OpsLinux

Most used Linux commands

CLI, Linux

Unzip bz2 keep the original file
bzip2 -dk filename.bz2

Find out the current Linux version
cat /etc/*-release

ssh-keygen -f id_rsa -p

Check hardware
lshw

Change java version
update-alternatives -config java

Change mode
chmod + xxx.sh

ls -lah
bzgrep / zgrep / grep “something” xxx.log | xmlprettify | less ( xmlbroswerfy > xxx.html)

zgrep RES xxxx.log | grep -v SUCCESS | less (what is grep -v)

tail -2 xxx.log | xmlprettify
cat xxx.log | xmlprettify

bring job to foreground
fg

put thread to background
bg

setup public key on server
cat ~/.ssh/id_rsa.pub | ssh user@hostname 'cat >> .ssh/authorized_keys'

find . -type f -name '*.bz2' -size +0c | while read line; do /bin/bzip2 -dc $line |/usr/bin/xz --best -c > "../xz/${line%.bz2}.xz"; cat /dev/null > $line ; done

zgrep something log_name | cut -d "/" -f 2-4 | sort | uniq

tar ????

$$ is the process ID (PID) of the script itself.

echo ${HOSTNAME%%.*} 两个百分号移除结尾的.后面的东西

“2> /dev/null” 代表忽略掉错误提示信息。

  • 0 – stdin
  • 1 – stdout
  • 2 – stderr

change onwership

1
sudo chown -R phillipxu: /usr/local/lib

cli

Share