Alors pour un petit retour la première commande est effectivement inutile !
dans la seconde commande, tous les arguments du --post-data ne sont pas utiles, en revanche beaucoup le sont, simplement ceux qui avaientt une syntaxe du style argument=&arguments_suivant (autrement dit lorsqu'il y a un "=" et rien derrière) l'argument est "éliminable", par contre les autres sont nécessaires. C'est ok pour les argument $num et $pass je ne sais pas ce que j'avais fait... le script final est donc :
#!/bin/bash
site=https://espace-client.simplicime.com/Pages/Identification/Authentification.aspx/;
conso=https://espace-client.simplicime.com/Pages/FactureConsos/InfosConso.aspx/;
num="06XXXXXX";
pass="XXXXXX";
cookies=~/cron-cookies.txt;
wget --keep-session-cookies --save-cookies $cookies --load-cookies $cookies -O /dev/null \
--post-data="__VIEWSTATE=IyNbNEBwS7c6iYU7uLtx2BqovpsBX2iFi59xHBDP8O43cjkR2SaO%2BcArmd%2FVEfc7wheJ1efyJiOb6dnBIYW8RCpNlG0Asu6vGHjHdC8Xi%2BInOxRVhuxH6EMbHmyMbUlBtdFHrjJmzbVUZy21BVpK9%2FuYaY1f4iZvHUUZQs6HTj%2Bu8Z2DtjMP5ePu4zkFj2kQDFOLfI6oP1LV7JTt5LDBQ4j7mWqu1%2BXe7GTRYPaBwfoFBIEHlfwIKjWTOQ64sk9xcgFt59RG49hyDC3APgEpFZLI0gH4sRsENlZ5YYm9bmH4otEZE1g05syia0NfedwgS%2BRYiQwKT5y2q7kXA9kAqpRgEJxn0e86kiIuEh7PBsHtqCogaRC5vvH5alUd60RyMmvHNCO0Qo%2BhV4Pp9UuuWF%2BqgHS4KtZpRi5gBPl0L86PN85gxGDABbu3JY1b2YKZsAuRVvLm6M8QwTzxbdm5iE5AO%2BQ2tB0F%2FZ0gKOpAD%2BagTO%2Fca7lSEbP9I499WKA1eLzD89WMckfzx9Q6aBZhOOIi7m9CjxZdeSztwgbA1%2BWni25z69uyF7AXIR7IeiGaKKgAff%2BrHhDDC0AWaCLfOI0Q%2FZQ1I6XpmABNl5z4rgWVLbuQ%2FfAf2o0mnxN4HANTDBWID5964VFWXv3HpbO9P%2BSMz%2F6A2%2BEYTeTgRhaTnyua64vc8fqba2bjeSUMftexkw3liG2%2FKCzfd%2FZzp%2B5pvDxePSW5wQ1QbCquPxWwkOyTTG9GwcBPjsQhid8hQIi70%2F0XL2vXOqb8CCQxrRYCph8ujn5BORD8F8W6%2BhL50djm%2BVrwtBSXaxfRKXmqaFrnPYK43p41BKApLLdEWZ%2FOiFD%2BzYNBOxRQRPInmKbd9SpWYgh1A7f6IF6znhs7foWX4sbduUnMz%2Fn7MxlYQUNpzaIzHd4P0kVo93%2FHb6AFBRLBbIYXWJxfBnktNqIypj8pOPu43fVxcKafCcWCcYsAH1%2BOg8j0MUmAr4%2FPmTYAHnEdh03U6AJPgsWgALromPpN6DE6JTP8aNuTdOMs9eWiM5RGxLXguHZIcxtQZi0NjxZsFewlrWaxby26O8ayEYXEqqPq4e%2Fmk4j6t%2Fl34WkC3AP9MoIWU2oWEncvkh8HjEsCfz7U3z6SNWTYJ%2Fi9hHlTvKLmpFxxlh2NlDlGw%2BbwsulwqYwzCyBwOy3XXhSWx5g9%2BkIdmfFAVPwDgsfTlI%2Fi4oqrYXjKX03WivnN5mkqg3vo4QDYesf%2FBGKXI59W9qjoWp%2Ffmb3hVlEHWIeCRFBgj7G%2BfNpSE%2FgjzyCYh7OWUTcY3MKx%2Bffzcj6DSyjX%2B8ukY6mCQk65gp92Ah3y85rSgbO7tE1Owyqzp5sZ4wGOAtj9euZoMfm4J0D72EHgOvd7qyOIZ1mauJT8eGmEvCa3kML6RIx4U4WN5I7dDW8AYRxpZVQZTPixuSimk6cxd4kc5eufjXEouIcK0alTY9nhycQRtuGmp%2Br%2BFOB9QM13zpO4ZDJe0mvK31lOZtACuduFLuWw4Nor1v2E4fI1JFdU0O7uMmNsxfkQF1CjAiqkiIE2mKqT5IzgQ8ALdciXBAIkfKZWfshHl6fvg0ocbLAdyCGpC6LuluPLlEVA6QSkLJ4S6XjntF4ZcOiF%2BXbPDTc0BCRZ5%2Bl7M4fP0Bwh6UDYpu1JeNSLo7HdXzAuPVnDwCbjvXVIOh3%2BENKW0oVOQtebcPBixjNhscZgGLSUJ84laKCptQ4lLoueiY7k2RmEsMzSH3OSV8FyWnO5PNmIl0wMWbKm0pZGV5yphgZZ1qAtC%2Bsbhul2W2QFyEoVRq4qbfogbjOdvxVgwYW%2Bn5P%2FHi9%2F0NZvyMSn6NRVIFA7%2BwlypQZmwKOw1%2B0VN4LQdWYVv0qD9zap8KfrOJhphYwxyAW8wbSnz47BEkuUC2xE2J0e8gW%2B%2BFM9dGre%2B5Z8Olf9O7%2BWacTgqds5lkKMtOc3xGaVfYe%2F5ncISOw0pvGyOJUwPlT0eyPr4T0Z4%2FD8ErgWtrnqV%2Bq2OJO%2Bpb5eSUtRxkR3XiFKAx8BvtUi3wJBYw35mRh1Pgvqy8mNIaaFOexlMFhnS0Pdt1OA4HZDLa%2B1EuasZSCPyq8H%2BFWlFuIeMy7L574TQrmPWujN4f9DKCSYenEnma2NFkk1Kx1Az6aRs%2Bzy0C7Vwbw0KEXWBrOObB9zDa6y85ldhNl7OiJ1tGQcjFVEED3BEy47qRtKiBUnC%2Bm1wlszCG5fgfqCy7AnSFTCSB7hDOKK2hR9R6gsV12w89OsyRq24d%2B9S3ltcjASrCn%2BlA%2B4H7NeziCgERmu7%2FqCPpdmR0vCr9HaSdwcAsNt4Fv%2FkTnXbkPKIdi2XFHFxJRKOxWB8yABKophbWqkKmlIp0iS0gkDKOw6p1cUVDcjIalnOoqkmuTHeNm7CxEMsSCTE9fIgeCaRm3RHdQBHhLYiPIgEdGCKgN3uywu1ZgAt6fOjO7VluE%2BUKUyTDsMtbCu%2FEVIEfw3KdUc%2FwTL