who (who is on the system)
\nwho -b (when was last reboot)
\nwho -r (current run level)
\nw (who is doing what)<\/p>\n
df -h (disk usage info in human readable form)<\/p>\n
Unix commands<\/p>\n
\u00a7cut
\n\tCut out columns from a table or fields from each line of a file
\n\u2022cut -c5
\n\tcut out at character 5
\n\u2022cut -c1,5,10
\n\tcut out at chars 1, 5, 10
\n\u2022cut -c1-10
\n\tinclusive from 1 to 10
\n\u2022cut -c5-
\n\tto eol
\n\u2022cut -d: -f1 \/etc\/password
\n\tuse : as delimiter
\n\tcut at field 1
\n\u2022cut -f1
\n\tdefault to -dTab
\n\u2022sed -n l file
\n\tprint tab as ><\/p>\n
\u00a7paste
\n\tConcatenate lines of input files.
\n\u2022paste files
\n\tConcatenate lines of input files.
\n\u2022paste -d’+’ files
\n\tUse + instead of TAB to replace NEWLINE charactem
\n\u2022paste -s file
\n\tConcatenate all lines of each file except the last line<\/p>\n
\u00a7sed
\n\u2022sed ‘s\/unix\/UNIX\/’ file
\n\treplace 1st occurance
\n\u2022sed ‘s\/unix\/UNIX\/g’ file
\n\treplace all occurance
\n\u2022who | sed ‘s\/ .*$\/\/’
\n\tdel
\n\u2022sed -n ‘1,2p’ file
\n\tprint 1st 2 lines
\n\u2022sed -n ‘\/UNIX\/p’ file
\n\tprint all lines w\/ UNIX
\n\u2022sed ‘1,2d’ file
\n\tdelete 2 lines
\n\u2022sed ‘\/UNIX\/d’ file
\n\tdelete UNIX
\n\u2022sed -n ‘l’ file
\n\ttab as >
\n\u2022Replace all occurrance of c:\/Perl to \/usr\/perl in all perl scripts in current directory<\/p>\n
for i in 'ls *.pl'\r\ndo\r\n fileName='echo $i | awk -F\".\" { print $1 }'\r\n sed 's\/c:\\\/Perl\/\\\/usr\\\/perl\/' $i > $fileName.new\r\n cp $fileName.new $fileName.pl\r\ndone\r\n<\/pre>\n\u00a7tr\t\t\tworks on single char
\n\u2022tr : ‘\t‘
\n\tcolon to tab
\n\u2022tr ‘[a-z]’ ‘[A-Z]’\tto upper case
\n\u2022tr -s ‘ ‘ ‘ ‘\t\t\tsqueeze out mult
\n\u2022tr -d ‘ ‘ < file\t\tdel all spaces\n\u2022tr '\\012' ' '\tchange new line char to space. Same as \nawk '{printf \"%s \",$0}'\n\n\n\u00a7grep\n\u2022grep pattern files\n\u2022grep -i\t\tignore case\n\u2022grep -v\t\tinverse\n\u2022grep -l\t\tlist file names only\n\u2022qrep -n\t\tshow line number\n\n\u00a7sort\n\u2022sort file\n\u2022sort -u\t\tremove dup lines\n\u2022sort -r\t\treverse sort\n\u2022sort file -o sorted_file\n\u2022sort -n file\tsort as number\n\u2022sort +2n file\tskip 2 fields,sort num\n\u2022sort +2n -t:\tdelimit by :\n\n\u00a7uniq\tonly works on consecutive \n\t\tduplicate lines\n\u2022uniq file\n\u2022sort file | uniq\t\tsort,uniq\n\u2022sort \/etc\/password | uniq -d \n\t\t\tlist duplicate lines\n\u2022sort \/etc\/password | cut -f1 -d: | uniq -d\t\tfind dup user id\n\u2022uniq -c\t\tcount dups\n\n\u00a7shift\n\u2022left shift positional parameters by 1\n\u2022shift 3\tleft shift by 3\n\nrestart inetd:\nps -ef | qrep inetd --> qet psid
\nkill -HUP \nstart inetd
\n\/etc\/init.d\/inetsvc start<\/p>\n
Patch manaqement<\/strong>
\npatchadd
\npatchrm
\nshowrev -p
\npkgparam<\/p>\nSolaris: pkgadd -d
\npkgrm SMCgcc
\npkginfo<\/p>\nlinux:
\nrpm -iv somefile.rpm
\nrpm -qa | grep binutils
\nrpm -Uvh –force –nodeps binutils-2.11.90.0.8-13.i386.rpm<\/p>\n
Enable root ssh<\/strong>
\n* Edit \/etc\/ssh\/sshd_config<\/em> and set
\nPermitRootLogin yes<\/strong>
\n*Restart network services<\/p>\n\r\nsvcadm restart svc:\/network\/ssh:default\r\n<\/pre>\nReferences<\/strong>
\nhttp:\/\/www.sun.com\/bigadmin\/shellme\/<\/a>
\nunixtoolbox<\/a>
\nlinux-unix-commands-cheat-sheets<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"who (who is on the system) who -b (when was last reboot) who -r (current run level) w (who is doing what) df -h (disk usage info in human readable form) Unix commands \u00a7cut Cut out columns from a table … Continue reading