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Top Forums UNIX for Dummies Questions & Answers How to check if an application has been installed on a unix/linux box? Post 302533967 by sk1418 on Sunday 26th of June 2011 06:18:30 AM
Old 06-26-2011
How to check if an application has been installed on a unix/linux box?

hi, guys,

now I face a problem. I have developed an application, and when it starts, it shall check if an application has been installed on the running linux/unix. If result is positive, i do something with the application command.

just as an example: I want to check if sshd has been installed. this requirement is supposed to be distribution independent. So
on my Arch box, usually "sshd" can be found at /etc/rc.d/sshd
however on a debian/ubuntu box, it usually is located at /etc/init.d/sshd
is there a general way, say give me the "/etc/rc.d" or "/etc/init.d" directory on the system?

thanx
 

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pam_allow(5)						Standards, Environments, and Macros					      pam_allow(5)

NAME
pam_allow - PAM authentication, account, session and password management PAM module to allow operations SYNOPSIS
pam_allow.so.1 DESCRIPTION
The pam_allow module implements all the PAM service module functions and returns PAM_SUCCESS for all calls. Opposite functionality is available in the pam_deny(5) module. Proper Solaris authentication operation requires pam_unix_cred(5) be stacked above pam_allow. The following options are interpreted: debug Provides syslog(3C) debugging information at the LOG_AUTH | LOG_DEBUG level. ERRORS
PAM_SUCCESS is always returned. EXAMPLES
Example 1 Allowing ssh none The following example is a pam.conf fragment that illustrates a sample for allowing ssh none authentication: sshd-none auth required pam_unix_cred.so.1 sshd-none auth sufficient pam_allow.so.1 sshd-none account sufficient pam_allow.so.1 sshd-none session sufficient pam_allow.so.1 sshd-none password sufficient pam_allow.so.1 Example 2 Allowing Kiosk Automatic Login Service The following is example is a pam.conf fragment that illustrates a sample for allowing gdm kiosk auto login: gdm-autologin auth required pam_unix_cred.so.1 gdm-autologin auth sufficient pam_allow.so.1 ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ |MT Level |MT-Safe with exceptions | +-----------------------------+-----------------------------+ SEE ALSO
libpam(3LIB), pam(3PAM), pam_sm(3PAM), syslog(3C), pam.conf(4), attributes(5), pam_deny(5), pam_unix_cred(5) NOTES
The interfaces in libpam(3LIB) are MT-Safe only if each thread within the multi-threaded application uses its own PAM handle. This module is intended to be used to either allow access to specific services names, or to all service names not specified (by specifying it as the default service stack). SunOS 5.11 25 Aug 2005 pam_allow(5)
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