Date: Tue, 01 Sep 2009 20:59:56 -0400 From: Steve Bertrand <steve@ibctech.ca> To: Warren Block <wblock@wonkity.com> Cc: George Davidovich <freebsd@optimis.net>, freebsd-questions@freebsd.org Subject: Re: remove newlines from a file Message-ID: <4A9DC38C.5090002@ibctech.ca> In-Reply-To: <alpine.BSF.2.00.0909011818190.7738@wonkity.com> References: <F2B402210EF1C4F7331B41C2@utd65257.utdallas.edu> <20090901205201.GA6126@marvin.optimis.net> <4A9DA1AB.8020102@ibctech.ca> <alpine.BSF.2.00.0909011818190.7738@wonkity.com>
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This is a cryptographically signed message in MIME format. --------------ms010200090309070905040503 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Warren Block wrote: > On Tue, 1 Sep 2009, Steve Bertrand wrote: >> George Davidovich wrote: >>> On Tue, Sep 01, 2009 at 06:03:19PM +0000, Paul Schmehl wrote: >>>> I found a sed tutorial once that did this, but I can't seem to find it >>>> again. >>> >>> You're probably thinking of "Useful One-Line Scripts for Sed": >>> >>> http://sed.sourceforge.net/sed1line.txt >>> >>> A good follow-up: >>> >>> http://www.osnews.com/story/21004/Awk_and_Sed_One-Liners_Explained >>> >>>> I have a file with multiple lines, each of which contains a single ip >>>> followed by a /32 and a comma. I want to combine all those lines into >>>> a single line by removing all the newline characters at the end of >>>> each line. >>>> >>>> What's the best/most efficient way of doing that in a shell? >>> >>> A sed solution would be >>> >>> sed -e :a -e '$!N; s/\n/ /; ta' my_file >>> >>> Other (easier to remember) solutions could include: >>> >>> tr -d '\n' < my_file >>> tr '\n' ' ' < my_file >>> >>> echo $(cat my_file) # not so useless use of cat! >>> >>> paste -s my_file >>> >>> while read line; do >>> joined="$joined $(echo $line)" >>> done < my_file >>> echo $joined >>> >>> Lots of options, of course. Even more with Perl. >> >> Yeah, how 'bout Perl: >> >> % perl -ne 's/\n/ /g; print;' < tests/ips.txt > > perl -pe 'chomp' myfile > > is somewhat easier. Niiiice golf... > Works with Ruby, too. Is Ruby Perl? ;) Steve --------------ms010200090309070905040503 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIII/zCC