uname -a
lsb_release -d
cat /proc/meminfo
cat /proc/cpuinfo
df -h
fdisk -l
hdparm -i /dev/device (for example sda1, hda3...)
alt-F2 launches application make Caps Lock key another ctrl key System->Preferences->Keyboard Layouts Options "Ctrl Key position"
sudo apt-get install
git
hg
emacs
maven2
openjdk-6-jdk
dropbox*
google-chrome-stable*
tree
vim
need to add repo dropbox: http://www.dropbox.com/downloading?os=lnx chrome: http://www.google.com/linuxrepositories/
Prt Scrn - take a screenshot of the desktop.
Alt + Prt Scrn - take a screenshot of a window.
Shift + Prt Scrn - take a screenshot of an area you select.
screen
screen rejoin
screen -r
create new screen
Ctrl-a c
toggle next screen
Ctrl-a n
screenrc
echo "escape ^]]" > .screenrc
ping localhost at interval of 10 sec
ping -i 10 localhost
locate
sudo updatedb
locate foo
bring up terminal [Ctrl-Alt-F1..F8 switch between terminals]
Ctrl-Alt-F2 -
restart Gnome display manager
sudo /etc/init.d/gdm restart
ubuntu restart session (recover from crash)
C-A-Backspace
install xmonad (sudo apt-get install xmonad) Create
/usr/share/xsessions/xmonad-gnome-session.desktop
/usr/share/gnome-session/sessions/xmonad.session
/usr/share/applications/xmonad.desktop (maybe?)
trayer --edge top --align right --SetDockType true --SetPartialStrut false --expand true --width 5 --transparent true --tint 0x0000000 --height 18 --alpha 0 &
Dropbox git remote steps: http://stackoverflow.com/questions/1960799/using-gitdropbox-together-effectively
cd ~/Dropbox/git
git init --bare foo.git
cd ~/foo
git remote add origin ~/Dropbox/git/foo.git
git push -u origin master
upgrading to emacs 24, building from source (clone from github, cd into directory, then)
sudo apt-get install autoconf automake
./autogen.sh
sudo apt-get install texinfo libgtk3-dev libgif-dev libjpeg-dev libtiff-dev libxpm-dev libtinfo-dev
./configure --with-x-toolkit=gtk
make
src/emacs -Q <-- test
sudo make install
terminal only (amazon aws microinstance):
sudo apt-get install texinfo libtinfo-dev ncurses-dev
./configure --without-x
Wed 1/23/2013 Use different JDK: edit ~/.bashrc, set $JDK_HOME e.g.
export JDK_HOME=/home/scott/sandbox/sunjdk-7/jdk1.7.0
export JDK_HOME=/usr/lib/jvm/java-7-openjdk
set java in path
ln -s /usr/lib/jvm/java-7-openjdk/jre/bin/java ~/bin/java
relaunch shell
bash
truncate long lines in a tail tail spyder.log | cut -b 1-80
grep -r -B 1 -A 80 something.something logs/spyder.log
tar -czf foo.tar.gz bar/
grep tricks
grep -r -B 1 -A 80 something.something logs/spyder.log
grep -Fx "a whole line" file.log
grep yadda yadda yadda | sort | uniq
grep yadda yadda yadda | cut -b 1-10
append to file
>>
Sys admin tools: top, htop, w, iostat, nmap, du
create .tar.gz (gzipped) file of director(ies): tar -czvf archive.tar.gz foo/ bar/ extract tar tar -xzvf archive.tar.gz
port forwarding script:
#!/bin/sh
HOST=ec2-107-21-140-138.compute-1.amazonaws.com
exec ssh -i ~/dev/revelytix-spyder/spyder-testing.pem -o ServerAliveInterval=10 ubuntu@$HOST -L 3360:localhost:3306
update ubuntu JDK:
sudo update-alternatives --config java ;; don't do this, do below instead
http://askubuntu.com/questions/141791/is-there-a-way-to-update-all-java-related-alternatives
update-alternatives --get-selections | grep java
/usr/sbin/update-java-alternatives -l
sudo apt-get install icedtea-7-plugin
sudo /usr/sbin/update-java-alternatives -s java-1.7.0-openjdk-amd64
3/26/13
/etc/resolv.conf
# OpenDNS
nameserver 208.67.222.222
nameserver 208.67.220.220
4/1/13
DON'T hand-edit /etc/resolv.conf
nslookup www.example.com
sudo resolvconf-u
sudo service network-manager restart
sudo poweroff
sudo reboot
go back to login screen
alt + shift + q
apt (Advanced Packaging Tool package manager) notes
check package 'foo' availablility
update, upgrade
sudo apt-get update
sudo apt-get upgrade --dry-run
sudo apt-get dist-upgrade
search
apt-cache showpkg foo
apt-cache search foo
see files installed for a package 'foo'
dpkg-query -L foo
find what process is using a port (precede all with sudo)
netstat -tulpn | grep 80
ls -l /proc/<pid>/exe
fuser 80/tcp
cp Music -> Important diff and cp commands:
diff -qr temp1/ temp2/
cp -nRv temp1/ temp2/ > report.txt
but instead of temp2, target directory is:
/Volumes/Important/Music/ALL/
update default editor
sudo update-alternatives --config editor
Guide to CLI package managers: apt, yum, zypper
Package managers per dist
| dist | manager | format |
|---|---|---|
| Ubuntu | apt | deb |
| RHEL | yum | rpm |
| centos | " | " |
| SUSE |
Note: repoquery is a yum util:
yum install yum-utils
See installed repos:
apt-cache policy |grep http |awk '{print $2 $3}' |sort -u
/etc/apt/sources.list, sources.list.d/
yum repolist
/etc/yum.repos.d/
zypper lr [-d] [-u]
Add repo (for apt-add-repository debian requires software-properties-common or python-software-properties):
apt-add-repository url
curl http://repo.url/foo.repo | sudo tee /etc/yum.repos.d/foo.repo > /dev/null
sudo wget http://repos.fedorapeople.org/repos/dchen/apache-maven/epel-apache-maven.repo \
-O /etc/yum.repos.d/epel-apache-maven.repo
zypper ar -f url
remove repo:
apt-add-repository -r url
update|refresh installed repos:
apt-get update
zypper refresh
upgrade
apt-get [upgrade [--dry-run]|dist-upgrade]
Search for package:
apt-cache search expr
yum search expr
zypper search expr
Search for installed package:
apt-cache policy [pkgname]
dpkg-query -l [expr]
yum list installed pkg
zypper search --installed pkg
See package details:
apt-cache showpkg pkg
yum info pkg
zypper info pkg
See all available versions of a package
apt-cache madison pkg
yum --showduplicates list pkg | expand
(madison? 🤷)
Install package:
apt-get install pkg
yum install pkg
zypper install pkg
Install package non-interactive:
apt-get
yum
zypper install --non-interactive pkg
See package dependencies|requirements:
apt-cache depends pkg
repoquery --requires pkg
zypper
Remove package:
apt-get purge
yum remove pkg
zypper
See package installed contents:
dpkg-query -L pkg
repoquery --list pkg
zypper
create new repo out of directory containing .rpm's
zypper ar -t plaindir -n "My local directory of RPM's" /opt/foo/rpm "my-foo"