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Old 10-22-2008, 12:46 PM   #1
mcgao07
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Question tail: cannot open `+5' for reading: No such file or directory


Hello,

I have a simple script that runs well on other linux but not on my new RHEL v5. It says:
"tail: cannot open `+5' for reading: No such file or directory"

The line causes the trouble is:
cat XYZ.poscar | tail +5 | awk '{printf("%4s%6s%4s\n",$5, $6, $4)}' > types_

I appreciate any help.

Michael
 
Old 10-22-2008, 12:54 PM   #2
forrestt
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What are you trying to do?

Forrest
 
Old 10-22-2008, 12:58 PM   #3
JD50
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It should be
Code:
 tail -5
not
Code:
 tail +5
 
Old 10-22-2008, 01:05 PM   #4
forrestt
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I'm guessing it should be:

Code:
tail -5 XYZ.poscar | awk '{printf("%4s%6s%4s\n",$5, $6, $4)}' > types_
But since I don't know what he's trying to do, I cant really say. Perhaps +5 is a valid option to tail on some flavour of Linux I've not used.

Forrest
 
Old 10-22-2008, 01:07 PM   #5
colucix
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The tail +N syntax is obsolete and it's not accepted on some systems. Instead, you have to use the option -n explictly:
Code:
tail -n +5
or eventually you can specify an older POSIX standard in your environment. You can do this by defining the environment variable _POSIX2_VERSION, for example by using the env command:
Code:
env _POSIX2_VERSION=199209 tail +5 XYZ.poscar | awk ...
this force to run the tail command conformed to POSIX 1003.2-1992.
 
Old 10-22-2008, 01:10 PM   #6
colucix
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Quote:
Originally Posted by forrestt View Post
Perhaps +5 is a valid option to tail on some flavour of Linux I've not used.
Yes. The +N option means "show the last lines of the file starting from the Nth line" instead of the default 10 lines.
 
Old 10-22-2008, 01:16 PM   #7
forrestt
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So, then it should be:

Code:
awk 'NR>4 {printf("%4s%6s%4s\n",$5, $6, $4)}' > types_
HTH

Forrest
 
Old 10-22-2008, 01:16 PM   #8
mcgao07
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Thank you all for such prompt replies. The option "tail -n +5" really works.

Michael
 
  


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