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0

#!/bin/bash

value=$(</var/www/sym_monitor/man.txt)





if [ "$value" == "true" ]; then



     ps -ef|grep sym |grep -v grep |awk '{ print $2 }'|sudo  xargs kill -9;





(cd /var/www/symmetric-ds-3.1.6/bin;sudo ./sym --port 8082 --server);



fi

The second command inside brackets is not executing any idea why this is happening?

linux ubuntu shell-script

share|improve this question

edited Feb 25 '13 at 12:28

user1597811

asked Feb 18 '13 at 11:43

user1597811user1597811

1055

bumped to the homepage by Community♦ 9 mins ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What is the name of the script?
  
  – choroba
  Feb 18 '13 at 11:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  restart.sh is the name of the script.
  
  – user1597811
  Feb 18 '13 at 11:54
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are you getting any error messages? How do you execute the script?
  
  – Dennis
  Feb 18 '13 at 12:20
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Then why do you use sudo?
  
  – Dennis
  Feb 18 '13 at 14:48
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Why? Without additional parameters, sudo is used to execute a command as the root user. Inside a script executed from root's crontab, sudo can't have that effect.
  
  – Dennis
  Feb 25 '13 at 12:48
  

  
  
  
  

 | 
show 6 more comments

0

#!/bin/bash

value=$(</var/www/sym_monitor/man.txt)





if [ "$value" == "true" ]; then



     ps -ef|grep sym |grep -v grep |awk '{ print $2 }'|sudo  xargs kill -9;





(cd /var/www/symmetric-ds-3.1.6/bin;sudo ./sym --port 8082 --server);



fi

The second command inside brackets is not executing any idea why this is happening?

linux ubuntu shell-script

share|improve this question

edited Feb 25 '13 at 12:28

user1597811

asked Feb 18 '13 at 11:43

user1597811user1597811

1055

bumped to the homepage by Community♦ 9 mins ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What is the name of the script?
  
  – choroba
  Feb 18 '13 at 11:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  restart.sh is the name of the script.
  
  – user1597811
  Feb 18 '13 at 11:54
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are you getting any error messages? How do you execute the script?
  
  – Dennis
  Feb 18 '13 at 12:20
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Then why do you use sudo?
  
  – Dennis
  Feb 18 '13 at 14:48
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Why? Without additional parameters, sudo is used to execute a command as the root user. Inside a script executed from root's crontab, sudo can't have that effect.
  
  – Dennis
  Feb 25 '13 at 12:48
  

  
  
  
  

 | 
show 6 more comments

#!/bin/bash

value=$(</var/www/sym_monitor/man.txt)





if [ "$value" == "true" ]; then



     ps -ef|grep sym |grep -v grep |awk '{ print $2 }'|sudo  xargs kill -9;





(cd /var/www/symmetric-ds-3.1.6/bin;sudo ./sym --port 8082 --server);



fi

The second command inside brackets is not executing any idea why this is happening?

linux ubuntu shell-script

share|improve this question

edited Feb 25 '13 at 12:28

user1597811

asked Feb 18 '13 at 11:43

user1597811user1597811

1055

#!/bin/bash

value=$(</var/www/sym_monitor/man.txt)





if [ "$value" == "true" ]; then



     ps -ef|grep sym |grep -v grep |awk '{ print $2 }'|sudo  xargs kill -9;





(cd /var/www/symmetric-ds-3.1.6/bin;sudo ./sym --port 8082 --server);



fi

share|improve this question

edited Feb 25 '13 at 12:28

user1597811

asked Feb 18 '13 at 11:43

user1597811user1597811

1055

share|improve this question

edited Feb 25 '13 at 12:28

user1597811

asked Feb 18 '13 at 11:43

user1597811user1597811

1055

asked Feb 18 '13 at 11:43

user1597811user1597811

1055

asked Feb 18 '13 at 11:43

user1597811user1597811

1055

1 Answer
1

active

oldest

votes

0

You must use an absolute path with sudo, for security reasons:

( sudo /var/www/symmetric-ds-3.1.6/bin/sym --port 8082 --server );

Check the output of sudo -l to confirm. From the sudoers man page (1.7.x):

A Cmnd_List is a list of one or more commandnames, directories, and
other aliases. A commandname is a fully qualified filename which may
include shell-style wildcards (see the Wildcards section below).

sudo xargs works because xargs is (almost certainly) found in a trusted path (/usr/bin).

Also, check out pgrep and pkill, it will save you the needless ps pipe acrobatics.

You have the potential for resource leaks and other unwanted behaviour with an unconditional kill -9, see https://unix.stackexchange.com/questions/8916/why-not-kill-9-a-process .

Update you've added that you run this via root's crontab -- root has no need to use sudo, and in some cases root may be prevented from running sudo, check what sudo -l says when you are root. If you want to to be able to start a program (that doesn't switch its own uid) as a specific userid then the common way is su - username -c "command" .

share|improve this answer

edited Apr 13 '17 at 12:37

Community♦

1

answered Feb 18 '13 at 11:58

mr.spuraticmr.spuratic

2,0731313

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Im trying these things. I will let you know after my cron got executed.
  
