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22
cheat/cheatsheets/cups
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22
cheat/cheatsheets/cups
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# Manage printers through CUPS:
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http://localhost:631 (in web browser)
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# Print file from command line
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lp myfile.txt
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# Display print queue
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lpq
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# Remove print job from queue
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lprm 545
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or
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lprm -
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# Print log location
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/var/log/cups
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# Reject new jobs
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cupsreject printername
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# Accept new jobs
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cupsaccept printername
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32
cheat/cheatsheets/hardware-info
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32
cheat/cheatsheets/hardware-info
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# Display all hardware details
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sudo lshw
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# List currently loaded kernel modules
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lsmod
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# List all modules available to the system
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find /lib/modules/$(uname -r) -type f -iname "*.ko"
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# Load a module into kernel
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modprobe modulename
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# Remove a module from kernel
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modprobe -r modulename
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# List devices connected via pci bus
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lspci
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# Debug output for pci devices (hex)
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lspci -vvxxx
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# Display cpu hardware stats
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cat /proc/cpuinfo
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# Display memory hardware stats
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cat /proc/meminfo
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# Output the kernel ring buffer
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dmesg
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# Ouput kernel messages
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dmesg --kernel
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23
cheat/cheatsheets/lib
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23
cheat/cheatsheets/lib
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@ -0,0 +1,23 @@
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# Display available libraries
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ldconfig -p
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# Update library resources
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ldconfig
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# Display libraries and file location
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ldd
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# Libraries available to apps in real-time
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"Dynamic Libraries" (.so.)
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# Libraries only available to apps when installed (imported)
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"Static Libraries" (.a.)
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# Standard (usual) library file location
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/lib
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# Sofware-accessible source for library info
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/etc/ld.so.cache # (binary)
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# Human-readable source for library info
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/etc/ld.so.conf # (points to /etc/ld.so.conf.d)
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33
cheat/cheatsheets/ntp
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33
cheat/cheatsheets/ntp
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@ -0,0 +1,33 @@
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# Verify ntpd running:
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service ntp status
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# Start ntpd if not running:
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service ntp start
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# Display current hardware clock value:
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sudo hwclock -r
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# Apply system time to hardware time:
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sudo hwclock --systohc
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# Apply hardware time to system time:
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sudo hwclock --hctosys
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# Set hwclock to local time:
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sudo hwclock --localtime
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# Set hwclock to UTC:
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sudo hwclock --utc
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# Set hwclock manually:
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sudo hwclock --set --date="8/10/15 13:10:05"
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# Query surrounding stratum time servers
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ntpq -pn
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# Config file:
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/etc/ntp.conf
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# Driftfile:
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location of "drift" of your system clock compared to ntp servers
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/var/lib/ntp/ntp.drift
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5
cheat/cheatsheets/ping
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5
cheat/cheatsheets/ping
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# ping a host with a total count of 15 packets overall.
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ping -c 15 www.example.com
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# ping a host with a total count of 15 packets overall, one every .5 seconds (faster ping).
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ping -c 15 -i .5 www.example.com
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@ -4,6 +4,9 @@ rpm -ivh <rpm>
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# To remove a package:
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# To remove a package:
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rpm -e <package>
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rpm -e <package>
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# To remove a package, but not its dependencies
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rpm -e --nodeps <package>
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# To find what package installs a file:
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# To find what package installs a file:
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rpm -qf </path/to/file>
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rpm -qf </path/to/file>
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@ -17,3 +20,12 @@ rpm -q --whatrequires <file>
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# To list all installed packages:
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# To list all installed packages:
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rpm -qa
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rpm -qa
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# To find a pkg's dependencies
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rpm -i --test <package>
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# Display checksum against source
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rpm -K <package>
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# Verify a package
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rpm -V <package>
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21
cheat/cheatsheets/rss2email
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21
cheat/cheatsheets/rss2email
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'rss2email -- converts rss feeds and emails them to your inbox'
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# List all feeds
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r2e list
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# Convert RSS entries to email
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r2e run
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# Add a new feed
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r2e add <feed address>
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# Add a new feed with new email address
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r2e add <feed address> [newemail address]
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# Delete a feed
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r2e delete <# of feed in list/>
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# Help
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r2e -h
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18
cheat/cheatsheets/systemd
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18
cheat/cheatsheets/systemd
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# Display process startup time
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systemd-analyze
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# Display process startup time at service level
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systemd-analyze blame
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# List running units
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systemctl list-units
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# Load a unit at startup
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systemctl enable foo.service
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# Start or Stop a unit
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systemctl <start | stop> foo.service
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# Unit file locations
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/etc/systemd/system
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/usr/lib/systemd/system
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