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Live CD

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29: 172:, it was adapted for use as a medium for storing and distributing large amounts of computer data. This data may also include application and operating-system software, sometimes packaged and archived in compressed formats. Later, it was seen to be convenient and useful to boot the computer directly from compact disc, often with a minimal working system to install a full system onto a hard drive. While there are read-write optical discs, either mass-produced read-only discs or write-once discs were used for this purpose. 321:
provide a significant performance boost, as RAM is much faster than a hard drive, and uses less power. Experienced users of the operating system may also use a live CD to determine whether and to what extent a particular operating system or version is compatible with a particular hardware configuration and certain peripherals, or as a way to know beforehand which computer or peripheral will work before buying. A live CD can be used to troubleshoot hardware, especially when a hard drive fails, and more generally as a
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operating system). Software can be tested, or run for a particular single use, without interfering with system setup. Data on a system which is not functioning normally due to operating system and software issues can be made available; for example, data can be recovered from a machine with an active
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Although some live CDs can load into memory to free the optical drive for other uses, loading the data from a CD-ROM is still slower than a typical hard drive boot, so this is rarely the default with large live CD images, but for smaller live CD images loading the filesystem directly into RAM can
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All computers except the earliest digital computers are built with some form of minimal built-in loader, which loads a program or succession of programs from a storage medium, which then operate the computer. Initially a read-only medium such as punched tape or punched cards was used for initial
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Unlike previous operating systems on optical media, though, Linux and OS/2 "live CDs" were specifically designed to run without installation onto other media like a hard disk drive. The live CD concept was meant to promote Linux and showcase the abilities of the free,
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in case of problems. Some live CDs can save user-created files in a Windows partition, a USB drive, a network drive, or other accessible media. Live backup CDs can create an image of drives, and back up files, without problems due to open files and inconsistent sets.
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Several live CDs are dedicated to specific type of applications according to the requirements of thematic user communities. These CDs are tailored to the needs of the applications in subject including general knowledge, tutorial, specifications and trial data too.
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This was a new and different situation for Linux than other operating systems, because the updates/upgrades were being released so quickly, different distributions and versions were being offered online, and especially because users were burning their own CDs.
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operating system was meeting resistance in the consumer market because of the perceived difficulty, effort, and risk involved in installing an additional partition on the hard disk, in parallel with an existing operating system installation.
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During live CD initialization, a user typically may resort to using one or more boot codes to change the booting behavior. These vary from distribution to distribution but can most often be accessed upon first boot screen by one of the
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The term "live CD" was coined because, after typical PC RAM was large enough and 52x speed CD drives and CD burners were widespread among PC owners, it finally became convenient and practical to boot the kernel and run
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The term "Live CD" came to be used for any CD containing operating system and software which could be run without installation on the host computer. Operating systems which can be used live include
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Some of these topics covers sub topics, e.g. IT administration breaks down to firewall, rescue, security, etc. type of live CDs. In some cases a particular Live DVD covers more than one topic.
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medium, changes made during use (such as files created, programs installed, and preferences customised) are written in a new session to the boot medium persisting through subsequent boots.
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functionality. This came out of necessity to avoid requiring the user to configure the system each time it boots and to make it easily usable by those who are new to the operating system.
776:) are kept in ramdisk, because the system updates them frequently. Puppy Linux and some other live CDs allow a configuration and added files to be written and used in later sessions. 440:
Typically after booting the machine from the live CD, the appliance either runs in non-persistent demo mode or installs itself, at the user's request, to an available storage device.
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first released in beta form 1992~1993 (ceased production in 1995), though in practice its functionality was hampered due to the low throughput of contemporary CD-ROM drives.
257:, first released in 1999, was the first Live CD to focus on system administration, and the first to be distributed in the bootable business card form factor. As of 2023, 183:
or the CD itself would boot specifically, and only, to install onto a hard drive. Early examples of operating systems which could be booted directly from CD-ROM are the
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CDs or "distros" were generally treated as a collection of installation packages that would first need to be permanently installed to hard disks on the target machine.
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The first Compact Disc drives on personal computers were generally much too slow to run complex operating systems; computers were not designed to boot from an
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is aimed at preserving privacy and anonymity of its users, allowing them to work with sensitive documents without leaving a record on a computer's hard drive.
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virus infection without the virus process being active and causing more damage, and the virus can be removed with its defences against removal bypassed.
