Essential System Administration: Commands and File Formats (Pocket Reference)

By Æleen Frisch

If you're a Unix approach administrator, then the knowledge you would like on a daily basis simply to get your task performed may fill a book--a very huge publication. yet, essentially talking, you don't are looking to cease and thumb via a weighty quantity every time a challenge arises. Your resolution is the Essential process management Pocket Reference, the single method management reference that matches on your pocket. Concise and easy-to-use, this little ebook is the transportable better half to the vintage Essential approach Administration via AEleen Frisch.

The Essential procedure management Pocket Reference is a brief connection with all of the basic and crucial projects required to run such divergent Unix structures as Solaris, Linux, AIX, BSD, SuSe, crimson Hat, and extra. newcomers and skilled directors alike will quick be ready to follow its ideas and recommendation to resolve daily difficulties. The ebook is split into 3 elements: instructions, Syntax and Their functions, Configuration records and codecs, and working method particular details. the data during this e-book is a must have for any administrator or person of a Unix system.

O'Reilly's Pocket References became a favourite between know-how execs far and wide. through supplying a wealth of significant information in a concise, well-organized layout, those convenient books convey simply what you must entire the duty handy. whilst you've reached a sticking element and want to get to an answer speedy, the hot Essential procedure management Pocket Reference is the e-book you'll are looking to have.

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Hostname hostname [name] demonstrate or set the hostname. nfsstat nfsstat [options] show NFS statistics. recommendations -rc reveal buyer information. -s demonstrate server records. -n Exclude RPC facts. nslookup nslookup [options] [host] [name-server] question net identify servers. with out arguments, the command starts off an interactive consultation. 108 | crucial process management Pocket Reference Subcommands merchandise Retrieve files for this merchandise (interpreted as a hostname via default). set type=record-type kind of files to come back (the default is A). server host Use this server for queries. go out finish consultation. netstat netstat [options] [rsecs] with no arguments, lists all lively community connections with the neighborhood host. If the argument is integrated, the demonstrate is continuing and is refreshed each rsecs seconds. On Linux structures, the -c alternative is used as a substitute (refresh period = 1 second). techniques -a comprise passive connections within the connections record. -r demonstrate routing tables. -i exhibit a precis of the community interfaces. -I interface restrict the exhibit to the desired community interface. On Linux platforms, the interface parameter is used with -i. -s demonstrate information for every community protocol. -p proto restrict the show to the desired protocol. On Linux structures, use the --raw, --upd, or --tcp choice as an alternative. -n exhibit community addresses as numbers (useful whilst DNS is unavailable or suspect). nslookup | 109 ping ping host [packet-size count number] AIX, HP-UX ping -c count number [-s packet-size] host AIX, FreeBSD, Linux ping -s host packet-size count number Solaris payment community connectivity with a distant host. the second one and 3rd varieties indexed ping the desired host count number instances after which reveal precis facts. packetsize is the specified packet dimension. while just a hostname is particular, the command will ping continually until eventually interrupted (except less than Solaris, which pings in basic terms once). traceroute traceroute [-n] vacation spot demonstrate the path to a distant vacation spot. The -n alternative says to demonstrate a numeric host deal with (useful whilst DNS is unavailable/suspect). email correspondence /etc/aliases dossier alias: identify [name ... ] outline a mail alias because the distinctive checklist of user(s) and/or different aliases. Aliases might be nested. An preliminary backslash defines a terminal alias (not topic to extra expansion). This dossier is kept in /etc/mail/aliases below FreeBSD and HP-UX. sendmail File/directory destinations Boot script configuration dossier FreeBSD: /etc/rc. conf: HP-UX: /etc/rc. config. d/mailservs: sendmail_enable="YES" export SENDMAIL_SERVER=1 one hundred ten | crucial method management Pocket Reference Linux: /etc/sysconfig/sendmail: Solaris: /etc/default/sendmail: START_SENDMAIL="yes" DAEMON=yes sendmail. cf listing traditional: AIX: /etc/mail /etc /etc Linux: Configuration dossier construct sector AIX: FreeBSD: HP-UX: Linux: Solaris: /usr/samples/tcpip/sendmail/cf /usr/share/sendmail/cf/cf /usr/newconfig/etc/mail/cf/cf /usr/share/sendmail-cf/cf (Red Hat) /usr/share/sendmail/cf (SuSE) /usr/lib/mail/cf syslog mail facility messages FreeBSD: HP-UX: Linux: Solaris: /var/log/maillog /var/adm/syslog/mail.

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