Escape a mm/dd/YY backup date in a file name Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern) 2019 Community Moderator Election Results Why I closed the “Why is Kali so hard” questionthe slash (/) after a directory name on shell commandsDate time in Linux bashCreate sub-directories and organize files by date from file nameWhat is the difference between a directory name that ends with a slash and one that does not?How do you put date and time in a file name?adding date to beginning of file name using scripttcsh - echo escape code for escapeConvert date in bash shellHow to adjust the Exif timestamp of a photo using the date in its nameshell script to walk folders and sub-folders, convert timestamp to UTC format and export .csv file

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Escape a mm/dd/YY backup date in a file name



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)
2019 Community Moderator Election Results
Why I closed the “Why is Kali so hard” questionthe slash (/) after a directory name on shell commandsDate time in Linux bashCreate sub-directories and organize files by date from file nameWhat is the difference between a directory name that ends with a slash and one that does not?How do you put date and time in a file name?adding date to beginning of file name using scripttcsh - echo escape code for escapeConvert date in bash shellHow to adjust the Exif timestamp of a photo using the date in its nameshell script to walk folders and sub-folders, convert timestamp to UTC format and export .csv file



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6















I have been trying to:



cp file.csv file.$(date +%D).csv


But it fails because the filenames is: file.03/27/19.csv with the slash of separate directories.



And I have been trying again to:



cp file.csv file.$(printf "%q" $(date +%D)).csv


But it still fails.






shell filenames date escape-characters slash







share|improve this question
























  • You can not set a filename with slash characters: stackoverflow.com/questions/9847288/…

    – tres.14159
    Mar 27 at 17:31











  • the problem is your use of the date format using the / character. You said it yourself, the shell is seeing them as directory markers. Try one of the many other options available from date. You might be able to get the / escaped so the filename uses the character code (like putting a space in a filename), but that is often problematic.

    – 0xSheepdog
    Mar 27 at 17:32


















6















I have been trying to:



cp file.csv file.$(date +%D).csv


But it fails because the filenames is: file.03/27/19.csv with the slash of separate directories.



And I have been trying again to:



cp file.csv file.$(printf "%q" $(date +%D)).csv


But it still fails.






shell filenames date escape-characters slash







share|improve this question
























  • You can not set a filename with slash characters: stackoverflow.com/questions/9847288/…

    – tres.14159
    Mar 27 at 17:31











  • the problem is your use of the date format using the / character. You said it yourself, the shell is seeing them as directory markers. Try one of the many other options available from date. You might be able to get the / escaped so the filename uses the character code (like putting a space in a filename), but that is often problematic.

    – 0xSheepdog
    Mar 27 at 17:32














6












6








6








I have been trying to:



cp file.csv file.$(date +%D).csv


But it fails because the filenames is: file.03/27/19.csv with the slash of separate directories.



And I have been trying again to:



cp file.csv file.$(printf "%q" $(date +%D)).csv


But it still fails.






shell filenames date escape-characters slash







share|improve this question
















I have been trying to:



cp file.csv file.$(date +%D).csv


But it fails because the filenames is: file.03/27/19.csv with the slash of separate directories.



And I have been trying again to:



cp file.csv file.$(printf "%q" $(date +%D)).csv


But it still fails.






shell filenames date escape-characters slash




shell filenames date escape-characters slash






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 28 at 9:27









Stéphane Chazelas

315k57597955




315k57597955










asked Mar 27 at 17:27









tres.14159tres.14159

4314




4314












  • You can not set a filename with slash characters: stackoverflow.com/questions/9847288/…

    – tres.14159
    Mar 27 at 17:31











  • the problem is your use of the date format using the / character. You said it yourself, the shell is seeing them as directory markers. Try one of the many other options available from date. You might be able to get the / escaped so the filename uses the character code (like putting a space in a filename), but that is often problematic.

    – 0xSheepdog
    Mar 27 at 17:32


















  • You can not set a filename with slash characters: stackoverflow.com/questions/9847288/…

    – tres.14159
    Mar 27 at 17:31











  • the problem is your use of the date format using the / character. You said it yourself, the shell is seeing them as directory markers. Try one of the many other options available from date. You might be able to get the / escaped so the filename uses the character code (like putting a space in a filename), but that is often problematic.