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as an installable live CD, or live ISO, can often be beneficial as a single image can run on both real hardware and on most types of virtual machines.
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Live CDs are made for many different uses. Some are designed to demonstrate or "test drive" a particular operating system (usually Linux or another
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for any purpose without installing it or making any changes to the computer's configuration. Live CDs can run on a computer without
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or similar storage device into a computer's memory, rather than loading from a hard disk drive. A live CD allows users to run an
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available for burning to CD or DVD. While open source operating systems can be used for free, some commercial software, such as
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Some live CDs come with an installation utility launchable from a desktop icon that can optionally install the system on a
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in 1990.. Earlier examples of live OS are of course the operating systems used from floppy, and most widely spread is
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could take advantage of cheap optical disks and rapidly declining prices of CD drives for personal computers, the
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specification, introduced in 1994. Many Linux based live CDs use a compressed filesystem image, often with the
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compressed filesystem, generally doubling effective storage capacity, although slowing application start up.
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After mounting the live CD's filesystem, software on the live CD can be run directly, without booting it, by
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systems include around 1,200 separate software packages. Live CDs have a reputation for supporting advanced
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As CD and DVD drives have been steadily phased-out, live CDs have become less popular, being replaced by
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The first personal computer operating system on a CD to support "live" operations might have been the
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media, requiring either copying to rewriteable media (i.e. a hard drive or CD writer) or complete
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operating system on conventional personal computers with Microsoft Windows already installed.
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This allows developers to avoid the complexities involved in supporting multiple incompatible
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providing a secure, reliable platform for the performance of high-vulnerability tasks such as
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now include a live CD variant, which in some cases is also the preferred installation medium.
1535: 1501: 1403: 1339: 861: 796: 641: 76: 1732: 1706: 250:, released in 1998, was the first Linux distribution specially designed as a live CD. The 79:, such as a hard disk drive, or with a corrupted hard disk drive or file system, allowing 8: 1701: 1653: 1530: 703: 574: 477: 313: 1232: 1638: 1545: 1052: 866: 765: 733: 511: 427: 340: 334: 285: 212: 118: 106: 1747: 1696: 1628: 1585: 1426: 1059: 954: 710: 617: 473: 395: 381:
playing video games or running applications that require a different operating system
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providing a secure server platform where crucial files cannot be permanently altered
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and public computers, which can be brought back to their original state by a reboot
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Since 2003, the popularity of live CDs has increased substantially, partly due to
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However, in the case of these distributions built on top of the Linux kernel, the
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program load. With the introduction of inexpensive read-write storage, read-write
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Live CDs have to be able to detect and use a wide variety of hardware (including
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Although early developers and users of distributions built on top of the
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Complete, bootable computer installation that runs directly from a CD-ROM
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requires a license to use. Many live CDs are used for data recovery,
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images formats and focus on the lowest common denominator instead.
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to install additional software; however, there are exceptions. If
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CD-ROM of the LGX Yggdrasil Linux distribution release "Fall 1993"
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In modern live CDs, a read-only file system is merged with a
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being the primary or backup operating system for any computer
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Operating system distributions bootable from read-only media
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Test Driving Linux: From Windows to Linux in 60 Seconds
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system and as a primary distribution in its own right.
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The resulting environment can be quite rich: typical
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by writing files to a hard drive or USB flash drive.