AtowggJDoAMCAQICEEs5xg/J3t77QWJ4SatV1HcwDQYJKoZIhvcNAQEFBQAwYjELMAkGA1UE BhMCWkExJTAjBgNVBAoTHFRoYXd0ZSBDb25zdWx0aW5nIChQdHkpIEx0ZC4xLDAqBgNVBAMT I1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFpbCBJc3N1aW5nIENBMB4XDTA5MDUwNzIzMTYxMFoX DTEwMDUwNzIzMTYxMFowQjEfMB0GA1UEAxMWVGhhd3RlIEZyZWVtYWlsIE1lbWJlcjEfMB0G CSqGSIb3DQEJARYQc3RldmVAaWJjdGVjaC5jYTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCC AQoCggEBAJSTRAjP1RVa87/mnZn+PBTbENgyhhBJ4rWApmaNcthzRdk2DB/49KrXx3EQP60w Lj4KU0DFkiGNVj9BnVxRAx/WDXKxGC3uGGEG6gjyWv8KFMWMsH9mL7y7uNow1HueT6pZUf9o yY8Ewd+01QpGi7FfXOae7lGHhbEwnEJGwz08ytRfLmH0KtEzlZanZZhwDGX5s1kIHnyxdACh 3byXY6Z2bOrx0rcrQHCnHJppxddR60F7igjaMuBFstE51h9XTgXDNKJbglqTug5ghGihNuP6 VsBN7ue62y96UGIE22TvKEcAQ665vQGjHqZeSzZYy+hWNOa27pWFmhlqFjx0x8MCAwEAAaMt MCswGwYDVR0RBBQwEoEQc3RldmVAaWJjdGVjaC5jYTAMBgNVHRMBAf8EAjAAMA0GCSqGSIb3 DQEBBQUAA4GBAMOmjxjp2Xzk6ZHLwTgFDzVhm98RjRT3UXotKjNIR7SgwfWF5wkJrx4I+dXu ui5ztMEq4bTTRgJ344MqE6uZiZlg+tBIFHZGCJfKdzsX4QuV2jmw0sR5dMaYxG6tlDB0YUMv gTqzV7ZDpiusTMOZe9pP1PdxFhOcIJXtMQDj5LhuMIIC2jCCAkOgAwIBAgIQSznGD8ne3vtB YnhJq1XUdzANBgkqhkiG9w0BAQUFADBiMQswCQYDVQQGEwJaQTElMCMGA1UEChMcVGhhd3Rl IENvbnN1bHRpbmcgKFB0eSkgTHRkLjEsMCoGA1UEAxMjVGhhd3RlIFBlcnNvbmFsIEZyZWVt YWlsIElzc3VpbmcgQ0EwHhcNMDkwNTA3MjMxNjEwWhcNMTAwNTA3MjMxNjEwWjBCMR8wHQYD VQQDExZUaGF3dGUgRnJlZW1haWwgTWVtYmVyMR8wHQYJKoZIhvcNAQkBFhBzdGV2ZUBpYmN0 ZWNoLmNhMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlJNECM/VFVrzv+admf48 FNsQ2DKGEEnitYCmZo1y2HNF2TYMH/j0qtfHcRA/rTAuPgpTQMWSIY1WP0GdXFEDH9YNcrEY Le4YYQbqCPJa/woUxYywf2YvvLu42jDUe55PqllR/2jJjwTB37TVCkaLsV9c5p7uUYeFsTCc QkbDPTzK1F8uYfQq0TOVlqdlmHAMZfmzWQgefLF0AKHdvJdjpnZs6vHStytAcKccmmnF11Hr QXuKCNoy4EWy0TnWH1dOBcM0oluCWpO6DmCEaKE24/pWwE3u57rbL3pQYgTbZO8oRwBDrrm9 AaMepl5LNljL6FY05rbulYWaGWoWPHTHwwIDAQABoy0wKzAbBgNVHREEFDASgRBzdGV2ZUBp YmN0ZWNoLmNhMAwGA1UdEwEB/wQCMAAwDQYJKoZIhvcNAQEFBQADgYEAw6aPGOnZfOTpkcvB OAUPNWGb3xGNFPdRei0qM0hHtKDB9YXnCQmvHgj51e66LnO0wSrhtNNGAnfjgyoTq5mJmWD6 0EgUdkYIl8p3OxfhC5XaObDSxHl0xpjEbq2UMHRhQy+BOrNXtkOmK6xMw5l72k/U93EWE5wg le0xAOPkuG4wggM/MIICqKADAgECAgENMA0GCSqGSIb3DQEBBQUAMIHRMQswCQYDVQQGEwJa QTEVMBMGA1UECBMMV2VzdGVybiBDYXBlMRIwEAYDVQQHEwlDYXBlIFRvd24xGjAYBgNVBAoT EVRoYXd0ZSBDb25zdWx0aW5nMSgwJgYDVQQLEx9DZXJ0aWZpY2F0aW9uIFNlcnZpY2VzIERp