The 'read x' saves calling 'line', if your LINUX/UNIX has 'line' installed, else 'head -1'. I suspect 'head -1' is not fully equivalent to 'line', like when reading a fd with many commands, but the 'head -1' is equivalent, if an extra fork and exec, to 'read x' (both have a FILE* stdin that reads ahead, which is fine for throughput and reduced overhead but no good for reading the same fd with many commands). Bash is mostly just as handy with
Code:
(....)|while read x
do
...
done
as long as you do not, later, want variables set in there including x, as it is in a subshell. Sometimes a bash script can be fixed with just a more explicit sub-shell where the variable is read and used (only)):
Code:
....|(read x; ... $x ....)
It is an article of faith in bash that any ksh thing that malfunctions is a feature.
If I could make the $(...) echoing '...' out happen on demand, I could take a shot at seeing what and where it is writing that, but alas, it just comes and goes. I am not buying the mysql reaches up the stdin pipe theory. Pipes have a very few and bland set of behaviors, thank goodness.
I have been wishing for a revised stdio, unified FILE* library that would flush all output FILE* when blocking any, and read input ahead when blocking on other FILE*. Then, there would always be low latency, and fflush() or buffering restrictions like line or none would not be necessary for most programs, so you get good buffering during high throughput and yet low latency during data drought, all with no code. You would only need such controls when many threads/processes write the same fd or file, to avoid splitting/mixing lines/packets.
Hi all...
I've completed the task of deploying SSH over my 400 servers.
I don't know if i'm right or wrong, but ssh doesn't do any command-logging, does it?
Is there a app i can use to log all commands passed ( besides the usual .sh_history), whith no modification possible by the user, and how... (2 Replies)
Hi, I am trying to recollect the command used to log a file.
We use this command just before starting, say, installation. At the end you get a file capturing the series of commands you used during the course of time and sytems response.
Could anybody please help.
Thanks,
Dasa (3 Replies)
Does anyone have a simple method of logging all shell commands typed by a user (csh in our case)?
- I could enable auditing, but this would be overkill
- I could enable process accounting, but AFAIK, this does not log arguments
Thanks all. (2 Replies)
I am looking for a really good command logging tool to improve the auditing of my servers. I have previously used snoopy but this is currently a bit flaky and causing serious problems for me, it doesn't look like it's been maintained since 2004, it didn't even want to compile until I added -fPIC... (1 Reply)
Hi.
I have the script shown below. If I execute it form the command line it seems to work properly, but when I fun it using the unix "at" command
"at -m now < ./kill-at-job.sh"
It appears to hang. Below is the script, the input file, and the execution as reported in the e-mail from the "at"... (3 Replies)
I'm looking at allowing remote telnet into my server.
like any security-minded administrator, I want to log what my users type on the telnet session.
I'm using the script command to generate transcripts of the users session.
I have /etc/profile set to automatically start the script command... (2 Replies)
Is it possible to store all standard-out of a bash script and the binaries it calls in a log file AND still display the stdout on screen?
I know this is possible to store ALL stdout/stderr of a script to a single log file like:
exec 1>&${logFile}
exec 2>&1
But running a script with the... (3 Replies)
HI ,
I have a simple script that moves files from one folder to another folder, I have already done the open-ssh server settings and the script is working fine and is able to transfer the files from one folder to another but right now I myself execute this script by using my creditianls to... (4 Replies)
I searched the forums for command logging and the user "Driver" seemed to provide a script for logging shell commands with related info like date and time. The subject was "logging command invocations -cmdlog" . I would be interested in this script.
Thanks (0 Replies)
BASH Gurus: Anyone know how to append continuous output command appending to a file, but limit that file to no more than 20 lines? The program I have running is simply monitoring my UDP port 53 for incoming packets endlessly. I just need to keep this file from going over 20 lines. Once the file... (3 Replies)
Discussion started by: scorpius2k1
3 Replies
LEARN ABOUT DEBIAN
qpsmtpd-forkserver
qpsmtpd-forkserver(8) System Manager's Manual qpsmtpd-forkserver(8)NAME
qpsmtpd-forkserver - Fork-on-demand server for qpsmtpd
SYNOPSIS
qpsmtpd-forkserver [options]
DESCRIPTION
qpsmtpd-forkserver is the qpsmtpd frontend script which binds to the SMTP TCP socket and forks as clients connect.
OPTIONS --port port, -p port
Binds to a specific port, instead of the default 2525.
--user user, -u user
On startup, switch to run as user instead of the starting user. Applies only when started as root (as is normal when listening on
port 25).
--limit-connections limit, -c limit
Accept at most limit simultaneous connections. Inbound connections beyondthis limit will be deferred or refused.
--max-from-ip limit, -m limit
Accept at most limit simultaneous connections from any given IP address; does not override --limit-connections, if set.
--listen-address addr, -l addr
Bind to the local address addr, instead of the default behavior of binding to all interfaces. Can be specified multiple times to
bind to more than one interface or local address.
--detach, -d
Detach from the controlling terminal at startup, to run as a standalone daemon. See also --pid-file.
--pid-file filename
Upon startup, and after daemonizing if applicable, write the process ID to filename, for use by sysvinit control scripts or similar
utilities.
AUTHOR
Ask Bjorn Hansen <ask@develooper.com>
http://smtpd.develooper.com/
qpsmtpd-forkserver(8)
12-12-2011