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23.04 system running from a live DVD image, with the
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connected by USB. Many live CDs offer the option of
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Archived from 1778: 921: 679:, which could be booted from CD on an 409: 187:, and the Desktop-VMS distribution of 149:Installation from Ubuntu 23.04 live CD 1278: 1252: 1180:from the original on 22 February 2014 1170:"USB Installation Media - UNetbootin" 986:"DECUServe WORKSTATIONS Conference 8" 952: 890: 569:Live CDs are usually distributed on 13: 1090:from the original on 19 March 2018 934:from the original on 19 April 2014 345:Virus scanning and Malware removal 14: 1807: 1226: 996:from the original on 10 July 2022 984:Bob McCormick (11 January 1989). 903:from the original on 20 July 2014 1375:Object-oriented operating system 965:from the original on 16 May 2022 354:testing new versions of software 63:computer installation including 1206:. 26 April 2011. Archived from 1192: 1162: 1150:from the original on 9 May 2008 922:Finley, Klint (14 April 2014). 897:Freedom of the Press Foundation 721:compressed loopback driver, or 620:installation and repair discs, 329:A few additional uses include: 1385:Supercomputer operating system 1132: 1102: 1072: 1008: 977: 946: 915: 884: 357:listing & testing hardware 165:After the introduction of the 1: 891:Timm, Trevor (2 April 2014). 877: 499:into the mounted filesystem. 462:6.3-Release-i386-bootonly.iso 1360:Just enough operating system 1345:Distributed operating system 852:List of remastering software 158:and hard disks were used as 7: 1473:User space and kernel space 825: 743: 529: 526:can automate this process. 67:which runs directly from a 10: 1812: 1380:Real-time operating system 756:. Often the default Linux 140: 18: 1715: 1652: 1598: 1576:Multilevel feedback queue 1571:Fixed-priority preemptive 1559: 1494: 1485: 1455: 1402: 1393: 1355:Hobbyist operating system 1350:Embedded operating system 1332: 1286: 514:or can be converted to a 456:machine configuration in 1619:General protection fault 1370:Network operating system 1324:User features comparison 1050:Brickner, David (2005). 444:Mounting without burning 372:network security testing 194: 96:external hard disk drive 21:Live CD (disambiguation) 1365:Mobile operating system 772:" (containing variable 581:is recorded to an open 488:variants by mounting a 468:The files on a live CD 291: 1468:Loadable kernel module 698: 566:and USB flash drives. 543: 465: 460:with live image file ( 423: 398:and other restrictions 305: 255:bootable business card 204: 150: 135:Tails operating system 40: 1536:Process control block 1502:Computer multitasking 1340:Disk operating system 1144:flashmobcomputing.org 862:Self-booting diskette 693: 642:Plan 9 from Bell Labs 537: 451: 417: 299: 242:-based 'Live CD' was 202: 148: 57:live operating system 31: 1707:Virtual tape library 1299:Forensic engineering 1233:Bootable CDROM HowTo 1176:. Ubuntu Community. 