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Is there a way to count the number of lines of text in a file including non-delimited ones?

How to add a newline to the end of a file?The simplest method to count lines matching specific patterns, including '0' if line is not found?Count lines of non-terminating inputHow to put a newline special character into a file using the echo command and redirection operator?How to efficiently split up a large text file wihout splitting multiline records?Why does wc get wrong result with output from psCounting files, directories, etc. in given directory and formatting output on screenBetter shell solution when blank lines may be piped to wcsearching letters in one line using grep and wcWhy is my multi-line perl string replace adding a blank line?

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}

4

The POSIX wc command counts how many POSIX lines in a file. The POSIX standard defines a line as a text string with the suffix n. Without n, a pure text string can't be called a line.

But to me, it's more natural to count how many lines of text string in a file. Is there an easy way to do that?

root:[~]# printf "aanbb" | wc -l

1

root:[~]# printf "aanbbn" | wc -l

2

root:[~]#

newlines wc line

share|improve this question

edited 14 hours ago

Stéphane Chazelas

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asked 15 hours ago

Just a learnerJust a learner

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• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Related: How to add a newline to the end of a file? (when the file doesn’t already have one).
  
  – Stephen Kitt
  13 hours ago
  

  
  
  
  

add a comment | 

4

The POSIX wc command counts how many POSIX lines in a file. The POSIX standard defines a line as a text string with the suffix n. Without n, a pure text string can't be called a line.

But to me, it's more natural to count how many lines of text string in a file. Is there an easy way to do that?

root:[~]# printf "aanbb" | wc -l

1

root:[~]# printf "aanbbn" | wc -l

2

root:[~]#

newlines wc line

share|improve this question

edited 14 hours ago

Stéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

asked 15 hours ago

Just a learnerJust a learner

64811 gold badge66 silver badges1717 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Related: How to add a newline to the end of a file? (when the file doesn’t already have one).
  
  – Stephen Kitt
  13 hours ago
  

  
  
  
  

add a comment | 

The POSIX wc command counts how many POSIX lines in a file. The POSIX standard defines a line as a text string with the suffix n. Without n, a pure text string can't be called a line.

But to me, it's more natural to count how many lines of text string in a file. Is there an easy way to do that?

root:[~]# printf "aanbb" | wc -l

1

root:[~]# printf "aanbbn" | wc -l

2

root:[~]#

newlines wc line

share|improve this question

edited 14 hours ago

Stéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

asked 15 hours ago

Just a learnerJust a learner

64811 gold badge66 silver badges1717 bronze badges

root:[~]# printf "aanbb" | wc -l

1

root:[~]# printf "aanbbn" | wc -l

2

root:[~]#

share|improve this question

edited 14 hours ago

Stéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

asked 15 hours ago

Just a learnerJust a learner

64811 gold badge66 silver badges1717 bronze badges

share|improve this question

edited 14 hours ago

Stéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

asked 15 hours ago

Just a learnerJust a learner

64811 gold badge66 silver badges1717 bronze badges

edited 14 hours ago

Stéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

edited 14 hours ago

Stéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

asked 15 hours ago

Just a learnerJust a learner

64811 gold badge66 silver badges1717 bronze badges

asked 15 hours ago

Just a learnerJust a learner

64811 gold badge66 silver badges1717 bronze badges

2 Answers
2

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oldest

votes

7

With GNU sed, you can use:

sed '$=;d'

As GNU sed does consider those extra characters after the last newline as an extra line. GNU sed like most GNU utilities also supports NUL characters in its input and doesn't have a limitation on the length of lines (the two other criteria that make an input non-text as per POSIX).

POSIXLy, building-up on @Inian's answer to support too-long lines and NUL bytes:

LC_ALL=C tr -cs 'n' '[x*]' | awk 'END {print NR}'

That tr command translates all sequences of one or more character (each byte interpreted as a character in the C locale to avoid decoding issues) other than newline to one x character, so awk input records will be either 0 or 1 byte long and its input contain only x and newline characters.

