2018년 10월 31일 (수) 17:47 기준 최신판

`-bash: warning: setlocale: LC_ALL: cannot change locale (ko_KR.UTF-8)`

sudo vim /etc/locale.gen # uncomment ko_KR.UTF-8 line.
sudo locale-gen 
# logout and re-login

한글 나오게 하기

.bashrc에 export LANG=ko_KR.UTF-8

X에 한글글꼴이 없을 수 있음. 그러면 윈도우에 글꼴 몇개 가져다가/usr/share/fonts/ms/에 넣고

# cd /usr/share/fonts/ms
# mkfontscale
# ttmkfdir
# fc-cache
# chmod -R a+r /usr/share/fonts/msfont

이렇게 하면 됨. 글꼴파일 이름이 한글이어도 정상동작했고 firefox에서 자동으로 인식했음. 터미널에는 글꼴 없어도 export LANG만 가지고도 됨.여기참고했음. 나는 fonts.dir, fonts.cache-1같은것이 생기지 않았기 때문에 저 중에 무언가를 빼도 될것같기도 함.

gcc설치

yum groupinstall 'Development Tools'

selinux

see /etc/sysconfig/iptables (if you cannot access port 80 at remote place)
1. Modify that file or
2. Use the system-config-firewall command
3. if this is not a problem, see this CentOS wiki page
  - semanage port -a -t http_port_t -p tcp 81
Use setenforce command instead of echo 0 > /selinux/enforce (Because just simple. no other reasons)
ls -Z
ps -ZC httpd
- or ps -eZ

Base64 decode to file

perl -MMIME::Base64 -ne 'print decode_base64($_)' < file.txt > out

http://wvarner.blogspot.com/2008/06/base64-decode-to-file.html

core file

cat /proc/sys/kernel/core_pattern

https://superuser.com/questions/849099/where-does-ubuntu-14-04-drop-core-files

network issues

gateway ip

 $ route -n
 $ netstat -r -n
 $ ip route show

gateway가 아예 안나올 때(via ~가 보이지 않는다거나 route에서 gateway가 *.*.*.*)가 있던데 이건 어떤 경우인지 모르겠다.
www.cyberciti.biz

`ip route` examples

 ip route add 192.168.1.0/24 dev eth0
 ip route add default via 192.168.1.254
 ip route delete 192.168.1.0/24 dev eth0

www.cyberciti.biz

ip collision detect : `arp-scan`

$ sudo apt-get install arp-scan
$ arp-scan -I eth0 -l | grep 192.168.1.42
 192.168.1.42 d4:eb:9a:f2:11:a1 (Unknown)
 192.168.1.42 f4:23:a4:38:b5:76 (Unknown) (DUP: 2)

askubuntu.com

When `ifdown` is not working

$ sudo ifconfig eth0 down

http://unix.stackexchange.com/a/50604/31363

flushing interface

ip addr flush dev enp2s0

http://askubuntu.com/a/875180/400331

Set DNS manually

/etc/resolvconf/resolv.conf.d/base

nameserver 8.8.8.8
nameserver 8.8.4.4

sudo resolvconf -u

askubuntu.com

add static routes in Ubuntu

# vi /etc/network/interfaces
...
up ip route add 192.168.0.0/24

https://askubuntu.com/a/168037/400331

Flushing dhcp

dhclient -r

https://askubuntu.com/q/151958/400331

network configuration examples (ubuntu)

help.ubuntu.com

Setting/changing the hostname
Finding your network interface
Disable network managers and/or wicd
Configuring an interface
Setting up a second IP address or Virtual IP address
Howto set MTU for a connection
Setting up DNS
Wireless

etc

ssh

ssh alias

edit ~/.ssh/config

Host myremote             # any name for the host
HostName 192.168.178.05   # IP, .local, or hostname if defined
User username             # your username
Port 22                   # port to listen

and then, ssh myremote
http://askubuntu.com/questions/257472/host-alias-for-ssh askubuntu.com

sshd restart

# sudo service ssh restart

or

# /etc/init.d/ssh restart

https://www.cyberciti.biz/faq/howto-restart-ssh/

centos 7 sshd service not found

systemctl enable sshd.service
systemctl start sshd.service
systemctl status sshd.service

https://www.digitalocean.com/community/questions/centos-7-sshd-service-not-found

kill x-server (stop lightdm)