1174:community.ubuntu.com 1110:"Home - HDT Project" 959:Old-Computers Museum 656:and others based on 19:For other uses, see 1796:Software appliances 1716:Supporting concepts 1702:Virtual file system 787:techniques such as 766:configuration files 478:disk image emulator 472:can be accessed in 410:Software appliances 286:Linux distributions 107:Linux distributions 39:desktop environment 1639:Segmentation fault 1487:Process management 1243:Pondering Live CDs 1238:Linux Live scripts 955:"Fujitsu FM Towns" 867:Software appliance 734:auto-configuration 699: 544: 512:VMware Workstation 466: 428:software appliance 424: 348:system repair and 341:computer forensics 335:Linux distribution 306: 278:Linux Live scripts 213:Linux distribution 205: 151: 119:computer forensics 41: 1773: 1772: 1629:Memory protection 1600:Memory management 1594: 1593: 1586:Shortest job next 1481: 1480: 1280:Operating systems 1028:on 16 August 2000 618:Microsoft Windows 506:software such as 474:Microsoft Windows 396:parental controls 77:secondary storage 1803: 1728:Computer network 1492: 1491: 1400: 1399: 1273: 1266: 1259: 1250: 1249: 1220: 1219: 1217: 1215: 1210:on 1 August 2018 1196: 1190: 1189: 1187: 1185: 1166: 1160: 1159: 1157: 1155: 1136: 1130: 1129: 1127: 1125: 1116:. Archived from 1106: 1100: 1099: 1097: 1095: 1076: 1070: 1069: 1057: 1047: 1038: 1037: 1035: 1033: 1027: 1020: 1012: 1006: 1005: 1003: 1001: 981: 975: 974: 972: 970: 950: 944: 943: 941: 939: 919: 913: 912: 910: 908: 888: 847:List of live CDs 771: 763: 389:internet banking 92:USB flash drives 73:operating system 65:operating system 59:) is a complete 1811: 1810: 1806: 1805: 1804: 1802: 1801: 1800: 1776: 1775: 1774: 1769: 1711: 1672:Defragmentation 1657: 1648: 1634:Protection ring 1603: 1590: 1562: 1555: 1477: 1451: 1389: 1328: 1282: 1277: 1229: 1224: 1223: 1213: 1211: 1198: 1197: 1193: 1183: 1181: 1168: 1167: 1163: 1153: 1151: 1138: 1137: 1133: 1123: 1121: 1120:on 25 July 2018 1108: 1107: 1103: 1093: 1091: 1078: 1077: 1073: 1066: 1048: 1041: 1031: 1029: 1025: 1018: 1014: 1013: 1009: 999: 997: 982: 978: 968: 966: 951: 947: 937: 935: 920: 916: 906: 904: 889: 885: 880: 828: 769: 761: 746: 560:USB flash drive 532: 504:Virtual Machine 446: 435:virtual machine 412: 361:Internet kiosks 337:to a hard drive 294: 244:Yggdrasil Linux 197: 143: 127:system recovery 24: 17: 12: 11: 5: 1809: 1799: 1798: 1793: 1788: 1771: 1770: 1768: 1767: 1762: 1761: 1760: 1758:User interface 1755: 1745: 1740: 1735: 1730: 1725: 1719: 1717: 1713: 1712: 1710: 1709: 1704: 1699: 1694: 1689: 1684: 1682:File attribute 1679: 1674: 1669: 1663: 1661: 1650: 1649: 1647: 1646: 1644:Virtual memory 1641: 1636: 1631: 1626: 1621: 1616: 1610: 1608: 1596: 1595: 1592: 1591: 1589: 1588: 1583: 1578: 1573: 1567: 1565: 1557: 1556: 1554: 1553: 1548: 1543: 1538: 1533: 1528: 1523: 1518: 1516:Context switch 1513: 1498: 1496: 1489: 1483: 1482: 1479: 1478: 1476: 1475: 1470: 1465: 1459: 1457: 1453: 1452: 1450: 1449: 1444: 1439: 1434: 1429: 1424: 1419: 1414: 1408: 1406: 1397: 1391: 1390: 1388: 1387: 1382: 1377: 1372: 1367: 1362: 1357: 1352: 1347: 1342: 1336: 1334: 1330: 1329: 1327: 1326: 1321: 1316: 1311: 1306: 1301: 1296: 1290: 1288: 1284: 1283: 1276: 1275: 1268: 1261: 1253: 1247: 1246: 1240: 1235: 1228: 1227:External links 1225: 1222: 1221: 1191: 1161: 1131: 1101: 1071: 1064: 1039: 1007: 976: 945: 914: 882: 881: 879: 876: 875: 874: 869: 864: 859: 854: 849: 844: 839: 834: 827: 824: 745: 742: 610:classic Mac OS 531: 528: 445: 442: 411: 408: 400: 399: 392: 385: 382: 379: 376: 373: 370: 367: 364: 358: 355: 352: 346: 343: 338: 293: 290: 196: 193: 142: 139: 15: 9: 6: 4: 3: 2: 1808: 1797: 1794: 1792: 1789: 1787: 1784: 1783: 1781: 1766: 1763: 1759: 1756: 1754: 1751: 1750: 1749: 1746: 1744: 1741: 1739: 1736: 1734: 1731: 1729: 1726: 1724: 1721: 1720: 1718: 1714: 1708: 1705: 1703: 