$ printf '%10000snabncnd' | wc -l

3



$ printf '%10000snabncnd' | mawk 'END{print NR}'

2

$ printf '%10000snabncnd' | busybox awk 'END{print NR}'

5

$ printf '%10000snabncnd' | gawk 'END{print NR}'

4



$ printf '%10000snabncnd' | LC_ALL=C tr -cs 'n' '[x*]' | mawk 'END{print NR}'

4

share|improve this answer

edited 14 hours ago

answered 14 hours ago

Stéphane ChazelasStéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

add a comment | 

4

You can use awk for this which has a special variable NR which tracks the number of current record from the start of the file. The variable gets incremented at the end of each line. When printed at the END block i.e. after all the input lines are processed it prints the number of the last record processed.

printf "aanbb" | awk 'END { print NR }'

2



printf "aanbbn" | awk 'END { print NR }'

2

share|improve this answer

answered 15 hours ago

InianInian

7,0301717 silver badges3434 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Note that with some awk implementations, that still implies the input doesn't contain NUL characters (which would also make that input non-text as per POSIX).
  
  – Stéphane Chazelas
  14 hours ago
  

  
  
  
  

add a comment | 

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7

With GNU sed, you can use:

sed '$=;d'

As GNU sed does consider those extra characters after the last newline as an extra line. GNU sed like most GNU utilities also supports NUL characters in its input and doesn't have a limitation on the length of lines (the two other criteria that make an input non-text as per POSIX).

POSIXLy, building-up on @Inian's answer to support too-long lines and NUL bytes:

LC_ALL=C tr -cs 'n' '[x*]' | awk 'END {print NR}'

That tr command translates all sequences of one or more character (each byte interpreted as a character in the C locale to avoid decoding issues) other than newline to one x character, so awk input records will be either 0 or 1 byte long and its input contain only x and newline characters.

$ printf '%10000snabncnd' | wc -l

3



$ printf '%10000snabncnd' | mawk 'END{print NR}'

2

$ printf '%10000snabncnd' | busybox awk 'END{print NR}'

5

$ printf '%10000snabncnd' | gawk 'END{print NR}'

4



$ printf '%10000snabncnd' | LC_ALL=C tr -cs 'n' '[x*]' | mawk 'END{print NR}'

4

share|improve this answer

edited 14 hours ago

answered 14 hours ago

Stéphane ChazelasStéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

add a comment | 

7

With GNU sed, you can use:

sed '$=;d'

As GNU sed does consider those extra characters after the last newline as an extra line. GNU sed like most GNU utilities also supports NUL characters in its input and doesn't have a limitation on the length of lines (the two other criteria that make an input non-text as per POSIX).

POSIXLy, building-up on @Inian's answer to support too-long lines and NUL bytes:

LC_ALL=C tr -cs 'n' '[x*]' | awk 'END {print NR}'

That tr command translates all sequences of one or more character (each byte interpreted as a character in the C locale to avoid decoding issues) other than newline to one x character, so awk input records will be either 0 or 1 byte long and its input contain only x and newline characters.

$ printf '%10000snabncnd' | wc -l

3



$ printf '%10000snabncnd' | mawk 'END{print NR}'

2

$ printf '%10000snabncnd' | busybox awk 'END{print NR}'

5

$ printf '%10000snabncnd' | gawk 'END{print NR}'

4



$ printf '%10000snabncnd' | LC_ALL=C tr -cs 'n' '[x*]' | mawk 'END{print NR}'

4

share|improve this answer

edited 14 hours ago

answered 14 hours ago

Stéphane ChazelasStéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

add a comment | 

With GNU sed, you can use:

sed '$=;d'

As GNU sed does consider those extra characters after the last newline as an extra line. GNU sed like most GNU utilities also supports NUL characters in its input and doesn't have a limitation on the length of lines (the two other criteria that make an input non-text as per POSIX).