ctrl + alt + F1 : to switch terminal. cf) ctrl+alt+F7 to switch x-window

sudo service lightdm stop

or

sudo /etc/init.d/lightdm stop 
# or 
sudo service lightdm stop
# lightdm can be known by this.
cat /etc/X11/default-display-manager

askubuntu.com askubuntu.com askubuntu.com

“Required key not available” when install 3rd party kernel modules

or after a kernel upgrade.
To resolve this, disable Secure Boot in UEFI(BIOS) settings.
askubuntu.com

my Ubuntu version

lsb_release -a

help.ubuntu.com

symbolic link의 chown

-h 옵션을 같이 쓸 것. no dereference option.

https://superuser.com/a/68688

sudo without password

sudo visudo

In the bottom of the file, type the follow:

username ALL=(ALL) NOPASSWD: ALL

https://askubuntu.com/a/147265/400331

Upgrade single package

apt-get install --only-upgrade <packagename>

https://askubuntu.com/a/44124/400331

boot partition full

먼저, 쓸데없이 설치되어 있는 커널 찾아본다.

sudo dpkg --list 'linux-image*' | grep ^ii | awk '{print $2}' | sort | egrep "[0-9]-generic" | head -n -3

(여기의 세번째 댓글이 출처)
내 현재 커널과(uname -r)상관 없으면 다 쓸데없는 커널이미지.

그 다음, 지운다. 잘 안되면, 강제로 한다.

sudo dpkg --remove --force-remove-reinstreq <packagename>

[1]
dependency가 있으면 어떤 패키지부터 지우라고 알려준다. 현재 커널과 상관없으면 다 지워도 된다.

기도하면서 재부팅.

temporary ssh/rsync server

가장 쉬운 방법은, 한쪽에서

/sbin/sshd -p 6789

하고, 다른쪽에서 그 포트로 접속하는 것. rsync도 해당 포트를 이용해서 하는 것이 가장 빠르다.