%2B4bu2SDJadClqzVuI4m9ujzeGF4TCSVUDkk5K2U63SnX0Cl4sfLX%2ByMImA5yejNbxuyM82%2FRtEPiGGS1vhDkdeKPQcQ6s%2F1PYpFGQstAewWUIkYTlmJxRNUdFkK399Y0JkrSLXQHsseqgwhM1XuCUyWjn3S8XrBZ5eNR58JnfSwmiNUHUPQA74u03oNYc27%2FFYqGPxQW%2FYxzfQQDEu69Op1Qa33tyI1WpgsHXhvaZHFc3oh1w5vxTTazt1ElF3VIEYkDN7sjSn3%2FbMS1OzmPjU%2F%2Be7Wg7fzs1%2FjEX8%2FIDUqBjOewHP7CrYeYHdYkoimZEQBU9lmadthNU9m0%2FRGYWKfuG%2Fe5%2BDjp3Qx%2FQXWu7Lxfe1thBygdeIAhWyRJBRni9%2FTFI0WSpVzIvXMUd%2Fb9%2FCQ%2BMlFvNdUyKHnBejB%2Bh%2FnJ7%2FYmjmB4vmXkNt%2BUwTV9WlDqWvyKY7kQ0B0jAnK5%2BrtdbaPmr2oSLTgDe2v9GQmfNT5nMPx1YwRC5F8w0MtD3oHGLEHW4lmPDdLFHKg0v3tRXjMc7ja96%2BGv6sD7i%2Fha5JHMwMkGGqsSIsXtDpYtaZb0%2FQH4AvDwHw2PgopNTR4wk3Tx9qG4UGghLI0I8s4I4x60Km%2F0wzNqf%2FjS%2FaU5%2FhLsvDwN5ZxBsR2wp5mIP%2FyIvepa60EStt354YsbX7KgcIDIDmVYLjGwl9Egp806ylIPCJOQWp4BavNT%2Fj%2BNRja7RA104yB2EGty9cG3Feq7jt3tEtUPZf7kqUFsCscNvJBVt4ZP1n5rs%2BcMDJlVAgojrJ6YaA6Z3sFqR5qx8p4O1Dt1UHr%2Frhstc7lPlVMtkFkTMpTbooQE3Y3sjWyifIC%2BkrXbBeAAoiPTKk%2FeJ5t48Vf3DFfbH%2FeLZDSZD1PvVY%2FsEu9BBedBm0s%2BVPYWidtWLKc2FUP8NdXkZ6Ii7xikIrp3T8tIkWgIWxky9PZ8CX0gY%2BJ4k1TyC3UVX1OLF4FGiXpPZN1sdMbXqWBnseTfIdvYSewapZJApBiGEtkwakTwE5%2FxwtXvdFPSZpAwK%2F1tXKnC0GhBHsqXzyiEPFU01%2FP%2BZK%2Fe7jLidHH%2FkV5y5mYeYTlzkBCTZGWRTtBTOatQVLkgLmFEZ%2FOukua4791EokjBMsuVh2P6OabMvS6xZ0g3F66pPwPxCTqaus8Op9MqVJ5AX5Hjpaq2QumN%2B32mkBY1R7kDhhnythtuQ0atrUJy3JanyWHHGuabGcGfLVDYoyYPthq1vOQY9r0gdXlraGitUe%2F3iOC9Rk27%2BQul5Hbwqn7gfOs9f7fpKK45RtYDwWZqhhKjFAx6nfV0rVQoEE2cQKFJ1RVAx646OQPoE43%2B5hME1EL1dwpMC51bzr%2F3Dda55e8DqqL0hzkLtH9ckGbTDokj1U8oi8ssBpc7faaCJXL%2BFdI69oHIIxROmyopgvDM5Vme%2BJeV4c2E%2FUjG%2B1%2F1G8E0CXDqV7R49muJmC6JXmKupyODFhiEI%2BzTLtOi4HV69HMB04EoTYybIOs%2F807BFsZ8ePrJhU7fxixCXZTclAt5eGU6y4SO6ir8iKQHmNCqDmIgr%2FuUuIUY9R%2Bvnspvrm70dtyPDocrUbBqt8YAit%2FDDST%2FYQw