Bash script + expect


 
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Old 08-06-2018
Bash script + expect

im very happy to back for this forum


I have servers with alias of double dns extentions:
sample:
servera.test.com
servera.test1.com


serverb.test.com
serverb.test1.com


I need to login to that severs and executing the set of commands


if test.com failed then try to login via test1.com


i'l create a bash script with expect and spawn but the issue is I cant able to do the if , else for giving the hostname with dns alias.


if anyone known, please help me on this ,after long and many years im starting my script knowledge.


thanks in advance.
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CGEXEC(1)							 libcgroup Manual							 CGEXEC(1)

NAME
cgexec - run the task in given control groups SYNOPSIS
cgexec [-h] [-g <controllers>:<path>] [--sticky] command [arguments] DESCRIPTION
The cgexec program executes the task command with arguments arguments in the given control groups. -g <controllers>:<path> defines the control groups in which the task will be run. controllers is a list of controllers and path is the relative path to control groups in the given controllers list. This flag can be used multiple times to define multiple pairs of lists of controllers and relative paths. Instead of the list of all mounted controllers, the wildcard b"*b" can be used. If this option is not used, cgexec will automatically place the task in the right cgroup based on /etc/cgrules.conf. If /etc/cgrules.conf configuration file is used, there can be used template names. Then the control group name contains a template in destination tag (see cgrules.conf (5)) and if the cgroup does not exist in execution time, it is created, based on /etc/cgcon- fig.conf specification. If the specifications are not present the group is created with the default kernel values. -h, --help Display this help and exit. --sticky If running the task command with this option, the daemon of service cgred (cgrulesengd process) does not change both the task of the command and the child tasks. Without this option, the daemon does not change the task of the command but it changes the child tasks to the right cgroup based on /etc/cgrules.conf automatically. EXAMPLES
cgexec -g *:test1 ls runs command ls in control group test1 in all mounted controllers. cgexec -g cpu,memory:test1 ls -l runs command ls -l in control group test1 in controllers cpu and memory. cgexec -g cpu,memory:test1 -g swap:test2 ls -l runs command ls -l in control group test1 in controllers cpu and memory and control group test2 in controller swap. ENVIRONMENT VARIABLES
CGROUP_LOGLEVEL controls verbosity of the tool. Allowed values are DEBUG, INFO, WARNING or ERROR. FILES
/etc/cgrules.conf default libcgroup configuration file SEE ALSO
cgrules.conf (5) Linux 2009-03-15 CGEXEC(1)