rsync -e 'ssh -P 6789' user@1.2.3.4:path/to

How to Rsync with non-standard SSH Port

ssh ternnel

터널링에 관한 자료들

discussion

blog comments powered by Disqus

@@ 1번째 줄: / 1번째 줄: @@
+=== <code>-bash: warning: setlocale: LC_ALL: cannot change locale (ko_KR.UTF-8)</code> ===
+ sudo vim /etc/locale.gen # uncomment ko_KR.UTF-8 line.
+ sudo locale-gen
+ # logout and re-login
 === 한글 나오게 하기 ===
@@ 8번째 줄: / 13번째 줄: @@
 # fc-cache
 # chmod -R a+r /usr/share/fonts/msfont</source> 이렇게 하면 됨. 글꼴파일 이름이 한글이어도 정상동작했고 firefox에서 자동으로 인식했음. 터미널에는 글꼴 없어도 export LANG만 가지고도 됨.[http://blog.nice2seeyou.com/mike/tag/%ED%95%9C%EA%B8%80%ED%8F%B0%ED%8A%B8 여기]참고했음. 나는 fonts.dir, fonts.cache-1같은것이 생기지 않았기 때문에 저 중에 무언가를 빼도 될것같기도 함.
 === gcc설치 ===
@@ 29번째 줄: / 32번째 줄: @@
-===unix time conversion ===
+==Base64 decode to file==
-<code># date -d @1187769064</code>
+<pre>perl -MMIME::Base64 -ne 'print decode_base64($_)' < file.txt > out</pre>
+http://wvarner.blogspot.com/2008/06/base64-decode-to-file.html
-===Base64 decode to file===
-<code>perl -MMIME::Base64 -ne 'print decode_base64($_)' < file.txt > out</code>
-<br>([http://wvarner.blogspot.com/2008/06/base64-decode-to-file.html FROM])
-===core file===
-<code>cat /proc/sys/kernel/core_pattern</code><br>
-[https://superuser.com/questions/849099/where-does-ubuntu-14-04-drop-core-files superuser.com]
+==core file==
+ cat /proc/sys/kernel/core_pattern
+https://superuser.com/questions/849099/where-does-ubuntu-14-04-drop-core-files
+==network issues==
 ===gateway ip===
@@ 52번째 줄: / 48번째 줄: @@
 gateway가 아예 안나올 때(via ~가 보이지 않는다거나 route에서 gateway가 *.*.*.*)가 있던데 이건 어떤 경우인지 모르겠다.<br>
 [https://www.cyberciti.biz/faq/how-to-find-gateway-ip-address/ www.cyberciti.biz]
 ===<code>ip route</code> examples===
@@ 60번째 줄: / 54번째 줄: @@
   ip route delete 192.168.1.0/24 dev eth0</pre>
 [https://www.cyberciti.biz/faq/howto-linux-configuring-default-route-with-ipcommand/ www.cyberciti.biz]
 ===ip collision detect : <code>arp-scan</code>===
@@ 70번째 줄: / 62번째 줄: @@
 [http://askubuntu.com/questions/30080/how-to-solve-connection-refused-errors-in-ssh-connection/141415#141415 askubuntu.com]
+===When <code>ifdown</code> is not working===
+ $ sudo ifconfig eth0 down
+http://unix.stackexchange.com/a/50604/31363
+===flushing interface===
+ ip addr flush dev enp2s0
+http://askubuntu.com/a/875180/400331
+===Set DNS manually===
+<pre>/etc/resolvconf/resolv.conf.d/base</pre>
+<pre>nameserver 8.8.8.8
+nameserver 8.8.4.4</pre>
+<pre>sudo resolvconf -u</pre>
+[https://askubuntu.com/a/662865 askubuntu.com]
+===add static routes in Ubuntu===
+ # vi /etc/network/interfaces
+ ...
+ up ip route add 192.168.0.0/24
+https://askubuntu.com/a/168037/400331
+===Flushing dhcp===
+ dhclient -r
+https://askubuntu.com/q/151958/400331
+===network configuration examples (ubuntu)===
+[https://help.ubuntu.com/community/NetworkConfigurationCommandLine/Automatic help.ubuntu.com]
+* Setting/changing the hostname
+* Finding your network interface
+* Disable network managers and/or wicd
+* Configuring an interface
+* Setting up a second IP address or Virtual IP address
+* Howto set MTU for a connection
+* Setting up DNS
+* Wireless
+etc
+==ssh==
 ===ssh alias===
 edit <code>~/.ssh/config</code>
@@ 80번째 줄: / 108번째 줄: @@
 and then,
 <code>ssh myremote</code><br>
-[http://askubuntu.com/questions/257472/host-alias-for-ssh askubuntu.com]
+http://askubuntu.com/questions/257472/host-alias-for-ssh askubuntu.com
+===sshd restart===
+ # sudo service ssh restart
+or
+ # /etc/init.d/ssh restart
+https://www.cyberciti.biz/faq/howto-restart-ssh/
+===centos 7 sshd service not found===
+ systemctl enable sshd.service
+ systemctl start sshd.service
+ systemctl status sshd.service
+https://www.digitalocean.com/community/questions/centos-7-sshd-service-not-found
-===kill x-server (stop lightdm)===
+==kill x-server (stop lightdm)==
 ctrl + alt + F1 : to switch terminal.
 cf) ctrl+alt+F7 to switch x-window
@@ 96번째 줄: / 134번째 줄: @@
 [http://askubuntu.com/a/320670 askubuntu.com] [http://askubuntu.com/a/295786 askubuntu.com][http://askubuntu.com/a/1222 askubuntu.com]
+==“Required key not available” when install 3rd party kernel modules==
-===“Required key not available” when install 3rd party kernel modules===
 or after a kernel upgrade.<br>
 To resolve this, disable Secure Boot in UEFI(BIOS) settings.
 <br>[http://askubuntu.com/a/762255 askubuntu.com]
+==my Ubuntu version==
+<pre>lsb_release -a</pre>
+[https://help.ubuntu.com/community/CheckingYourUbuntuVersion help.ubuntu.com]
+==symbolic link의 chown==
+<code>-h</code> 옵션을 같이 쓸 것. no dereference option.
+https://superuser.com/a/68688
+==sudo without password==
+ sudo visudo
+In the bottom of the file, type the follow:
+ username ALL=(ALL) NOPASSWD: ALL
+https://askubuntu.com/a/147265/400331
+==Upgrade single package==
+ apt-get install --only-upgrade <packagename>
+https://askubuntu.com/a/44124/400331
+==boot partition full==
+먼저, 쓸데없이 설치되어 있는 커널 찾아본다.
+ <nowiki>sudo dpkg --list 'linux-image*' | grep ^ii | awk '{print $2}' | sort | egrep "[0-9]-generic" | head -n -3</nowiki>
+([https://askubuntu.com/a/345611 여기]의 세번째 댓글이 출처)<br>
+내 현재 커널과(<c>uname -r</c>)상관 없으면 다 쓸데없는 커널이미지.
+그 다음, 지운다. 잘 안되면, 강제로 한다.
+ sudo dpkg --remove --force-remove-reinstreq <packagename>
+[https://askubuntu.com/a/751580/400331]<br>
+dependency가 있으면 어떤 패키지부터 지우라고 알려준다. 현재 커널과 상관없으면 다 지워도 된다.
+기도하면서 재부팅.
-===my Ubuntu version===
-<pre>lsb_release -a</pre>
-[https://help.ubuntu.com/community/CheckingYourUbuntuVersion help.ubuntu.com]
-===When `ifdown` is not working===
+=temporary ssh/rsync server=
- $ sudo ifconfig eth0 down
+<p>가장 쉬운 방법은, 한쪽에서</p>
-http://unix.stackexchange.com/a/50604/31363
+<p><code>/sbin/sshd -p 6789</code></p>
-{{break}}
+<p>하고, 다른쪽에서 그 포트로 접속하는 것.
+rsync도 해당 포트를 이용해서 하는 것이 가장 빠르다.</p>
+<p><code>rsync -e &#39;ssh -P 6789&#39; user@1.2.3.4:path/to</code></p>
+[https://www.tecmint.com/sync-files-using-rsync-with-non-standard-ssh-port/ How to Rsync with non-standard SSH Port]
-==a==
+=ssh ternnel=
+<p>터널링에 관한 자료들</p>
+<ul>
+<li>[https://blog.trackets.com/2014/05/17/ssh-tunnel-local-and-remote-port-forwarding-explained-with-examples.html Local and Remote Port Forwarding Explained With Examples]</li>
+<li>[https://serverfault.com/questions/337274/ssh-from-a-through-b-to-c-using-private-key-on-b SSH from A through B to C, using private key on B]</li>
+<li>[https://www.techrepublic.com/article/how-to-use-local-and-remote-ssh-port-forwarding/ How to use local and remote SSH port forwarding]
+</ul>
+<p>&nbsp;</p>
 ==discussion==
 <disqus></disqus>

