9 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
How can I use bash to remove the first line of a file? (3 Replies)
Discussion started by: locoroco
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2. Shell Programming and Scripting
I have a file output.txt. File looks like this
name1 10
name2 2
name3 5
I get a number n and I need to remove all lines which has number (after name) smaller or equal to n number.
After that I need to write lines from file and my output must be like this:
Output: 'name1 10'
Output: 'name2... (1 Reply)
Discussion started by: kubo12312
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3. Shell Programming and Scripting
Dear All,
assume i have a file with content:
<Start>6000</Start>
<Stop>7599</Stop>
the output is:
6000
7000
7100
7200
7300
7400
7599
how should we use any awk, sed, perl can do this task, means to extract the uniq prefixes from the start and stop prefix.
Thanks
Jimmy (3 Replies)
Discussion started by: jimmy_y
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4. Shell Programming and Scripting
Hello ,
I have file with below content :
'165567885',
'165568443',
'165568805',
I need an awk script that would add a prefix zero after first ' .
Like
'0165567885',
'0165568443',
'0165568805',
Please help.
Thanks in advance. (5 Replies)
Discussion started by: rmv
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5. Shell Programming and Scripting
Remove prefix using awk
File:
nawk -F"|" '{if ($1 ~ /^xyz./) print; else { gsub(.*\..*, \..*, $1) ;print }}' file
Error:
ouput required: (5 Replies)
Discussion started by: pinnacle
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6. Shell Programming and Scripting
Hi,
I need some help in removing the header (first line) and the trailer (last line) in a give file...
The data file actually comes in EBCDIC format and I converted it into ASCII..
Now I need to strip off the first line and the last line..
I think we can use sed to do something like this:... (2 Replies)
Discussion started by: madhunk
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7. Shell Programming and Scripting
I need to remove every second and every third line from a file. My idea was to do it in two operations. First every third line, then every second line. The problem is that i can't find out how to do it. I tried to look for some sed oneliners, but couldn't find any.
Suggestions? (4 Replies)
Discussion started by: bistru
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8. Shell Programming and Scripting
I'm trying to put together a shell script that will append specific prefixes based on the content of filenames. I think I have this part down. However, I want to append before that part a process that will remove the current prefix before it renames the files with the new prefix.
For example,... (6 Replies)
Discussion started by: HLee1981
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9. UNIX for Dummies Questions & Answers
I've got a bunch of files called oldabc, olddef etc.
i want to copy these to be abc, def....
I can do this with file extensions....but can get the logic to work for prefixes. All the files I am interested in have a prefix of 'old'.
This loop is no good for me....it looks at the content... (2 Replies)
Discussion started by: peter.herlihy
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SPLIT(1) BSD General Commands Manual SPLIT(1)
NAME
split -- split a file into pieces
SYNOPSIS
split [-a suffix_length] [-b byte_count[k|m]] [-l line_count] [-p pattern] [file [name]]
DESCRIPTION
The split utility reads the given file and breaks it up into files of 1000 lines each. If file is a single dash ('-') or absent, split reads
from the standard input.
The options are as follows:
-a Use suffix_length letters to form the suffix of the file name.
-b Create smaller files byte_count bytes in length. If ``k'' is appended to the number, the file is split into byte_count kilobyte
pieces. If ``m'' is appended to the number, the file is split into byte_count megabyte pieces.
-l Create smaller files n lines in length.
-p pattern
The file is split whenever an input line matches pattern, which is interpreted as an extended regular expression. The matching line
will be the first line of the next output file. This option is incompatible with the -b and -l options.
If additional arguments are specified, the first is used as the name of the input file which is to be split. If a second additional argument
is specified, it is used as a prefix for the names of the files into which the file is split. In this case, each file into which the file is
split is named by the prefix followed by a lexically ordered suffix using suffix_length characters in the range ``a-z''. If -a is not speci-
fied, two letters are used as the suffix.
If the name argument is not specified, the file is split into lexically ordered files named with prefixes in the range of ``x-z'' and with
suffixes as above.
SEE ALSO
csplit(1), re_format(7)
STANDARDS
The split utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').
HISTORY
A split command appeared in Version 3 AT&T UNIX.
BUGS
For historical reasons, if you specify name, split can only create 676 separate files. The default naming convention allows 2028 separate
files. The -a option can be used to work around this limitation.
The maximum line length for matching patterns is 65536.
BSD
April 16, 1994 BSD