explain the commands below Post: 302265745

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

can anyone explain this?

:start /@~/{ h s/$.*$@~.*$/\1/ s/@~$// s/@~/\ /g p g s/.*@~$.*$/\1/ } //{ N s/\n/ / b start }

2. Programming

code that reads commands from the standard i/p and executes the commands

Hello all, i've written a small piece of code that will read commands from standard input and executes the commands. Its working fine and is execting the commands well. Accepting arguments too. e.g #mkdir <name of the directory> The problem is that its not letting me change the directory i.e...

3. Shell Programming and Scripting

Can BASH execute commands on a remote server when the commands are embedded in shell

I want to log into a remote server transfer over a new config and then backup the existing config, replace with the new config. I am not sure if I can do this with BASH scripting. I have set up password less login by adding my public key to authorized_keys file, it works. I am a little...

4. UNIX for Dummies Questions & Answers

Explain the difference between the commands cd ~smart and cd ~/smart

Is it possible for both commands to work?

5. Shell Programming and Scripting

Can anyone please explain this??

cur_fy=`grep "CONSOL" $GLDATA/parms/cur_fiscalyear.lis | awk '{print $2}' Here i don't understand "CONSOL" and awk'{print$2) Please help me out cur_fiscalyear.lis contents : DL 2011 MOL 2011 MV 2011 SF 2010 CONSOL 2011 MVU 2011

6. Shell Programming and Scripting

Please explain this

cat $BDDATA/svucon$i_bal_dup_email.dat ; uuencode $dup_in $dup_out here svucon$i_bal_dup_email.dat ??? and uuencode ?? Please use and tags when posting code, data or logs etc. to preserve formatting and enhance readability, thanks.

7. Shell Programming and Scripting

need explain

Dear unix team i'm user for a system build on unix system ,so we need to run a lot of scripts not in one sission but every script on the associated terminal , so the script name = the name of the terminal which will run this script on it . and someone create a batch that make as below : 1- but...

8. Shell Programming and Scripting

anyone can explain this?

why the case 2 will happen ? , ' should stop the history substitution ,shouldn't it? case 1 # echo "123"|sed '/123/!d' 123 case 2 # echo "123 > 456 > 1 > "|sed '/123/!d' -bash: !d': event not found case 3 # echo "123 > 456 > 12 > "|sed '/123/'\!d 123 # bash --version

9. UNIX for Dummies Questions & Answers

Explain perl formatting commands

Could you please tell the meaning of Below mentioned perl script lines: format OWNER_TOTAL = @< Owner Code @<<<<<<total: @#######.## @#######.## @#######.## @#######.## @#######.## @#######.## @#######.## @#######.## @#######.## @#######.## @###### #.## $prev_cust_type, $prev_owner_code,...

10. UNIX for Dummies Questions & Answers

How I can explain this?

Hi friends! I'm learning UNIX and I have a small question. Working with Shell, i put the name of one executable (in c language) + one number and it says this: $ gcc misterioso_4.c $ ./misterioso_4 6 got: , I can not find an answer in the manual because I havent applied any variable....

LEARN ABOUT LINUX

bootlogd

BOOTLOGD(8)						Linux System Administrator's Manual					       BOOTLOGD(8)

NAME

       bootlogd - record boot messages

SYNOPSIS

       /sbin/bootlogd [-c] [-d] [-r] [-s] [-v] [ -l logfile ] [ -p pidfile ]

DESCRIPTION

       Bootlogd  runs in the background and copies all strings sent to the /dev/console device to a logfile. If the logfile is not accessible, the
       messages will be kept in memory until it is.

OPTIONS

       -d     Do not fork and run in the background.

       -c     Attempt to write to the logfile even if it does not yet exist.  Without this option, bootlogd will wait for the  logfile	to  appear
	      before attempting to write to it.  This behavior prevents bootlogd from creating logfiles under mount points.

       -r     If there is an existing logfile called logfile rename it to logfile~ unless logfile~ already exists.

       -s     Ensure  that the data is written to the file after each line by calling fdatasync(3).  This will slow down a fsck(8) process running
	      in parallel.

       -v     Show version.

       -l logfile
	      Log to this logfile. The default is /var/log/boot.

       -p pidfile
	      Put process-id in this file. The default is no pidfile.

BUGS

       Bootlogd works by redirecting the console output from the console device.  (Consequently bootlogd requires PTY support in the  kernel  con-
       figuration.)   It  copies that output to the real console device and to a log file.  There is no standard way of ascertaining the real con-
       sole device if you have a new-style /dev/console device (major 5, minor 1) so bootlogd parses the kernel  command  line	looking  for  con-
       sole=... lines and deduces the real console device from that.  If that syntax is ever changed by the kernel, or a console type is used that
       bootlogd does not know about then bootlogd will not work.

AUTHOR

       Miquel van Smoorenburg, miquels@cistron.nl

SEE ALSO

       dmesg(8),fdatasync(3).

								   Jul 21, 2003 						       BOOTLOGD(8)