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Linux command
Linux
- 1991 Linus Torvalds
- mimic of Unix
- for pc
Basic commands
| basic commands | mac | windows |
|---|---|---|
| change directory | cd |
cd |
| current directory | pwd |
cd |
| list files | ls, ll |
dir |
| list files info | ls -l |
dir |
| view file content | cat filename |
type filename |
| open site | open http://www.naver.com |
explorer http://www.naver.com |
| edit file | nano filename |
notepad filename |
File extract 1 line
sed -n '3p' file
# Here's another:
head -n 3 file | tail -n 1
File Encoding
- 확인
file -bi filename
File opened count
lsof | wc -l
inode file rm (too long file name)
ls -il
find . -inum 782263 -exec rm -i {} \;
nobody 소유의 폴더 찾기
find . -type d -user nobody
심볼릭 링크 찾기
find . -type l
Port check
lsof -t -i:3000# pidlsof -i tcp:3000# process열린 포트 확인
lsof -i -nP | grep LISTEN | awk '{print $(NF-1)" "$1}' | sort -u
*:27017 mongod
*:8082 node
- 원격 열린 포트 확인
# dest
nc -l -p 7555 > myfile.txt
# mac
nc -l 7555 > myfile.txt
# source
nc 172.31.95.135 7555 < myfile.txt
LC_CTYPE warning
- /etc/environment
LANG=en_US.utf-8
LC_ALL=en_US.utf-8
change file encoding
iconv -f euc-kr -t utf-8 kimchi.txt > kimchi_utf8.txt
multi files
mkdir utf8
for file in *.csv; do
iconv -f euc-kr -t utf-8 "$file" > "utf8/${file%.csv}.utf8.csv"
done
date
date '+%Y%m%d %H%M%S' # today
date -v-3d '+%Y%m%d %H%M%S' # 1 days before
# or
date -d "3days ago" '+%Y-%m-%d %H' # bash
Timezone
- ~/.bash_profile
# .bash_profile
export TZ='Asia/Seoul';
- for cron
sudo cp -p /usr/share/zoneinfo/Asia/Seoul /etc/localtime
sudo service crond restart
sudo
vi /etc/sudoers
## Allows people in group wheel to run all commands
# %wheel ALL=(ALL) ALL
%dev ALL=(ALL) ALL
VGA 확인
sudo dnf install pciutils
lspci | grep -i vga
file filter
find . -type f | egrep "gif$|jpg$|jpeg$|svg$|png$|webp__html__quot; | wc -l
archive filtered list containing spaces in file name
find . -type f | grep -v list_files |egrep "php$|html$|htm$|js$|css$|inc__html__quot; > list.txt
tar cvfz text.tgz -T list.txt
find . -type f | grep -v list_files |egrep "gif$|jpg$|jpeg$|svg$|png$|ico__html__quot; > list_img.txt
tar cvfz img.tgz -T list_img.txt
find and remove
find . -name .DS_Store | xargs rm
# to handle spaces in filenames
find . -name .DS_Store -print0 | xargs -0 rm
Process 확인
ps -ef | grep httpd
ps x -o "%p %r %c"
- group process kill
ps -ef | grep httpd
kill -TERM -- -22590
- process id
pgrep -f java
htop
sudo dnf -y install htop
htop
htop -p "$(pgrep -vfd, 'java|python')"
dust
wget https://github.com/bootandy/dust/releases/download/v1.1.1/dust-v1.1.1-x86_64-unknown-linux-gnu.tar.gz
tar xvfz dust-v1.1.1-x86_64-unknown-linux-gnu.tar.gz
sudo mv dust-v1.1.1-x86_64-unknown-linux-gnu/dust /usr/local/bin
rm -rf dust-v1.1.1-x86_64-unknown-linux-gnu*
sudo dust /
dust -h
ls for second
ls -la --time-style=full-iso
sendmail
sudo dnf install sendmail -y
echo -e "Subject: Terminal Email Send\n\nEmail Content line 1\nEmail Content line 2" > content
sendmail recipient@example.com < content
mutt
- 파일첨부
mutt -s "subject" -i body.txt -a attachment.txt recipient@example.com
mail -s "This is the subject" kenu.heo@gmail.com <<< 'This is the message'
other topics
ref
- vi 에디터에서 utf8, euc-kr 전환하기
- Linux file descriptors
- Mutt
- Send mail from linux command line
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