    – 0xSheepdog
    Mar 27 at 17:32

















You can not set a filename with slash characters: stackoverflow.com/questions/9847288/…

– tres.14159
Mar 27 at 17:31





You can not set a filename with slash characters: stackoverflow.com/questions/9847288/…

– tres.14159
Mar 27 at 17:31













the problem is your use of the date format using the / character. You said it yourself, the shell is seeing them as directory markers. Try one of the many other options available from date. You might be able to get the / escaped so the filename uses the character code (like putting a space in a filename), but that is often problematic.

– 0xSheepdog
Mar 27 at 17:32






the problem is your use of the date format using the / character. You said it yourself, the shell is seeing them as directory markers. Try one of the many other options available from date. You might be able to get the / escaped so the filename uses the character code (like putting a space in a filename), but that is often problematic.

– 0xSheepdog
Mar 27 at 17:32











1 Answer
1






active

oldest

votes


















19














You can't have / (byte 0x2F on ASCII-based systems) in a file name, period.



You can use characters that look like / like ∕ (U+2215 division slash) or ⁄ (U+2044 fraction slash though found in fewer of the charsets used in current locales), so you could do (provided that U+2215 character exists in the locale's charset, includes GBK, BIG5, UTF-8, GB18030):



cp file.csv "file.$(date +%D | sed 's|/|∕|g').csv"


Or with some shells (zsh, bash at least):



cp file.csv "file.$(date +%D | sed $'s|/|u2215|g').csv"


(here using sed instead of tr as some tr implementations including GNU tr still don't support multi-byte characters).



But you may run into problems like the file name being rendered differently in locales using a different charset from the one that was in use at the time you created the file (and of course the confusion of users when they see what looks like a slash in a file name).



My advice would be to use the standard non-ambiguous (for most people outside the US, 03/12/18 would be interpreted as the 3rd of December 2018 for instance) YYYY-mm-dd format instead (which also helps wrt sorting):



cp file.csv "file.$(date +%Y-%m-%d).csv"


Which with many date implementations you can shorten to:



cp file.csv "file.$(date +%F).csv"





share|improve this answer




















  • 2





    Other characters similar to slash can also be cumbersome to type in terminal.

    – gronostaj
    Mar 28 at 8:49











  • @gronostaj, I've added a method to specify the character based on its Unicode codepoint.

    – Stéphane Chazelas
    Mar 28 at 16:37











Your Answer








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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









19














You can't have / (byte 0x2F on ASCII-based systems) in a file name, period.



You can use characters that look like / like ∕ (U+2215 division slash) or ⁄ (U+2044 fraction slash though found in fewer of the charsets used in current locales), so you could do (provided that U+2215 character exists in the locale's charset, includes GBK, BIG5, UTF-8, GB18030):



cp file.csv "file.$(date +%D | sed 's|/|∕|g').csv"


Or with some shells (zsh, bash at least):



cp file.csv "file.$(date +%D | sed $'s|/|u2215|g').csv"


(here using sed instead of tr as some tr implementations including GNU tr still don't support multi-byte characters).



But you may run into problems like the file name being rendered differently in locales using a different charset from the one that was in use at the time you created the file (and of course the confusion of users when they see what looks like a slash in a file name).



My advice would be to use the standard non-ambiguous (for most people outside the US, 03/12/18 would be interpreted as the 3rd of December 2018 for instance) YYYY-mm-dd format instead (which also helps wrt sorting):



cp file.csv "file.$(date +%Y-%m-%d).csv"


Which with many date implementations you can shorten to:



cp file.csv "file.$(date +%F).csv"





share|improve this answer




















  • 2





    Other characters similar to slash can also be cumbersome to type in terminal.

    – gronostaj
    Mar 28 at 8:49











  • @gronostaj, I've added a method to specify the character based on its Unicode codepoint.

    – Stéphane Chazelas
    Mar 28 at 16:37















19














You can't have / (byte 0x2F on ASCII-based systems) in a file name, period.



You can use characters that look like / like ∕ (U+2215 division slash) or ⁄ (U+2044 fraction slash though found in fewer of the charsets used in current locales), so you could do (provided that U+2215 character exists in the locale's charset, includes GBK, BIG5, UTF-8, GB18030):



cp file.csv "file.$(date +%D | sed 's|/|∕|g').csv"


Or with some shells (zsh, bash at least):



cp file.csv "file.$(date +%D | sed $'s|/|u2215|g').csv"


(here using sed instead of tr as some tr implementations including GNU tr still don't support multi-byte characters).