둘러보기 메뉴

"Linux"의 두 판 사이의 차이

2018년 10월 31일 (수) 17:47 기준 최신판

목차

`-bash: warning: setlocale: LC_ALL: cannot change locale (ko_KR.UTF-8)`

한글 나오게 하기

gcc설치

selinux

Base64 decode to file

core file

network issues

gateway ip

`ip route` examples

ip collision detect : `arp-scan`

When `ifdown` is not working

flushing interface

Set DNS manually

add static routes in Ubuntu

Flushing dhcp

network configuration examples (ubuntu)

ssh

ssh alias

sshd restart

centos 7 sshd service not found

kill x-server (stop lightdm)

“Required key not available” when install 3rd party kernel modules

my Ubuntu version

symbolic link의 chown

sudo without password

Upgrade single package

boot partition full

temporary ssh/rsync server

ssh ternnel

discussion

"Linux"의 두 판 사이의 차이

2018년 10월 31일 (수) 17:47 기준 최신판

목차

-bash: warning: setlocale: LC_ALL: cannot change locale (ko_KR.UTF-8)

한글 나오게 하기

gcc설치

selinux

Base64 decode to file

core file

network issues

gateway ip

ip route examples

ip collision detect : arp-scan

When ifdown is not working

flushing interface

Set DNS manually

add static routes in Ubuntu

Flushing dhcp

network configuration examples (ubuntu)

ssh

ssh alias

sshd restart

centos 7 sshd service not found

kill x-server (stop lightdm)

“Required key not available” when install 3rd party kernel modules

my Ubuntu version

symbolic link의 chown

sudo without password

Upgrade single package

boot partition full

temporary ssh/rsync server

ssh ternnel

discussion

`-bash: warning: setlocale: LC_ALL: cannot change locale (ko_KR.UTF-8)`

`ip route` examples

ip collision detect : `arp-scan`

When `ifdown` is not working