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1. Shell Programming and Scripting
Need to replace last field in a file(/etc/passwd) ,if first filed matches with particular username.
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2. UNIX for Dummies Questions & Answers
I would like the output to be:
How can I achieve this?
So far what I though of is: (1 Reply)
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3. Shell Programming and Scripting
I have a text file in the below format:
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I am trying to gather information from the second file and append it to the first file.
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6. Shell Programming and Scripting
I have 2 files . one is source.txt and second one is target.txt. I want to keep source.txt as baseline and compare target.txt. please find the data in 2 files and Expected output.
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7. Shell Programming and Scripting
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8. Shell Programming and Scripting
I've internally searched through forums for about 2+ hours. Unfortunately, with no luck. Although I've found some cases close to mine below, but didn't help so much.
Actually, I'm in short with time. So I had to post my case. Hoping that you can help.
I have 2 files,
... (1 Reply)
Discussion started by: amurib
9. Shell Programming and Scripting
can anyone tell me please ......how to append a new field at the end of a file with the help of sed or some other command in bourne shell (8 Replies)
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10. Shell Programming and Scripting
I want to sort alphabetically on the first field and sort in descending numerical order on the 2nd field. With a normal "sort -r -n" it does this:
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Discussion started by: FrancoisCN
keyhead(1) General Commands Manual keyhead(1)
keyhead - Change FITS or IRAF header keyword names
keyhead [-hknv] <FITS or IRAF file> kw1=kw1a kw2=kwd2a ... kwn=kwdna
Change the names of keywords in FITS or IRAF image headers. Each current image keyword whose entry is to be modified should be followed by
an equal sign and a second keyword, with no intervening spaces. If the -r option is used, the value of the second keyword is transfered to
that of the first. Otherwise, the name of the first keyword is changed to the second keyword. To change keywords in a list of files, sub-
stitute @<listfile> for the file names on the command line. To change a lot of keywords, put them, one pair separated by an = sign with no
spaces per line, in a file and substitute @<keylistfile> on the command line. If two @ commands are present, the program will figure out
which contains file names and which contains keywords. Lines in a keyword list file which do not contain an = are ignored.
-h Write HISTORY line into output header with sethead version, current date and time, and names of keywords set.
-k Write KEYHEAD keyword into output header with the keyhead version, current date and time, and names of keywords whose names are
changed. If a KEYHEAD keyword already exists, move the old value to a HISTORY line before writing the new value
-n Write a new file with an added "e" before the extension.
Replace value of 1st keyword with value of 2nd keyword instead of changing the name of the 1st keyword to the 2nd keyword. The 2nd
keyword remains in the header. If the 1st keyword does not exist in the header, it is created.
-v Print confirmations of each keyword change.
Doug Mink, SAO (firstname.lastname@example.org)
6 July 2001 WCSTools keyhead(1)