POSIXLy, building-up on @Inian's answer to support too-long lines and NUL bytes:

LC_ALL=C tr -cs 'n' '[x*]' | awk 'END {print NR}'

That tr command translates all sequences of one or more character (each byte interpreted as a character in the C locale to avoid decoding issues) other than newline to one x character, so awk input records will be either 0 or 1 byte long and its input contain only x and newline characters.

$ printf '%10000snabncnd' | wc -l

3



$ printf '%10000snabncnd' | mawk 'END{print NR}'

2

$ printf '%10000snabncnd' | busybox awk 'END{print NR}'

5

$ printf '%10000snabncnd' | gawk 'END{print NR}'

4



$ printf '%10000snabncnd' | LC_ALL=C tr -cs 'n' '[x*]' | mawk 'END{print NR}'

4

share|improve this answer

edited 14 hours ago

answered 14 hours ago

Stéphane ChazelasStéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

sed '$=;d'

LC_ALL=C tr -cs 'n' '[x*]' | awk 'END {print NR}'

$ printf '%10000snabncnd' | wc -l

3



$ printf '%10000snabncnd' | mawk 'END{print NR}'

2

$ printf '%10000snabncnd' | busybox awk 'END{print NR}'

5

$ printf '%10000snabncnd' | gawk 'END{print NR}'

4



$ printf '%10000snabncnd' | LC_ALL=C tr -cs 'n' '[x*]' | mawk 'END{print NR}'

4

share|improve this answer

edited 14 hours ago

answered 14 hours ago

Stéphane ChazelasStéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

answered 14 hours ago

Stéphane ChazelasStéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

answered 14 hours ago

Stéphane ChazelasStéphane Chazelas

329k5757 gold badges641641 silver badges10081008 bronze badges

4

You can use awk for this which has a special variable NR which tracks the number of current record from the start of the file. The variable gets incremented at the end of each line. When printed at the END block i.e. after all the input lines are processed it prints the number of the last record processed.

printf "aanbb" | awk 'END { print NR }'

2



printf "aanbbn" | awk 'END { print NR }'

2

share|improve this answer

answered 15 hours ago

InianInian

7,0301717 silver badges3434 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Note that with some awk implementations, that still implies the input doesn't contain NUL characters (which would also make that input non-text as per POSIX).
  
  – Stéphane Chazelas
  14 hours ago
  

  
  
  
  

add a comment | 

4

You can use awk for this which has a special variable NR which tracks the number of current record from the start of the file. The variable gets incremented at the end of each line. When printed at the END block i.e. after all the input lines are processed it prints the number of the last record processed.

printf "aanbb" | awk 'END { print NR }'

2



printf "aanbbn" | awk 'END { print NR }'

2

share|improve this answer

answered 15 hours ago

InianInian

7,0301717 silver badges3434 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Note that with some awk implementations, that still implies the input doesn't contain NUL characters (which would also make that input non-text as per POSIX).
  
  – Stéphane Chazelas
  14 hours ago
  

  
  
  
  

add a comment | 

You can use awk for this which has a special variable NR which tracks the number of current record from the start of the file. The variable gets incremented at the end of each line. When printed at the END block i.e. after all the input lines are processed it prints the number of the last record processed.

printf "aanbb" | awk 'END { print NR }'

2



printf "aanbbn" | awk 'END { print NR }'

2

share|improve this answer

answered 15 hours ago

InianInian

7,0301717 silver badges3434 bronze badges

printf "aanbb" | awk 'END { print NR }'

2



printf "aanbbn" | awk 'END { print NR }'

2

share|improve this answer

answered 15 hours ago

InianInian

7,0301717 silver badges3434 bronze badges

answered 15 hours ago

InianInian

7,0301717 silver badges3434 bronze badges

answered 15 hours ago

InianInian

7,0301717 silver badges3434 bronze badges