HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services|Dnscache\Parameters
DWORD:MaxCacheEntryTtlLimit
Value:14400 ---this is in seconds. 14400 is 4 hours.
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2009
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November
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- xsetroot -solid black
- rpm --checksig; rpm -K
- dhcpd.conf: shared-network {subnet {group { host }}}}
- ex: %d ---delete all lines in a file
- ex: 23,.m$ --move lines from 23 to the current lin...
- pinfo
- man -aw ls
- man -d ls
- when you get segmentation fault in yum: rm -f /var...
- xorg.conf is missing: Xorg -configure :1
- ex: := prints the total number of lines; :.= pri...
- ex: 1,10# --display lines 1 to 10 and their respec...
- for i in {0..110};do echo line $i;done
- `xmonad --recompile` ---same as alt-q when xmonad ...
- prevent overwrite of existing files: set -o noclob...
- dd if=8.0-RELEASE-amd64-memstick.img of=/dev/da0 b...
- tcpdump -i any
- fedora installation mounts: /mnt/sysimage; /mnt/is...
- nt: fsutil file createnew swap_device 536870912
- distro upgrade: apt-get dist-upgrade; fedora: preu...
- bash: repeat a command that contained foo ANYWHERE...
- .bashrc: HISTFILE="~/.bash_history; HISTSIZE=10000
- yum groupinstall "Moblin Desktop Environment"
- vim: "1pu.u.u.u
- winecfg; wine control; winefile; wine uninstaller;...
- ports: dhcpd listens on UDP:67 and answers using U...
- screen /dev/ttyS0
- use output of one command as an argument of anothe...
- reboot system every time user connects to the syst...
- yum install yum-presto
- grep 'a b' 44 ..
- open file on the last line: vim + /var/log/message...
- mysql_install_db --user=mysql; mysql_secure_instal...
- Things to take with when going out:
- chkconfig nscd on; nscd -i hosts; ipconfig /flushdns
- for i in {1..19}; do echo $i; done
- PS1="\u@\h:\w\$"
- query rpm with the specified m5sum: rpm --fileid n...
- output and error redirection: myprogram 1>messages...
- check the openssl on local port 995: openssl s_cli...
- view changes to default configuration: dovecot -n;...
- escape characters: ^] for telnet; ^A for GNU Scree...
- rpm --nomd5 --nopgp
- list package requerements: rpm -qR bash
- list only documentation files of a package: rpm -q...
- list only configuration files of a package: rpm -q...
- remove package: rpm -e glibc-devel
- force installation: rpm -i foo.rpm --nodeps
- freshen file (do not install if such package is no...
- install foreign package: alien -i package.rpm
- simulate package installation: apt-get -s; rpm --test
- download, but do not install: apt-get -d
- list all installed packages, or in the example onl...
- list files in a package: dpkg -L pkg_name
- gzip -dc tarball.tar.gz|tar -xv ---option -c of gz...
- mysql: /etc/my.cnf: skip-networking
- which package owns the file: rpm -qf /file ; pacma...
- ssh: ssh-copy-id user@target-machine
- C: .c -> preprocessing (including files, etc) .i -...
- vim: c/phrase_down_to_which_change ---combine sear...
- quota: apt-get install quota quotatool; vim /etc/f...
- asterisk: asterisk -cvvv ---if you don't have star...
- asterisk: asterisk -rvvv: module reload chan_sip; ...
- selinux: touch /.autorelabel;reboot --- if you can...
- yum grouplist; yum groupinfo "development tools"
- rpm: rpm --root root_directory -vv
- rpm: rpm --showrc; /usr/lib/rmp/rpmrc ---default g...
- selinux: setsebool -P allow_httpd_anon_write=1 ..
- selinux: selinux port -l
- selinux: semanage port -a -p udp -t ssh_port_t 115
- postmap /etc/aliases ---after editing the file
- postconf alias_maps
- getent passwd sergey; getent group wheel
- ssh-agent screen ; ssh-agent startx
- bash: eval `ssh-agent`
- awk 'END {print NR }' /etc/group ---shows the numb...
- awk -F: '{if ($4 && $4!=$1) print $1}' /etc/group
- bash: enable -a ---shows enables built-in commands...
- nt: ipconfig /displaydns |more ; ipconfig /flushdns
- hostapd.conf ..
- ifcfg-eth: ..
- dhclient.conf: send-hostname "sergey"
- slaptest
- openssl rsa -in slapd-key -pubout>slapd-key.out
- awk -F: '{print $1}' /etc/passwd ---the same as ...
- arptables, ebtables (for ethernet), iptables (for ...
- wireless bridge configuration: /etc/network/interf...
- ls -d .* ---list only hidden files
- ls -L ---show i on the linked file, rather than th...
- ls -1 ---show only 1 file per line
- ls -S ---sort by size
- ls -Q ---quote names (GNU extension);
- sed: sed '1 i this is first line' file ---adds lin...
- mysql postinstall: set password for root@localhost...
- mysql: select user,host from mysql.user;
- mysql: mysqladmin -u root shutdown
- slapd.conf: loglevel 296 --- -1 all loging informa...
- postfix: postconf -e "mynetworks = 192.168.1.0/24,...
- host -t mx mail.ru
- postfix: postconf -e "relayhost = mailhub.example....
- mutt: set folder="imaps://username@example.com" se...
- ssh: Host is anything and hostname is the real name
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November
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