dmlzaW9uMSQwIgYDVQQDExtUaGF3dGUgUGVyc29uYWwgRnJlZW1haWwgQ0ExKzApBgkqhkiG 9w0BCQEWHHBlcnNvbmFsLWZyZWVtYWlsQHRoYXd0ZS5jb20wHhcNMDMwNzE3MDAwMDAwWhcN MTMwNzE2MjM1OTU5WjBiMQswCQYDVQQGEwJaQTElMCMGA1UEChMcVGhhd3RlIENvbnN1bHRp bmcgKFB0eSkgTHRkLjEsMCoGA1UEAxMjVGhhd3RlIFBlcnNvbmFsIEZyZWVtYWlsIElzc3Vp bmcgQ0EwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAMSmPFVzVftOucqZWh5owHUEcJ3f 6f+jHuy9zfVb8hp2vX8MOmHyv1HOAdTlUAow1wJjWiyJFXCO3cnwK4Vaqj9xVsuvPAsH5/Ef kTYkKhPPK9Xzgnc9A74r/rsYPge/QIACZNenprufZdHFKlSFD0gEf6e20TxhBEAeZBlyYLf7 AgMBAAGjgZQwgZEwEgYDVR0TAQH/BAgwBgEB/wIBADBDBgNVHR8EPDA6MDigNqA0hjJodHRw Oi8vY3JsLnRoYXd0ZS5jb20vVGhhd3RlUGVyc29uYWxGcmVlbWFpbENBLmNybDALBgNVHQ8E BAMCAQYwKQYDVR0RBCIwIKQeMBwxGjAYBgNVBAMTEVByaXZhdGVMYWJlbDItMTM4MA0GCSqG SIb3DQEBBQUAA4GBAEiM0VCD6gsuzA2jZqxnD3+vrL7CF6FDlpSdf0whuPg2H6otnzYvwPQc UCCTcDz9reFhYsPZOhl+hLGZGwDFGguCdJ4lUJRix9sncVcljd2pnDmOjCBPZV+V2vf3h9bG CE6u9uo05RAaWzVNd+NWIXiC3CEZNd4ksdMdRv9dX2VPMYIDZDCCA2ACAQEwdjBiMQswCQYD VQQGEwJaQTElMCMGA1UEChMcVGhhd3RlIENvbnN1bHRpbmcgKFB0eSkgTHRkLjEsMCoGA1UE AxMjVGhhd3RlIFBlcnNvbmFsIEZyZWVtYWlsIElzc3VpbmcgQ0ECEEs5xg/J3t77QWJ4SatV 1HcwCQYFKw4DAhoFAKCCAcMwGAYJKoZIhvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0B CQUxDxcNMDkwOTAyMDA1OTU2WjAjBgkqhkiG9w0BCQQxFgQUGwfwJ179VgWn+Bx1lWtPq553 i2MwUgYJKoZIhvcNAQkPMUUwQzAKBggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZI hvcNAwICAUAwBwYFKw4DAgcwDQYIKoZIhvcNAwICASgwgYUGCSsGAQQBgjcQBDF4MHYwYjEL MAkGA1UEBhMCWkExJTAjBgNVBAoTHFRoYXd0ZSBDb25zdWx0aW5nIChQdHkpIEx0ZC4xLDAq BgNVBAMTI1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFpbCBJc3N1aW5nIENBAhBLOcYPyd7e+0Fi eEmrVdR3MIGHBgsqhkiG9w0BCRACCzF4oHYwYjELMAkGA1UEBhMCWkExJTAjBgNVBAoTHFRo YXd0ZSBDb25zdWx0aW5nIChQdHkpIEx0ZC4xLDAqBgNVBAMTI1RoYXd0ZSBQZXJzb25hbCBG cmVlbWFpbCBJc3N1aW5nIENBAhBLOcYPyd7e+0FieEmrVdR3MA0GCSqGSIb3DQEBAQUABIIB AEYuyvUNUy2WFL/K5f6YYKhAg+Q0xyPXabknF1/OGVXpl5dtFXTJz2iqC+jBCI6/ZTbTyK/Q K1q0nFHaigmwhdczYMdYpAEXq/TTqcLtt8WzIOOOdd1VjzE2CQbRlZYLTdzjmuM5Psi9d5Yo +tO40XdJd3k1PQj3Uhiql3999kccoYvx2HqYjVyhgy3KAOI1TEz8+M3FqArF3YGM1N00y+5T pSWTUdCvPKc322tYcyqlYxaryuunb4J/eqO6zRdzIT/gUY/Vz2MvrbKQMh1zNIQu8xH7loTh J2rn0sx+zSZgbc/GXFrEYdT3VbAiIcgeCH768URIsRF1wbpcu9w5/KAAAAAAAAA= --------------ms010200090309070905040503--
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