01-15-2009
If your shell is bash, execute 'man builtins'. Search for 'history'.
8 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Dear All
I had a UNIX ( Sun solaris ) os.
There are many user on that server. Now i want to find during last week who had log in to the sever and which commnad are executed by them?
I also want to from which IP they had log in to the server.
Is there any log file generated for user in... (5 Replies)
Discussion started by: jaydeep_sadaria
5 Replies
2. UNIX for Advanced & Expert Users
Team ,
using fc command we can get details of our history file .. Is it possible to get the same result for different user from root.. Actually I need to collect all the stuff from select users history file for day to day basis.
thanks in advance .. (2 Replies)
Discussion started by: rgpai9972
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3. UNIX for Dummies Questions & Answers
How do I pipe serveral commans that will list only the user ids, sort the output, and remove any duplice name entries for those that have logged in in the past month? Thanks! (1 Reply)
Discussion started by: CasperQuiet
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4. Shell Programming and Scripting
Hi,
I need to access a user's command history. However, the dilemma is that he is logged in and so his current history is not yet flushed to .bash_history file which gets flushed when he logs out. Is there a way I can still access his most recent history?
thank you,
S (4 Replies)
Discussion started by: sardare
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5. Shell Programming and Scripting
Hi,
I have a linux redhat 9 server and I am concerned about the security on that server.
I would like to be able to write a script that records all the commands that were typed at the command prompt before the user calls the 'history -c' command and deletes all the history.
I was thinking about... (4 Replies)
Discussion started by: mishkamima
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6. Solaris
Hi
We are sharing our envoirnment with our component teams. the plateform is SunOS 5.8 Generic_117350-41 sun4u sparc SUNW,Sun-Fire-V490.
All team logs in the domain with same user and perform activities.
Now for the system auditing purpose can somebody guide me how can I get the details when... (6 Replies)
Discussion started by: sukhvinder_Tm
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7. UNIX for Advanced & Expert Users
Hi all,
My need is :
1. To know who , when , which command used.
2. Local user should not delete this information.
I mean , with an example , i can say
i have a user user1
i need to give all the following permissions to user1, :
a. A specific directory other than his home... (3 Replies)
Discussion started by: linuxadmin
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8. UNIX for Dummies Questions & Answers
Hi all,
My need is :
1. To know who , when , which command used.
2. Local user should not delete this information.
I mean , with an example , i can say
i have a user user1
i need to give all the following permissions to user1, :
a. A specific directory other than his home... (1 Reply)
Discussion started by: sriky86
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LEARN ABOUT DEBIAN
system
SYSTEM(3) Linux Programmer's Manual SYSTEM(3)
NAME
system - execute a shell command
SYNOPSIS
#include <stdlib.h>
int system(const char *command);
DESCRIPTION
system() executes a command specified in command by calling /bin/sh -c command, and returns after the command has been completed. During
execution of the command, SIGCHLD will be blocked, and SIGINT and SIGQUIT will be ignored.
RETURN VALUE
The value returned is -1 on error (e.g., fork(2) failed), and the return status of the command otherwise. This latter return status is in
the format specified in wait(2). Thus, the exit code of the command will be WEXITSTATUS(status). In case /bin/sh could not be executed,
the exit status will be that of a command that does exit(127).
If the value of command is NULL, system() returns nonzero if the shell is available, and zero if not.
system() does not affect the wait status of any other children.
CONFORMING TO
C89, C99, POSIX.1-2001.
NOTES
If the _XOPEN_SOURCE feature test macro is defined (before including any header files), then the macros described in wait(2) (WEXITSTA-
TUS(), etc.) are made available when including <stdlib.h>.
As mentioned, system() ignores SIGINT and SIGQUIT. This may make programs that call it from a loop uninterruptible, unless they take care
themselves to check the exit status of the child. E.g.
while (something) {
int ret = system("foo");
if (WIFSIGNALED(ret) &&
(WTERMSIG(ret) == SIGINT || WTERMSIG(ret) == SIGQUIT))
break;
}
Do not use system() from a program with set-user-ID or set-group-ID privileges, because strange values for some environment variables might
be used to subvert system integrity. Use the exec(3) family of functions instead, but not execlp(3) or execvp(3). system() will not, in
fact, work properly from programs with set-user-ID or set-group-ID privileges on systems on which /bin/sh is bash version 2, since bash 2
drops privileges on startup. (Debian uses a modified bash which does not do this when invoked as sh.)
In versions of glibc before 2.1.3, the check for the availability of /bin/sh was not actually performed if command was NULL; instead it was
always assumed to be available, and system() always returned 1 in this case. Since glibc 2.1.3, this check is performed because, even
though POSIX.1-2001 requires a conforming implementation to provide a shell, that shell may not be available or executable if the calling
program has previously called chroot(2) (which is not specified by POSIX.1-2001).
It is possible for the shell command to return 127, so that code is not a sure indication that the execve(2) call failed.
SEE ALSO
sh(1), signal(2), wait(2), exec(3)
COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
2010-09-10 SYSTEM(3)