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Shell Programming and Scripting
Replace a character of specified column(s) of all rows in a file
Post 302879755 by Yoda on Sunday 15th of December 2013 01:08:09 AM
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Can someone help me to write a script / command to read in a file, character by character, replace any unknown ASCII characters with space. then write out the file to a new filename/
Thanks! (1 Reply)
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Match column 3 in file1 to column 1 in file 2 and replace with column 2 from file2
file 1 sample
SNDK 80004C101 AT
XLNX 983919101 BB
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AMD 007903107 CC
KLAC 482480100 DC
TER 880770102 KATS
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I have a file that contains several thousands rows. Here is an example.
^411912$
^487267$
^643776$
^682249$
^687737$
^692328$
^693767$
^695483$
^697289$
^757411$
^776688$
^778953$
^806123$
^872262$
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file02= 7 columns, row unknown (but many)
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e.g.
file 01
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I have a data with 4 columns separete with tab delimiter as following:
A B {123} E{456}
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My expected result as following: (become 5 columns)
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This is a file that I have
test line 1 (55)
)
test line 2 (45)
)
I would like to change all the parens in position 1 of this file to a );
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Hello to all,
I have the following text where columns are separated by spaces. I want to have the 3rd column separating
3 strings with 2 "_" in the format below:
LeftSring_CentralString_RightString
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Row1,1,2,3,......,n
row2,4,5,6,.......,n
.
.
.
.
rown,7,8,9,........,n
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TER
ENDMDL
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LEARN ABOUT FREEBSD
colrm
COLRM(1) BSD General Commands Manual COLRM(1) NAME
colrm -- remove columns from a file SYNOPSIS
colrm [start [stop]] DESCRIPTION
The colrm utility removes selected columns from the lines of a file. A column is defined as a single character in a line. Input is read from the standard input. Output is written to the standard output. If only the start column is specified, columns numbered less than the start column will be written. If both start and stop columns are spec- ified, columns numbered less than the start column or greater than the stop column will be written. Column numbering starts with one, not zero. Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one. ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7). EXIT STATUS
The colrm utility exits 0 on success, and >0 if an error occurs. SEE ALSO
awk(1), column(1), cut(1), paste(1) HISTORY
The colrm command appeared in 3.0BSD. BSD
August 4, 2004 BSD