1700: 1698: 1695: 1693: 1690: 1688: 1685: 1683: 1680: 1678: 1675: 1673: 1670: 1668: 1665: 1664: 1662: 1660: 1655: 1651: 1645: 1642: 1640: 1637: 1635: 1632: 1630: 1627: 1625: 1624:Memory paging 1622: 1620: 1617: 1615: 1612: 1611: 1609: 1606: 1601: 1597: 1587: 1584: 1582: 1579: 1577: 1574: 1572: 1569: 1568: 1566: 1564: 1558: 1552: 1549: 1547: 1544: 1542: 1539: 1537: 1534: 1532: 1529: 1527: 1524: 1522: 1519: 1517: 1514: 1511: 1507: 1503: 1500: 1499: 1497: 1493: 1490: 1488: 1484: 1474: 1471: 1469: 1466: 1464: 1463:Device driver 1461: 1460: 1458: 1454: 1448: 1445: 1443: 1440: 1438: 1435: 1433: 1430: 1428: 1425: 1423: 1420: 1418: 1415: 1413: 1410: 1409: 1407: 1405: 1404:Architectures 1401: 1398: 1396: 1392: 1386: 1383: 1381: 1378: 1376: 1373: 1371: 1368: 1366: 1363: 1361: 1358: 1356: 1353: 1351: 1348: 1346: 1343: 1341: 1338: 1337: 1335: 1331: 1325: 1322: 1320: 1317: 1315: 1312: 1310: 1307: 1305: 1302: 1300: 1297: 1295: 1292: 1291: 1289: 1285: 1281: 1274: 1269: 1267: 1262: 1260: 1255: 1254: 1251: 1244: 1241: 1239: 1236: 1234: 1231: 1230: 1209: 1205: 1201: 1195: 1179: 1175: 1171: 1165: 1149: 1145: 1141: 1135: 1119: 1115: 1111: 1105: 1089: 1085: 1084:howtogeek.com 1081: 1075: 1067: 1065:0-596-00754-X 1061: 1056: 1055: 1046: 1044: 1024: 1017: 1011: 995: 991: 987: 980: 964: 960: 956: 949: 933: 929: 925: 918: 902: 898: 894: 887: 883: 873: 872:Windows To Go 870: 868: 865: 863: 860: 858: 855: 853: 850: 848: 845: 843: 840: 838: 835: 833: 830: 829: 823: 821: 817: 813: 809: 808:graphic cards 805: 804:network cards 800: 798: 794: 790: 786: 782: 777: 775: 767: 759: 755: 751: 741: 739: 738:plug-and-play 735: 731: 726: 724: 720: 716: 712: 707: 705: 697: 692: 688: 686: 682: 678: 673: 671: 667: 663: 659: 655: 651: 647: 643: 639: 635: 631: 627: 623: 619: 615: 611: 607: 603: 599: 595: 591: 586: 584: 580: 576: 572: 567: 565: 561: 557: 552: 550: 549:function keys 541: 536: 527: 525: 524:Special tools 521: 517: 513: 509: 505: 500: 498: 493: 491: 487: 483: 479: 475: 471: 463: 459: 455: 450: 441: 438: 436: 431: 429: 421: 416: 407: 404: 397: 393: 390: 386: 383: 380: 377: 374: 371: 368: 365: 362: 359: 356: 353: 351: 347: 344: 342: 339: 336: 333:installing a 332: 331: 330: 327: 324: 323:recovery disc 318: 315: 311: 303: 298: 289: 287: 283: 279: 274: 272: 268: 264: 260: 256: 253: 249: 245: 241: 236: 232: 230: 224: 221: 216: 214: 210: 201: 192: 190: 186: 182: 178: 173: 171: 168: 163: 161: 157: 147: 138: 136: 133:removal. The 132: 128: 124: 120: 116: 115:Windows To Go 112: 108: 103: 101: 97: 93: 89: 84: 82: 81:data recovery 78: 74: 70: 66: 62: 58: 54: 50: 46: 38: 34: 30: 26: 22: 1737: 1659:file systems 1551:Time-sharing 1212:. Retrieved 1208:the original 1203: 1194: 1182:. Retrieved 1173: 1164: 1152:. Retrieved 1143: 1134: 1122:. Retrieved 1118:the original 1113: 1104: 1092:. Retrieved 1083: 1074: 1058:. O'Reilly. 1053: 1030:. Retrieved 1023:the original 1010: 998:. Retrieved 989: 979: 967:. Retrieved 958: 948: 936:. Retrieved 927: 917: 905:. Retrieved 896: 886: 842:GIS Live DVD 820:Linux kernel 801: 778: 748:A read-only 747: 727: 708: 700: 696:Gentoo Linux 674: 587: 583:multisession 568: 553: 545: 501: 494: 482:Daemon Tools 467: 461: 439: 432: 426:Packaging a 425: 405: 401: 328: 319: 307: 275: 237: 233: 225: 217: 209:Linux kernel 206: 177:optical disc 174: 170:compact disc 164: 156:floppy disks 152: 123:disk imaging 104: 85: 56: 52: 48: 44: 42: 25: 1677:Device file 1667:Boot loader 