusty shackleford

1,61922 silver badges1717 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  what in case I run the sar cli on remote machine , so how in this case I set the hostname of remote machine inside sed?
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  ssh user@remote-machine 'sar -p -d 1 1 | sed "s/^/$(hostname) /"'
  
  – rusty shackleford
  8 hours ago
  

  
  
  
  

add a comment
 | 

5

You could run:

sar -p -d 1 1 | sed "s/^/$(hostname) /"

share|improve this answer

answered 8 hours ago

rusty shacklefordrusty shackleford

1,61922 silver badges1717 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  what in case I run the sar cli on remote machine , so how in this case I set the hostname of remote machine inside sed?
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  ssh user@remote-machine 'sar -p -d 1 1 | sed "s/^/$(hostname) /"'
  
  – rusty shackleford
  8 hours ago
  

  
  
  
  

add a comment
 | 

You could run:

sar -p -d 1 1 | sed "s/^/$(hostname) /"

share|improve this answer

answered 8 hours ago

rusty shacklefordrusty shackleford

1,61922 silver badges1717 bronze badges

sar -p -d 1 1 | sed "s/^/$(hostname) /"

share|improve this answer

answered 8 hours ago

rusty shacklefordrusty shackleford

1,61922 silver badges1717 bronze badges

answered 8 hours ago

rusty shacklefordrusty shackleford

1,61922 silver badges1717 bronze badges

answered 8 hours ago

rusty shacklefordrusty shackleford

1,61922 silver badges1717 bronze badges

5

You can do:

sar -p -d 1 1 | sed "s,^,$(hostname) ,"

if you want to prepend hostname to only non-empty lines:

sar -p -d 1 1 | sed -E "s,^(.+),$(hostname) 1,"

share|improve this answer

answered 8 hours ago

Arkadiusz DrabczykArkadiusz Drabczyk

10k33 gold badges2222 silver badges3737 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  what in case I run the sar cli on remote machine , so how in this case I set the hostname of remote machine inside sed?
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How do you run it? Do you use SSH?
  
  – Arkadiusz Drabczyk
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  example - res=` ssh $remote_machine "sar -p -d 1 1" , then echo "$res" | ....
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @yael: your example is not correct. Fix formatting.
  
  – Arkadiusz Drabczyk
  8 hours ago
  

  
  
  
  

add a comment
 | 

5

You can do:

sar -p -d 1 1 | sed "s,^,$(hostname) ,"

if you want to prepend hostname to only non-empty lines:

sar -p -d 1 1 | sed -E "s,^(.+),$(hostname) 1,"

share|improve this answer

answered 8 hours ago

Arkadiusz DrabczykArkadiusz Drabczyk

10k33 gold badges2222 silver badges3737 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  what in case I run the sar cli on remote machine , so how in this case I set the hostname of remote machine inside sed?
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How do you run it? Do you use SSH?
  
  – Arkadiusz Drabczyk
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  example - res=` ssh $remote_machine "sar -p -d 1 1" , then echo "$res" | ....
  
  – yael
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @yael: your example is not correct. Fix formatting.
  
  – Arkadiusz Drabczyk
  8 hours ago
  

  
  
  
  

add a comment
 | 

You can do:

sar -p -d 1 1 | sed "s,^,$(hostname) ,"

if you want to prepend hostname to only non-empty lines:

sar -p -d 1 1 | sed -E "s,^(.+),$(hostname) 1,"

share|improve this answer

answered 8 hours ago

Arkadiusz DrabczykArkadiusz Drabczyk

10k33 gold badges2222 silver badges3737 bronze badges

sar -p -d 1 1 | sed "s,^,$(hostname) ,"

sar -p -d 1 1 | sed -E "s,^(.+),$(hostname) 1,"

share|improve this answer

answered 8 hours ago

Arkadiusz DrabczykArkadiusz Drabczyk

10k33 gold badges2222 silver badges3737 bronze badges

answered 8 hours ago

Arkadiusz DrabczykArkadiusz Drabczyk

10k33 gold badges2222 silver badges3737 bronze badges

answered 8 hours ago

Arkadiusz DrabczykArkadiusz Drabczyk

10k33 gold badges2222 silver badges3737 bronze badges