Sixth day _linux Basic command use method

Linux Format

command [parameters] [path file]

rm-rf/etc/passwd

# Linux/All directories are in the directory/below

# Wow path starting from the root directory

# called relative path starting at current position

Shortcut keys

Tab Completion command best hit two times Ctrl + C terminate foreground run program Ctrl+d exit Current Environment Ctrl + a jump to the front history view historical record! + History line number execute command! s command above the first letter

1,mkdir Creating a directory

2,ls View list file information

3,CD Switching directories

mkdir Create a file directory Linux Create folder

[[email protected] ~]# mkdir/data/#可以同时当前目录创建多个 [[email protected] ~]# mkdir 1 2 3[[email protected] ~]# LS1 2 3 Anacon Da-ks.cfg Install.log install.log.syslog#-p recursive creation [[email protected] ~]# mkdir-p/data/www/log[[email protected] ~]# ll/ data/www/log/-ddrwxr-xr-x. 2 root root 4096 Jan 1 19:02/data/www/log/

LS View list file

[[email protected] ~]# lsanaconda-ks.cfg install.log install.log.syslog#-l column form details [[email protected] ~]# ls-ltotal 40-r W-------. 1 root root 1069 Jan 1 03:25 anaconda-ks.cfg-rw-r--r--. 1 root root 23040 Jan 1 03:25 install.log-rw-r--r--. 1 root root 6240 Jan 1 03:24 install.log.syslog#-ld Show directory properties [[email protected] ~]# ls-ld/data/drwxr-xr-x. 2 root root 4096 Jan 1 18:58/data/[[email protected] ~]# lsanaconda-ks.cfg install.log install.log.syslog

CD Switch Directory

#pwd See the current decision path (where I am) [[email protected] ~]# cd/data/www/log/[[email protected] log]# PWD/DATA/WWW/LOG#CD. /switch to parent directory [[email protected] log]# CD. /[[email protected] www]# PWD/DATA/WWW#CD-Switch to the last directory [[email protected] www]# CD-/data/www/log[[email protected] log]# p WD/DATA/WWW/LOG#CD ~ Switch home directory [[email protected] log]# CD ~[[email protected] ~]# pwd/root

Touch Create text file

[[email protected] log]# Touch Aa.txt[[email protected] log]# lsaa.txt

VI Edit file (editor in Linux)

[[Email protected] log]# VI aa.txta or I start editing text q! Do not modify forced exit wq! Forced postponement

Cat View File Contents

[email protected] log]# cat Aa.txt AABBCC

echo Print Output command

> redirect the output from the front to the back will overwrite the information (empty the original content)

>> Append does not overwrite information

<< input information into the previous file

[[email protected] log]# echo aaaa[[email protected] log]# touch bb.txt# write bb.txt and overwrite all information inside [[Email bb.txt] Log ]# echo "Hell Bb.txt" > bb.txt [[email protected] log]# cat bb.txt hell bb.txt# append Hello bb.txt to bb.txt [email Protec Ted] log]# echo "Hello bb.txt" >> bb.txt [[email protected] log]# cat bb.txt Hell Bb.txthello bb.txt# There is also a way to write [[Emai L protected] log]# cat >> aa.txt <<EOF> aa> bb> cc> eof[[email protected] log]# cat Aa.txt AABBCC

CP Copy File

#拷贝1/cc.txt  to/data/www/log/[[email protected] ~]# cp 1/cc.txt /data/www/log/[[ Email protected] ~]# ll /data/www/log/total 8-rw-r--r--.  1 root root  11 jan  1 19:18 aa.txt-rw-r--r--.  1 root root 25 jan   1 19:15 bb.txt-rw-r--r--.  1 root root  0 jan  1  20:41 cc.txt# Copy Files directory   add r# copy 2 directories   under/data/www/log/[[EMAIL PROTECTED] ~]# CP  -r 2 /data/www/log/[[email protected] ~]# ll /data/www/log/total  12drwxr-xr-x. 2 root root 4096 jan  1 20:41 2-rw-r--r--.  1  root root   11 jan  1 19:18 aa.txt-rw-r--r--.  1  Root root   25 jan  1 19:15 bb.txt-rw-r--r--.  1 root  root   &nBsp;0 jan  1 20:41 cc.txt 

MV moving files or files directory

[Email protected] log]# LS2 aa.txt bb.txt cc.txt[[email protected] log]# mv *.txt./2/[[email protected] log]# ll 2/to Tal 8-rw-r--r--. 1 root root Jan 1 19:18 aa.txt-rw-r--r--. 1 root root Jan 1 19:15 bb.txt-rw-r--r--. 1 root root 0 Jan 1 20:41 cc.txt-rw-r--r--. 1 root root 0 Jan 1 20:41 dd.txt

