I have completely blanked out on this and I have done it a million times. I need to modify some tables in unix. What is the command for opening/viewing the tables?
Thanks so much. :o (2 Replies)
I have a file (called CORE) that is a dump created by a crashing process. This file, I believe, is in "binary" form, so when I try to use cat, more, or vi on it, it has a bunch of garbage. Is there anything I can use to "read" or view this file just like I might a non-binary file? I am running... (2 Replies)
Hi,
Can someone help me figure out how to view directory content while I navigate directories (without having to go to the actual directory and "ls-ing" it)? Is there some keyboard shortcut for this? For instance, it would be useful if I could see the content of a directory when I'm copying... (2 Replies)
Hi,
I have a program that get a directory name from the user, then the program should go through one by one of the file, asking the user whether to move it to another folder. I tried to list the time of the file one by one. But it seems like it doesn't work. The code is as follow:
check()
{... (10 Replies)
Hey,
I know the head and tail function is to view like the top or bottom lines for each file. But lets say I want to view the top/bottom 100 or top/bottom 1000 for a file. whats the command that I use to do this?
thanks (2 Replies)
Hi all,
When I use BDF command on this particular server, it outputs mostly normal stuff. However, there is one directory it can't read at all.
Also, it doesn't seem to exist.
When I BDF my file system with a small panic script (it happens even if you use just the bdf command):
As you... (17 Replies)
I have a file name as logfiles_tar.tgz. How can I view the contents of the log files present in logfiles_tar.tgz ? Any help would be really appreciated.
Thanks (3 Replies)
What is the command line for viewing the sizes(lines and bytes)of all the files in your present working directory?
Is it
>ls -la (2 Replies)
Discussion started by: Payton2704
2 Replies
LEARN ABOUT DEBIAN
sleepenh
SLEEPENH(1) General Commands Manual SLEEPENH(1)NAME
sleepenh - an enhanced sleep program.
SYNOPSIS
sleepenh [initial-time] sleep-time
DESCRIPTION
sleepenh is a program that can be used when there is a need to execute some functions periodically in a shell script. It was not designed
to be accurate for a single sleep, but to be accurate in a sequence of consecutive sleeps.
After a successful execution, it returns to stdout the timestamp it finished running, that can be used as initial-time to a successive exe-
cution of sleepenh.
OPTIONS
There are no command line options. Run it without any option to get a brief help and version.
ARGUMENTS
sleep-time is a real number in seconds, with microseconds resolution (1 minute, 20 seconds and 123456 microseconds would be 80.123456).
initial-time is a real number in seconds, with microseconds resolution. This number is system dependent. In GNU/Linux systems, it is the
number of seconds since midnight 1970-01-01 GMT. Do not try to get a good value of initial-time. Use the value supplied by a previous exe-
cution of sleepenh.
If you don't specify initial-time, it is assumed the current-time.
EXIT STATUS
An exit status greater or equal to 10 means failure. Known exit status:
0 Success.
1 Success. There was no need to sleep. (means that initial-time + sleep-time was greater than current-time).
10 Failure. Missing command line arguments.
11 Failure. Did not receive SIGALRM.
12 Failure. Argument is not a number.
13 Failure. System error, could not get current time.
USAGE EXAMPLE
Suppose you need to send the char 'A' to the serial port ttyS0 every 4 seconds. This will do that:
#!/bin/sh
TIMESTAMP=`sleepenh 0`
while true; do
# send the byte to ttyS0
echo -n "A" > /dev/ttyS0;
# just print a nice message on screen
echo -n "I sent 'A' to ttyS0, time now is ";
sleepenh 0;
# wait the required time
TIMESTAMP=`sleepenh $TIMESTAMP 4.0`;
done
HINT
This program can be used to get the current time. Just execute:
sleepenh 0
BUGS
It is not accurate for a single sleep. Short sleep-times will also not be accurate.
SEE ALSO date(1), sleep(1).
AUTHOR
This manual page was written by Pedro Zorzenon Neto.
2008/04/20 SLEEPENH(1)