  – user1597811
  Feb 18 '13 at 12:19
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No it is not preventing the root from running sudo bcoz the first command also got sudo in it and it is working absolutely fine. Any more suggestions?
  
  – user1597811
  Feb 25 '13 at 6:32
  

  
  
  
  

add a comment | 

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0

You must use an absolute path with sudo, for security reasons:

( sudo /var/www/symmetric-ds-3.1.6/bin/sym --port 8082 --server );

Check the output of sudo -l to confirm. From the sudoers man page (1.7.x):

A Cmnd_List is a list of one or more commandnames, directories, and
other aliases. A commandname is a fully qualified filename which may
include shell-style wildcards (see the Wildcards section below).

sudo xargs works because xargs is (almost certainly) found in a trusted path (/usr/bin).

Also, check out pgrep and pkill, it will save you the needless ps pipe acrobatics.

You have the potential for resource leaks and other unwanted behaviour with an unconditional kill -9, see https://unix.stackexchange.com/questions/8916/why-not-kill-9-a-process .

Update you've added that you run this via root's crontab -- root has no need to use sudo, and in some cases root may be prevented from running sudo, check what sudo -l says when you are root. If you want to to be able to start a program (that doesn't switch its own uid) as a specific userid then the common way is su - username -c "command" .

share|improve this answer

edited Apr 13 '17 at 12:37

Community♦

1

answered Feb 18 '13 at 11:58

mr.spuraticmr.spuratic

2,0731313

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Im trying these things. I will let you know after my cron got executed.
  
  – user1597811
  Feb 18 '13 at 12:19
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No it is not preventing the root from running sudo bcoz the first command also got sudo in it and it is working absolutely fine. Any more suggestions?
  
  – user1597811
  Feb 25 '13 at 6:32
  

  
  
  
  

add a comment | 

0

You must use an absolute path with sudo, for security reasons:

( sudo /var/www/symmetric-ds-3.1.6/bin/sym --port 8082 --server );

Check the output of sudo -l to confirm. From the sudoers man page (1.7.x):

A Cmnd_List is a list of one or more commandnames, directories, and
other aliases. A commandname is a fully qualified filename which may
include shell-style wildcards (see the Wildcards section below).

sudo xargs works because xargs is (almost certainly) found in a trusted path (/usr/bin).

Also, check out pgrep and pkill, it will save you the needless ps pipe acrobatics.

You have the potential for resource leaks and other unwanted behaviour with an unconditional kill -9, see https://unix.stackexchange.com/questions/8916/why-not-kill-9-a-process .

Update you've added that you run this via root's crontab -- root has no need to use sudo, and in some cases root may be prevented from running sudo, check what sudo -l says when you are root. If you want to to be able to start a program (that doesn't switch its own uid) as a specific userid then the common way is su - username -c "command" .

share|improve this answer

edited Apr 13 '17 at 12:37

Community♦

1

answered Feb 18 '13 at 11:58

mr.spuraticmr.spuratic

2,0731313

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Im trying these things. I will let you know after my cron got executed.
  
  – user1597811
  Feb 18 '13 at 12:19
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No it is not preventing the root from running sudo bcoz the first command also got sudo in it and it is working absolutely fine. Any more suggestions?
  
  – user1597811
  Feb 25 '13 at 6:32
  

  
  
  
  

add a comment | 

You must use an absolute path with sudo, for security reasons:

( sudo /var/www/symmetric-ds-3.1.6/bin/sym --port 8082 --server );

Check the output of sudo -l to confirm. From the sudoers man page (1.7.x):

A Cmnd_List is a list of one or more commandnames, directories, and
other aliases. A commandname is a fully qualified filename which may
include shell-style wildcards (see the Wildcards section below).

sudo xargs works because xargs is (almost certainly) found in a trusted path (/usr/bin).

Also, check out pgrep and pkill, it will save you the needless ps pipe acrobatics.

You have the potential for resource leaks and other unwanted behaviour with an unconditional kill -9, see https://unix.stackexchange.com/questions/8916/why-not-kill-9-a-process .

Update you've added that you run this via root's crontab -- root has no need to use sudo, and in some cases root may be prevented from running sudo, check what sudo -l says when you are root. If you want to to be able to start a program (that doesn't switch its own uid) as a specific userid then the common way is su - username -c "command" .

share|improve this answer

edited Apr 13 '17 at 12:37

Community♦

1

answered Feb 18 '13 at 11:58

mr.spuraticmr.spuratic

2,0731313

( sudo /var/www/symmetric-ds-3.1.6/bin/sym --port 8082 --server );

share|improve this answer

edited Apr 13 '17 at 12:37

Community♦

1

answered Feb 18 '13 at 11:58

mr.spuraticmr.spuratic

2,0731313

edited Apr 13 '17 at 12:37

Community♦

1

edited Apr 13 '17 at 12:37

Community♦

1

answered Feb 18 '13 at 11:58

mr.spuraticmr.spuratic

2,0731313

answered Feb 18 '13 at 11:58

mr.spuraticmr.spuratic

2,0731313