RM Delete command-RF do not prompt to delete all

[[email protected] log]# ls2[[email protected] log]# rm-rf 2[[email protected] log]# Ls[[email protected] log]#

grep filtering

[email protected] log]# cat aa.txt 112233[[email protected] log]# cat Aa.txt | grep "11" 11

| The previous command output of the pipeline can be used for multiple | Pipelines in the back processing line

#排除11显示内容 [[email protected] log]# grep-v aa.txt 2233# display content by line [[email protected] log]# grep "one" Aa.txt 11

SED command

#过滤出来11 [[email protected] log]# sed-n/11/p aa.txt 11# except 11 all display [[email protected] log]# sed/^11/d aa.txt 2233

awk filtered out 11

[Email protected] log]# Awk/11/aa.txt 11

Head Display before tail display

Head-n aa.txt-n (number of rows) display the first few lines

Tail-n aa.txt-n (number of rows) shows the number of end lines

[[email protected] log]# seq >> aa.txt [[email protected] log]# head-3 aa.txt 123[[email protected] log]# Tai L-3 Aa.txt 9899100

To view the location of a command

[email protected] log]# which Cpalias cp= ' cp-i '/bin/cp[[email protected] log]#

View aliases

[[email protected] log]# which cpalias cp= ' CP  -i '         /bin/cp[[email protected] log]# alias  alias cp= ' cp -i ' alias l.= ' ls -d .* --color=auto ' alias ll= ' ls -l  --color=auto ' alias ls= ' ls --color=auto ' alias mv= ' mv -i ' alias rm= ' rm -i ' Alias which= ' alias | /usr/bin/which --tty-only --read-alias --show-dot -- Show-tilde ' [[email protected] log]# alias aa= ' echo  ' hello.com. ' [[Email protected] log]# aahello.com. [[email protected] log]# alias aa= ' cat  '/etc/sysconfig/network-scripts/ifcfg-eth0 '  [[email protected] log]# aa 

Device=eth0hwaddr=00:0c:29:5a:7e:03type=ethernetuuid=0a75fde7-0364-4b2c-bfa0-73c28aa36930onboot=yesnm_ Controlled=yesbootproto=dhcp

Unalias Canceling aliases

[[email protected] log]# unalias aa[[email protected] log]# Aa-bash:aa:command not found

All of these are temporary. Modify the configuration file for permanent entry

[[email protected] log]# Cat ~/.BASHRC #. bashrc# User specific aliases and Functionsalias rm= ' rm-i ' Alias cp= ' Cp-i ' Alias mv= ' mv-i ' # Source global definitionsif [-F/ETC/BASHRC]; Then. /etc/bashrcfi

Find File

[[email protected] log]# Find/-type f-name "Cat"/bin/cat

Find a file to delete

Find/-type F-name "Cat"-exec rm-rf {}\;find/root/-type f-name "*.log"-mtime-5 rm-rf {}\; #查找 root modified log all deleted in 5 days Except

SEQ Command

#输出 1-2[[email protected] log]# seq 212# output 5-8[[email protected] log]# seq 5 85678# Line show 1+2+3+4+5[[email protected] log]# s Eq-s "+" 51+2+3+4+5# display data upside down [[email protected] log]# SEQ 1 5 | tac54321

View 30-35 Head Tail method

[Email protected] log]# head-35 aa.txt | tail-6303132333435

Show 20-30 lines sed awk method

[[email protected] log]# sed-n 30,35p aa.txt 303132333435[[email protected] log]# awk ' {if (nr>29&&nr< () print $} ' aa.txt 303132333435NR rows to show row count

View the last five elements of/etc/passwd first column

[[email protected] log]# awk-f ":" ' {print $} '/etc/passwd | Tail-5saslauthpostfixsshdtcpdumpoprofile[[email protected] log]#

SED Replace command

[[email protected] log]# echo "Linux" >> bb.txt [[email protected] log]# cat bb.txt Linux put bb.txt file l Inux change to Windows[[email protected] log]# sed-i s#linux#windows#g bb.txt [[email protected] log]# cat Bb.txt windows[[email p Rotected] log]#

Change windows for all bb.txt files to Linux

[[email protected] log]# Find/-type f-name "Bb.txt"/data/www/log/bb/bb.txt/data/www/log/bb.txt[[email protected] log] # Find/-type f-name "Bb.txt" | Xargs sed-i s#windows#linux#g[[email protected] log]# Find/-type f-name "Bb.txt" | Xargs Cat Linuxlinux

Xargs the output (FIND/LS) to the back to perform the SEQ print digit echo {1. 5}{} with echo print sequence man view command how-to help

Author Personal blog: www.021soso.com

Baidu Cloud Disk Search: http://pan.yunpanos.com (Always use the search video tutorial site, so recommend to everyone)

This article is from the "Good Note ops" blog, please be sure to keep this source http://021soso.blog.51cto.com/11045979/1730639

Sixth day _linux Basic command use method