i'm pretty new to unix programming. i just wanna know how exactly fork(), waitpid() works. i have read some from the book, but it's still confusing. especially with those < 0 and == 0. plz help!!!! (1 Reply)
I am a newbie to Unix, I am using vi editor. I was able to print output to the screen using simple scripts. But when I tried a midlevel script I don't see anything on the screen and Cursor is just blinking when I type ./test11 filename. I have used chmod 755 also, but of no use. Any help would... (3 Replies)
Hi,
I'll get a file whose first line comprises of system name, timestamp of file creation and the seq number. System name and seq num I need to other computation. My requirement is, I'll have to check whether the timestamp is greater than current timestamp and also check if the timestamp is... (2 Replies)
Dear all
I am still bit new in shell script area.I am writing down a shell script which I guess somewhere wrong so please kindly correct it. I would be greatful for that.
What I actually want from this shell script is that it will move all the files one by one to another server which can be... (2 Replies)
plz help me with this question :
1111 | aaaa | pppp | 23/9/87
3333 | dddd | oooo | 6/9/8
4444 | gggg | rrrr | 5/8/9
5555 | qqqq | eeee
ans:
5555 | qqqq | eeee
depending upon how many "|" are in the question
be quick.. (8 Replies)
hi...
i want to print the below format by using shell scripting...plz help me
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
Thanking u in advance...
regards
ram (1 Reply)
can you help me to answer these questions ...
Q1 - Write shell script to print the following pattern:
1
22
333
4444
55555
Q2-
Write shell script to compare the strings, check and see if a command
line argument matched the string "net321" print on screen "** string
matches ** " if... (3 Replies)
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:
*I want to Write shell script to print the this pattern:
1
22
333
4444
55555
*I want to Write shell... (2 Replies)
Discussion started by: last exile
2 Replies
LEARN ABOUT OPENDARWIN
cut
CUT(1) BSD General Commands Manual CUT(1)NAME
cut -- select portions of each line of a file
SYNOPSIS
cut -b list [-n] [file ...]
cut -c list [file ...]
cut -f list [-d delim] [-s] [file ...]
DESCRIPTION
The cut utility selects portions of each line (as specified by list) from each file and writes them to the standard output. If no file argu-
ments are specified, or a file argument is a single dash ('-'), cut reads from from the standard input. The items specified by list can be
in terms of column position or in terms of fields delimited by a special character. Column numbering starts from 1.
The list option argument is a comma or whitespace separated set of increasing numbers and/or number ranges. Number ranges consist of a num-
ber, a dash ('-'), and a second number and select the fields or columns from the first number to the second, inclusive. Numbers or number
ranges may be preceded by a dash, which selects all fields or columns from 1 to the first number. Numbers or number ranges may be followed
by a dash, which selects all fields or columns from the last number to the end of the line. Numbers and number ranges may be repeated, over-
lapping, and in any order. It is not an error to select fields or columns not present in the input line.
The options are as follows:
-b list
The list specifies byte positions.
-c list
The list specifies character positions.
-d delim
Use the first character of delim as the field delimiter character instead of the tab character.
-f list
The list specifies fields, delimited in the input by a single tab character. Output fields are separated by a single tab character.
-n Do not split multi-byte characters.
-s Suppress lines with no field delimiter characters. Unless specified, lines with no delimiters are passed through unmodified.
ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of cut if the -n option is specified. Their effect is described in
environ(7).
EXAMPLES
Extract users' login names and shells from the system passwd(5) file as ``name:shell'' pairs:
cut -d : -f 1,7 /etc/passwd
Show the names and login times of the currently logged in users:
who | cut -c 1-16,26-38
DIAGNOSTICS
The cut utility exits 0 on success, and >0 if an error occurs.
SEE ALSO paste(1)STANDARDS
The cut utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').
HISTORY
A cut command appeared in AT&T System III UNIX.
BUGS
The -c option is a synonym for the -b option, which causes incorrect behaviour in locales that support multibyte characters.
When operating on fields (-f option is specified), cut does not recognise multibyte characters, and the delim character is recognised in the
middle of multibyte sequences.
BSD June 6, 1993 BSD