But you may run into problems like the file name being rendered differently in locales using a different charset from the one that was in use at the time you created the file (and of course the confusion of users when they see what looks like a slash in a file name).



My advice would be to use the standard non-ambiguous (for most people outside the US, 03/12/18 would be interpreted as the 3rd of December 2018 for instance) YYYY-mm-dd format instead (which also helps wrt sorting):



cp file.csv "file.$(date +%Y-%m-%d).csv"


Which with many date implementations you can shorten to:



cp file.csv "file.$(date +%F).csv"





share|improve this answer




















  • 2





    Other characters similar to slash can also be cumbersome to type in terminal.

    – gronostaj
    Mar 28 at 8:49











  • @gronostaj, I've added a method to specify the character based on its Unicode codepoint.

    – Stéphane Chazelas
    Mar 28 at 16:37













19












19








19







You can't have / (byte 0x2F on ASCII-based systems) in a file name, period.



You can use characters that look like / like ∕ (U+2215 division slash) or ⁄ (U+2044 fraction slash though found in fewer of the charsets used in current locales), so you could do (provided that U+2215 character exists in the locale's charset, includes GBK, BIG5, UTF-8, GB18030):



cp file.csv "file.$(date +%D | sed 's|/|∕|g').csv"


Or with some shells (zsh, bash at least):



cp file.csv "file.$(date +%D | sed $'s|/|u2215|g').csv"


(here using sed instead of tr as some tr implementations including GNU tr still don't support multi-byte characters).



But you may run into problems like the file name being rendered differently in locales using a different charset from the one that was in use at the time you created the file (and of course the confusion of users when they see what looks like a slash in a file name).



My advice would be to use the standard non-ambiguous (for most people outside the US, 03/12/18 would be interpreted as the 3rd of December 2018 for instance) YYYY-mm-dd format instead (which also helps wrt sorting):



cp file.csv "file.$(date +%Y-%m-%d).csv"


Which with many date implementations you can shorten to:



cp file.csv "file.$(date +%F).csv"





share|improve this answer















You can't have / (byte 0x2F on ASCII-based systems) in a file name, period.



You can use characters that look like / like ∕ (U+2215 division slash) or ⁄ (U+2044 fraction slash though found in fewer of the charsets used in current locales), so you could do (provided that U+2215 character exists in the locale's charset, includes GBK, BIG5, UTF-8, GB18030):



cp file.csv "file.$(date +%D | sed 's|/|∕|g').csv"


Or with some shells (zsh, bash at least):



cp file.csv "file.$(date +%D | sed $'s|/|u2215|g').csv"


(here using sed instead of tr as some tr implementations including GNU tr still don't support multi-byte characters).



But you may run into problems like the file name being rendered differently in locales using a different charset from the one that was in use at the time you created the file (and of course the confusion of users when they see what looks like a slash in a file name).



My advice would be to use the standard non-ambiguous (for most people outside the US, 03/12/18 would be interpreted as the 3rd of December 2018 for instance) YYYY-mm-dd format instead (which also helps wrt sorting):



cp file.csv "file.$(date +%Y-%m-%d).csv"


Which with many date implementations you can shorten to:



cp file.csv "file.$(date +%F).csv"






share|improve this answer














share|improve this answer



share|improve this answer








edited Mar 28 at 16:52

























answered Mar 27 at 17:33









Stéphane ChazelasStéphane Chazelas

315k57597955




315k57597955







  • 2





    Other characters similar to slash can also be cumbersome to type in terminal.

    – gronostaj
    Mar 28 at 8:49











  • @gronostaj, I've added a method to specify the character based on its Unicode codepoint.

    – Stéphane Chazelas
    Mar 28 at 16:37












  • 2





    Other characters similar to slash can also be cumbersome to type in terminal.

    – gronostaj
    Mar 28 at 8:49











  • @gronostaj, I've added a method to specify the character based on its Unicode codepoint.

    – Stéphane Chazelas
    Mar 28 at 16:37







2




2





Other characters similar to slash can also be cumbersome to type in terminal.

– gronostaj
Mar 28 at 8:49





Other characters similar to slash can also be cumbersome to type in terminal.

– gronostaj
Mar 28 at 8:49













@gronostaj, I've added a method to specify the character based on its Unicode codepoint.

– Stéphane Chazelas
Mar 28 at 16:37





@gronostaj, I've added a method to specify the character based on its Unicode codepoint.

– Stéphane Chazelas
Mar 28 at 16:37

















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