I am trying to join to files with dramatically different sizes (file 1: 1 column - 9000 rows, file 2: 13 cols, 26 million rows). I can't seem to get join to work. I have check to ensure that there are matches and have tried subsamples that work. The -a filenum flag lists all the rows, so join is... (4 Replies)
Hi,
I am trying to write a script that will use ls on a directory and list the files one at a time and their size. If the size is 0 i want it to ask me if I want to delete it (yes or no). If I say yes, I want it to delete but it won't know what the file name is just from running from the script.... (2 Replies)
Hi ,,
i have the below file...
D 2342135
B 214236
C argjlksd
V lskjrghaklsr
C slkrgj
B sdg4tsd
E aslkgjlkasg
i want to sort the lines into different files based on the starting letter of the line. so that i have different files for lines starting with a letter.
thanks (1 Reply)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Which files in /usr/bin whose names begin with “p” are python scripts? Store the numbered results in... (3 Replies)
Hi guys, I hope you can enlight me with a script I'm doing for Solaris 10.
Script goes like this:
#!/usr/bin/bash
fechahoy=`perl /export/home/info/John/fechamod.pl`
fechayer=`perl /export/home/info/John/fecha.pl`
echo $fechahoy
echo $fechayer
DAT1=`ssh ivt@blahblah ls -la... (1 Reply)
Hi,
I have lets say 10 files , I need to process them one by one.
So I need a command to get one file name at a time to process it into a variable
Example
Files
P1111.dat
P3344.dat
S344.dat
...
v_file_name = 'p111.dat' .. I will rename it to something after processing
... (1 Reply)
Need assistance in getting File size for the List of files using perl script . I have writtern 2 codes. One of them gives me the list of files and 2nd one give me the size for only 1 file.
I dont know how to club both of them to get the list of files with its size .
#!/usr/bin/perl -w... (11 Replies)
Good afternoon all,
I want to ask how to change some letter in my file with other letter in spesific line
eg.
data.txt
1
1
1
0
0
0
0
for example i want to change the 4th line with character 1.
How could I do it by SED or AWK.
I have tried to run this code but actually did not... (3 Replies)
Hi.
I'm trying to sort a list of items in a file alphabetically but starting from the letter 'X'. For instance if I had the following file;
test.txt
Z
A
T
W
Y
B
S
X
I would like the output to look like;
X
Y (8 Replies)
Discussion started by: mmab
8 Replies
LEARN ABOUT DEBIAN
sulogin
SULOGIN(8) Linux System Administrator's Manual SULOGIN(8)NAME
sulogin - Single-user login
SYNOPSIS
sulogin [ -e ] [ -p ] [ -t SECONDS ] [ TTY ]
DESCRIPTION
sulogin is invoked by init(8) when the system goes into single user mode. (This is done through an entry in inittab(5).) Init also tries
to execute sulogin when the boot loader (e.g., grub(8)) passes it the -b option.
The user is prompted
Give root password for system maintenance
(or type Control-D for normal startup):
If the root account is locked, no password prompt is displayed and sulogin behaves as if the correct password were entered.
sulogin will be connected to the current terminal, or to the optional device that can be specified on the command line (typically /dev/con-
sole).
If the -t option is used then the program only waits the given number of seconds for user input.
If the -p option is used then the single-user shell is invoked with a dash as the first character in argv[0]. This causes the shell
process to behave as a login shell. The default is not to do this, so that the shell will not read /etc/profile or $HOME/.profile at
startup.
After the user exits the single-user shell, or presses control-D at the prompt, the system will (continue to) boot to the default runlevel.
ENVIRONMENT VARIABLES
sulogin looks for the environment variable SUSHELL or sushell to determine what shell to start. If the environment variable is not set, it
will try to execute root's shell from /etc/passwd. If that fails it will fall back to /bin/sh.
This is very valuable together with the -b option to init. To boot the system into single user mode, with the root file system mounted
read/write, using a special "fail safe" shell that is statically linked (this example is valid for the LILO bootprompt)
boot: linux -b rw sushell=/sbin/sash
FALLBACK METHODS
sulogin checks the root password using the standard method (getpwnam) first. Then, if the -e option was specified, sulogin examines these
files directly to find the root password:
/etc/passwd,
/etc/shadow (if present)
If they are damaged or nonexistent, sulogin will start a root shell without asking for a password. Only use the -e option if you are sure
the console is physically protected against unauthorized access.
AUTHOR
Miquel van Smoorenburg <miquels@cistron.nl>
SEE ALSO init(8), inittab(5).
17 Jan 2006 SULOGIN(8)