6KZk5wFMf9FAS1fgQAh4J4VCtmVHY7DqHyfazkQUbu8JKVrqKYGFB3QceRQeVjUIll6mnVd6RF%2BoHvX99VZT7sA%2Bz9R1nGmqQkMqpU9VksHSnrDNg4XYPWAJnqv0YozXZ1lrce1SKERyHzEzRpxHdS%2B3LI0tCPZdp%2FGbZZygkGhED2%2FyBIYaislsKPxJyZFSVA5ewnPs2cDr3z%2B%2FlzxZ0oWsi9Cx5rH4fw4%2FKE0a3YNGOKhwto9ubOzkUpXIgYRhOTuqRoFFml8%2BFTpmamFxjBdewJr6CGks%2F2YdQE%2BvyCAEQzkL4dfwEiGw8P7CjMh63oUVvvQ26PeJT%2BDxC%2BubdqHBGYPM0tn0pVFI9SKMH8Vxu7DYfIXhddXb6Dr0DR1AzvtbGdWI3Y15V4tMpUdsMVyTU44Drl2xmMFNc7uKwcs4TQ8z%2Bj4eH485xiof%2Bp3hlhlhNrE3Ln1ZPD7i4dz%2F%2B%2B%2BI24Av3ga6xkA972l%2Fhr1Nq1XJRVxkeGTwG94NLdLH1URo15DFgJvD2eu0BJopnr01KgS%2FLW4zt1ridXcyqnKg%2F9nF82KeZre4kAbAnZcuYddoh6WOL2HqI3VaNxVgt4Xwh0VmtejrgzbuPHvk563ymjiCvTsQ2isciZ8gsMfpUgGfxF1G%2B4XOhgI%2BsI8BjUt3wxAkZ3xz8ewyIalk3%2Fdg5N4cudYUWhtBrplA0H0%2BuRv43uewGxMvJpL%2FFfsTqcdkger1HwJdyRx8GHdwS647l0bJh88BsWqldDueX1X4n5gce9NcmKUZUOP1aFFSCXCROcFu%2FTyyHG82h5AZheYXIoTYGQD8U%2B2q2%2FWIiVn3%2Bs6GkYc9wN5UNd5zw3XWzmOPbRkvaUdVk9x2pF6cN20JMFeXsteczw%2BXTh48DA0mxE2tN7sLmJrofuI0dVTJEmK0tR1qU53WbeKogv5baSc2RYy%2Bt0JSYLH9YDTb1wOIOjPTR2y%2FLkA7saqO6aUw6jR8vgy2tIZbREjtc14%2B0TJTU%2FOgDoBoxsO3Wx9ZkGOcZRwIRw8CHhKTHvqhixm36cGhIE2XHT96ruE1cM%2BiRSS16cMMmVCj%2F57cI71nunKDH8LX93xNIwERhX4kM45R85xG4b5opqa6raAmrg6sV3WkVhZcVrgSudAQEIyW5UJwB2cDzOcwm6G%2B062U3%2F08l83hkQ9JcstgIQi%2F5%2FZ%2FZk5HppaYuhAocXXrgA%2Bzz7qsuUozZGC0UGxNnA%2FP3rhWZXl9b46NyZlvHtP1y3FnbYhPDoJw7JZLeush6C3TYGR2f9JUxL6i9ucWNFLbZnuofVrfnI2vtK7H1oNcjA%2Fdxo%2FwwJebQgg0JyCmCk%2BRJMJ%2Fv0yC8fwbivVgtMlBdc2y9kVQfutEK1mdhrST8dkgpBTS%2Fd7EUvtM1ZIRlPEls8cZswC9Drkl429SrU1EcCFNgeNgWiUWYm965Ap6pts0O3gSw47O6gmvks74FCyLnqaOJjI1BTjJ2ClMHsZXoLQMJ7x%2FL%2FnI%2BhrQiMbqmRlDehl2%2BdERj9%2FsOKLLF1NTcYcQPo%2BuC6tOglQqLu9Szhcu2Y3uOhnTiQf7tCEOVP8NvL1p7LgqSbVytpM%2F%2Bgss77wsX11YJwSRK6GlNt5t%2BfszOm3VACqMvbAGrvC58kxIbknR91fJrRxhqfZrojkBlTllYM86phlozv2e%2FOV2UoqjJjqNEDUgS5a9Tk3xhIm6cUe9GPwV3u%2BCOuKQvgnCW7tGIyfQ8C2NMqqXFIBLm%2FFJXTo5MBav%2B2Tkg817NyO3VbBjDz%2FXBBR%2Bpmgs6zxteAHXOzwVrKFOs9xi3LgIbc7BRRPmVUzU6qqntTHu%2BtIslL3fjokP6vS5zyjJz03GH7fOhDzIu%2BiLfFuUw7Dpx52k9ljnalECaNxElmQQXjN4HpgsPOCV7jwsFwz8uWt%2FBl7k413796KgAzUY9FYKWcFHeijQtAOChQWFsH1NPGIvrmsd1EncuMlxmojmOAPBDfMjvxoAffOyYaTRnV5H2OVz%2BW7nybDZXJY07fUMUakjDpD3cu2FzwCLPMkgQnDroDTgcm%2FnvdXdjWUGf7JiSbej4wMObVwrC3vsPVeD8B8E%2Fb%2BAOij72Edyld0TzCiHFVvJKpK1ThmKwpAOWhsGFeoOy2XKlKj1HbNCUbXh4zpUzjli81dbuXw3j78DUpkopXFdeLAYsfgX5E1Sti30UNInMkrsdYaHXzkWzWJ1%2Fc8x%2FYzC1wyd5sP%2FdFLVJeWq%2BsqZ6dO5TZEoQOamLbVFr78Lz%2BfO0dUxCbMqdj%2F0JuM15PBr57aHJ5EvbAMhyDmeuow%2FXXNxddfICOlJbRK3VUod4zi2ZBTke3JXAaDf44GA5I2fVMWWcrNtnWrGCLWp6hS16CGPasNkVoRz%2BxBoK76luHOf6LBmrkgTmty1pm8iIvfng6vq6cmNT17sS1fKCGoW913T3hVVV6%2Bn4NyOyDll1JVSidIF%2FrO6SNG9tWz10o1ldoQS5pjJqoGFgkKCU6gu%2BPIeFnJc%2BuKs97rrkOT8zOSjEuRTgdcMRZdXaSif%2B4PhZfZI%3D&__EVENTVALIDATION=WlgplHGB9NnLpNjUKDYcxfRa21mhH%2BYXkMId0u8RWxlL0kfcd8yYQfM8quLQYcyDNnqg7DtHdAoech0sjqSjxqqDNXbyuQjF6PHVhXoKepzkzKRN4HdRTu8on%2B1BWOPzwtpySzcUAJHyfUTAuJ66FiHt47L6bHVFzCEApKv4r%2FhU8V0Hq8a8e8T2PSQy%2B5N0%2FLcKN9by9Tn7pKArk8FBHE%2Fi2en3GHGjpN%2FSL4fqAwLfcQZT&ctl00%24ContentMain%24Accordion0_AccordionExtender_ClientState=-1&ctl00%24ContentMain%24Accordion2_AccordionExtender_ClientState=-1&ctl00%24ContentMain%24TxtNumGSM=$num&ctl00%24ContentMain%24TxtCodeSecret=$pass&ctl00%24ContentMain%24Btn_ValiderGSM=VALIDER&ctl00%24ContentMain%24AccordeonSuivi_AccordionExtender_ClientState=-1&ctl00%24ContentMain%24ctl18%24Accordion7_AccordionExtender_ClientState=-1" \
"${site}"
wget --keep-session-cookies --save-cookies $cookies --load-cookies $cookies "${conso}"