03-16-2017
Warn Before Executing Particular Command
I'm running CentOS 6.8 and use bash. I would like a warning to appear to the user who runs the command "service httpd restart"
E.g.
# service httpd restart
are you sure y/n
n
#
(or if y, the command executes).
I looked into it a little but am not sure of the best approach. Aliases I believe are only one word, maybe aliasing the existing 'service' to a script which checks for the 'httpd restart' arguments?
I read shell functions are preferred over aliases, could a shell function do this? I wasn't sure if the shell function went in .bashrc and also needed an alias to work?
I also
read something about precmd() and preexec() functionality for bash, but wasn't sure if that would be required, or work, for this case?
Thanks for any info,
sg
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi
I was wondering if anyone knew the answer to this question?
I am trying to find a way of executing a command if a certain file is created in the same directory.
One way I thought about doing this was to create a FORTRAN program that continually searches for this file. If the file... (8 Replies)
Discussion started by: robbiegregg
8 Replies
2. Shell Programming and Scripting
Hi,
Couldnt find the right string" to search for a similar question..so dont know if this has been answered yet...problem is that I want to prepare a command with the requisite parameters passed as a string before executing it...eg: the ls command ..
I can pass "-l", "-t" as parameters and... (12 Replies)
Discussion started by: harman_6
12 Replies
3. Solaris
(I will not duplicate my post that I create in 'Programming' ( My post ), but the issue also (after C ) is related to Sun Solaris.)
I need to find the warning-codes to be used in the
#pragma warn..
C-code directives to suppress some compilation warnings.
More desciptive explanation you... (2 Replies)
Discussion started by: alex_5161
2 Replies
4. Programming
I am not able to find warn-codes that should be used in
#pragma warn -<code>
directive!:wall:
Could anybody advise where I can see a list of warnings with codes that (as I understand) should be 3-letters code?
I have a pro-C program that produces some warnings.
(Do not advise,... (4 Replies)
Discussion started by: alex_5161
4 Replies
5. UNIX for Dummies Questions & Answers
Hi All,
I am trying to execute a command using ssh as below.
ssh user123@servername "which ctmcontb"
It is gving the error as below
no ctmcontb in /usr/bin /usr/sbin /opt/sysadm/bin
Not sure from where the PATH is getting picked up.
But When I login direclty to the server I am... (5 Replies)
Discussion started by: anilreddy103
5 Replies
6. UNIX for Dummies Questions & Answers
hi guys
I have suse 11 sp1 and I have a lot of warn file filling / these are under /var/log
there's this big one
-rw-r----- 1 root root 3.9G Feb 1 10:28 warn
warn: ASCII text
and the others that are about 2.5 to 3MB - they are about 130 warn-*.bz2
-rw-r----- 1 root root 3.9G Feb... (2 Replies)
Discussion started by: karlochacon
2 Replies
7. Solaris
Hello Guys,
I am studying RBAC. So I create a role called sysadm and gave it the "shutdown" profile.
Now when I switch to that role, and execute the shutdown command
$ shutdown -y -g0 -i5
The system responds with :
shutdown: not found
Can anyone help me with this please?... (1 Reply)
Discussion started by: cjashu
1 Replies
8. AIX
Hello,
Can you please look into the below warning messages on AIX sys logs ? is this related to application ? do we need to do anything from OS side ?
we're running WAS on this LPAR.
Feb 12 03:47:48 myserver user:warn|warning IBM Java: JVMJ9VM134W The system fullcore option is set to... (5 Replies)
Discussion started by: System Admin 77
5 Replies
9. Red Hat
I'm running CentOS 6.8 and use bash. I would like a warning to appear to the user who runs the command "service httpd restart"
E.g.
# service httpd restart
are you sure y/n
n
#
(or if y, the command executes).
I looked into it a little but am not sure of the best approach. Aliases I... (2 Replies)
Discussion started by: spacegoose
2 Replies
10. UNIX for Advanced & Expert Users
When I tried to configure GNU make, I received:...
WARNING: Your system has neither waitpid() nor wait3().
Without one of these, signal handling is unreliable
You should be aware that running GNU make with -j
could result in erratic behavior.
...
What is that supposed to mean ? my spec:
... (1 Reply)
Discussion started by: abdulbadii
1 Replies
LEARN ABOUT CENTOS
apachectl
APACHECTL(8) apachectl APACHECTL(8)
NAME
apachectl - Apache HTTP Server Control Interface
SYNOPSIS
When acting in pass-through mode, apachectl can take all the arguments available for the httpd binary.
apachectl [ httpd-argument ]
When acting in SysV init mode, apachectl takes simple, one-word commands, defined below.
apachectl command
SUMMARY
apachectl is a front end to the Apache HyperText Transfer Protocol (HTTP) server. It is designed to help the administrator control the
functioning of the Apache httpd daemon.
The apachectl script can operate in two modes. First, it can act as a simple front-end to the httpd command that simply sets any necessary
environment variables and then invokes httpd, passing through any command line arguments. Second, apachectl can act as a SysV init script,
taking simple one-word arguments like start, restart, and stop, and translating them into appropriate signals to httpd.
If your Apache installation uses non-standard paths, you will need to edit the apachectl script to set the appropriate paths to the httpd
binary. You can also specify any necessary httpd command line arguments. See the comments in the script for details.
The apachectl script returns a 0 exit value on success, and >0 if an error occurs. For more details, view the comments in the script.
OPTIONS
Only the SysV init-style options are defined here. Other arguments are defined on the httpd manual page.
start Start the Apache httpd daemon. Gives an error if it is already running. This is equivalent to apachectl -k start.
stop Stops the Apache httpd daemon. This is equivalent to apachectl -k stop.
restart
Restarts the Apache httpd daemon. If the daemon is not running, it is started. This command automatically checks the configuration
files as in configtest before initiating the restart to make sure the daemon doesn't die. This is equivalent to apachectl -k
restart.
fullstatus
Displays a full status report from mod_status. For this to work, you need to have mod_status enabled on your server and a text-based
browser such as lynx available on your system. The URL used to access the status report can be set by editing the STATUSURL variable
in the script.
status Displays a brief status report. Similar to the fullstatus option, except that the list of requests currently being served is omit-
ted.
graceful
Gracefully restarts the Apache httpd daemon. If the daemon is not running, it is started. This differs from a normal restart in that
currently open connections are not aborted. A side effect is that old log files will not be closed immediately. This means that if
used in a log rotation script, a substantial delay may be necessary to ensure that the old log files are closed before processing
them. This command automatically checks the configuration files as in configtest before initiating the restart to make sure Apache
doesn't die. This is equivalent to apachectl -k graceful.
graceful-stop
Gracefully stops the Apache httpd daemon. This differs from a normal stop in that currently open connections are not aborted. A side
effect is that old log files will not be closed immediately. This is equivalent to apachectl -k graceful-stop.
configtest
Run a configuration file syntax test. It parses the configuration files and either reports Syntax Ok or detailed information about
the particular syntax error. This is equivalent to apachectl -t.
The following option was available in earlier versions but has been removed.
startssl
To start httpd with SSL support, you should edit your configuration file to include the relevant directives and then use the normal
apachectl start.
Apache HTTP Server 2005-08-26 APACHECTL(8)