1581:Round-robin 1506:Cooperative 1442:Rump kernel 1432:Multikernel 1422:Microkernel 1319:Usage share 1204:Puppy Linux 1184:11 February 1114:HDT Project 990:home.iae.nl 785:transparent 758:directories 750:file system 704:open source 694:Live CD of 650:OpenSolaris 579:Puppy Linux 575:remastering 538:Live CD of 490:loop device 418:Live CD of 350:restoration 314:open source 300:Live CD of 282:remastersys 271:rescue disk 185:FM Towns OS 181:boot floppy 100:persistence 1780:Categories 1607:protection 1563:algorithms 1561:Scheduling 1510:Preemptive 1456:Components 1427:Monolithic 1294:Comparison 953:Jiro Kit. 878:References 681:Amiga CDTV 666:Windows PE 556:hard drive 508:VirtualBox 458:VirtualBox 394:Bypassing 238:The first 160:boot media 111:ISO images 1697:Partition 1614:Bus error 1541:Real-time 1521:Interrupt 1447:Unikernel 1412:Exokernel 832:Boot disk 781:RAM drive 715:El Torito 590:AmigaOS 4 571:read-only 564:diskettes 497:chrooting 470:ISO image 252:Linuxcare 248:DemoLinux 88:live USBs 53:live disc 1743:Live USB 1605:resource 1495:Concepts 1333:Variants 1314:Timeline 1214:1 August 1178:Archived 1154:19 March 1148:Archived 1124:19 March 1094:19 March 1088:Archived 1032:26 March 1000:26 March 994:Archived 969:26 March 963:Archived 938:18 April 932:Archived 907:18 April 901:Archived 857:Live USB 826:See also 754:RAM disk 744:Creation 723:squashfs 594:Amithlon 540:Mandriva 530:Features 520:SYSLINUX 516:Live USB 484:, or in 480:such as 452:Virtual 302:Trisquel 61:bootable 49:live DVD 37:GNOME 40 1786:Live CD 1738:Live CD 1692:Journal 1656:access, 1654:Storage 1531:Process 1437:vkernel 1304:History 1287:General 816:hotplug 789:UnionFS 768:) and " 730:Knoppix 677:AmigaOS 658:Solaris 654:BeleniX 646:MorphOS 638:MINIX 3 634:OpenBSD 626:ReactOS 606:FreeDOS 602:FreeBSD 476:with a 454:OpenBSD 263:Knoppix 141:History 131:malware 45:live CD 1546:Thread 1417:Hybrid 1395:Kernel 1062:  783:using 668:, and 662:BartPE 630:NetBSD 518:using 420:Fedora 267:Debian 259:Finnix 69:CD-ROM 47:(also 33:Ubuntu 1748:Shell 1687:Inode 1026:(PDF) 1019:(PDF) 928:WIRED 822:2.6. 762:/home 719:cloop 709:On a 614:macOS 240:Linux 195:Linux 167:audio 109:make 105:Many 55:, or 1309:List 1216:2018 1186:2014 1156:2018 1126:2018 1096:2018 1060:ISBN 1034:2022 1002:2022 971:2022 940:2014 909:2014 812:udev 793:AuFS 774:data 770:/var 736:and 622:OS/2 598:AROS 542:2010 510:and 486:Unix 310:free 304:11.0 292:Uses 280:and 265:, a 220:free 129:and 1765:PXE 1753:CLI 1733:HAL 1723:API 1526:IPC 797:EWF 795:or 685:DOS 558:or 312:or 229:X11 189:VMS 1782:: 1508:, 1202:. 1172:. 1146:. 1142:. 1112:. 1086:. 1082:. 1042:^ 992:. 988:. 961:. 957:. 930:. 926:. 899:. 895:. 814:, 806:, 791:, 711:PC 687:. 664:, 652:, 648:, 644:, 640:, 636:, 632:, 628:, 624:, 616:, 612:, 608:, 604:, 600:, 596:, 592:, 551:. 522:. 422:38 162:. 125:, 121:, 83:. 51:, 43:A 1602:, 1512:) 1504:( 1272:e 1265:t 1258:v 1218:. 1188:. 1158:. 1128:. 1098:. 1068:. 1036:. 1004:. 973:. 942:. 911:. 760:" 464:) 391:; 23:.

Index

Live CD (disambiguation)

Ubuntu
GNOME 40
bootable
operating system
CD-ROM
operating system
secondary storage
data recovery
live USBs
USB flash drives
external hard disk drive
persistence
Linux distributions
ISO images
Windows To Go
computer forensics
disk imaging
system recovery
malware
Tails operating system

floppy disks
boot media
audio
compact disc
optical disc
boot floppy
FM Towns OS

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