分享平时工作中那些给力的shell命令(更新版)
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分享平时工作中那些给力的shell命令(更新版)
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分享平時工作中那些給力的shell命令(更新版)
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查看邏輯cpu個數:cat /proc/cpuinfo | grep “processor” | wc -l
查看物理cpu個數:cat /proc/cpuinfo | grep “physical id” | sort | uniq | wc -l
查看每個物理cpu的核數cores:cat /proc/cpuinfo | grep “cpu cores”
如果所有物理cpu的cores個數加起來小于邏輯cpu的個數,則該cpu使用了超線程技術。查看每個物理cpu中邏輯cpu的個數:cat /proc/cpuinfo | grep “siblings” —————————————————————————————————————————— 18.從格式不規范的日志中截取字符串 perl -ne ’print “$1\n” if /servletPath=(\S+)/g’ test.log —————————————————————————————————————————— 19.?把所有的文件名含有空格的,把空格去掉 find ./ -type f | while read line;do echo $line|grep -q " " && \mv "$line" $(echo $line|sed 's/ //g');done ------------------------------------------
20.把所有的文件夾的文件名含有空格的,把空格去掉 find ./ -type d -name '*'|while read file; do echo $file|grep -q " " && mv "$file" $(echo $file|tr -d ' '); done 當文件名的末尾以空格結束時,就不能用命令行來實現,需要使用腳本: #!/bin/bash IFS=$'\n' find ./ -type f | while read line;do echo $line|grep -q " " && \mv "$line" $(echo $line|sed 's/ //g');done ------------------------------------------- 21.生成隨機字符串: # tr -dc _A-Z-a-z#$%^*-0-9 </dev/urandom |head -c8
chgSh^eJ 或者 # mkpasswd -l 8 -d 1 -c 3 -C 2 -s 2
G_ze3Hto ------------------------------------------- 22.linux統計PCI插槽數量: [root@vcdog ~]# dmidecode |grep -1 PCI
ISA is supported
PCI is supported
PC Card (PCMCIA) is supported
--
System Slot Information
Designation: PCI Slot J11
Type: 32-bit PCI
Current Usage: In Use
--
System Slot Information
Designation: PCI Slot J12
Type: 32-bit PCI
Current Usage: In Use
--
System Slot Information
Designation: PCI Slot J13
Type: 32-bit PCI
Current Usage: In Use
--
System Slot Information
Designation: PCI Slot J14
Type: 32-bit PCI
Current Usage: Available ---------------------------------------- 23.?nmap探測遠程主機的開放端口及操作系統: # nmap -A -T4?192.168.1.28?//此處可以為主機名,域名,或主機IP地址 Starting Nmap 4.11 (?http://www.insecure.org/nmap/?) at 2010-12-28 09:46 CST
Interesting ports on bogon (192.168.1.29):
Not shown: 1677 closed ports
PORT STATE SERVICE VERSION
135/tcp open msrpc Microsoft Windows RPC
139/tcp open netbios-ssn
445/tcp open microsoft-ds Microsoft Windows XP microsoft-ds
MAC Address: 70:5A:B6:09:45:FA (Unknown)
Device type: general purpose
Running: Microsoft Windows NT/2K/XP
OS details: Microsoft Widows XP SP2
Service Info: OS: Windows ------------------------------------ 24. linux下的文件去掉^M硬回車的方法:
(1)# cat test.txt |tr -d '^M' >test.new
(2).# sed -i 's/^M//g' test.txt?
(3)# dos2unix test.txt?
(4)在vi中用:%s/^M//g 注意:這里的“^M”要使用“CTRL-V CTRL-M”生成,而不是直接鍵入“^M”。 ------------------------------------- 25.刪除文件中的所有空行: 1.使用awk方法如下:
[root@dg ~]# cat t.txt | awk -F '' '{if($1!=null) print $0}'
203.208.46.146?www.google.com
223.208.46.146?www.google.com
203.208.46.147?www.google.com.hk
203.208.46.132 clients1.google.com
203.208.46.149 mail.google.com
? 2.sed方法如下:
[root@dg ~]# sed '/^$/d' t.txt?
203.208.46.146?www.google.com
223.208.46.146?www.google.com
203.208.46.147?www.google.com.hk
203.208.46.132 clients1.google.com
203.208.46.149 mail.google.com
203.208.46.161 chatenabled.mail.google.com
? 3.awk方法如下:
[root@dg ~]# awk 'NF' t.txt?
203.208.46.146?www.google.com
223.208.46.146?www.google.com
203.208.46.147?www.google.com.hk
203.208.46.132 clients1.google.com
203.208.46.149 mail.google.com
203.208.46.161 chatenabled.mail.google.com
? 4.vim中刪除空行如下: :g/^$/d 203.208.46.146?www.google.com
223.208.46.146?www.google.com
203.208.46.147?www.google.com.hk
203.208.46.132 clients1.google.com
203.208.46.149 mail.google.com
203.208.46.161 chatenabled.mail.google.com
------------------------------------ 26.獲取內存條TYPE和SPEED的信息: #??dmidecode |grep -A 16 "Memory Device"|grep -E "Speed|Type"
??????? Type: DDR2 FB-DIMM
??????? Speed: 667 MHz (1.5 ns)
??????? Type: DDR2 FB-DIMM
??????? Speed: 667 MHz (1.5 ns)
??????? Type: DDR2 FB-DIMM
??????? Speed: 667 MHz (1.5 ns)
??????? Type: DDR2 FB-DIMM
??????? Speed: 667 MHz (1.5 ns)
??????? Type: DDR2 FB-DIMM
??????? Type: DDR2 FB-DIMM
??????? Type: DDR2 FB-DIMM
??????? Type: DDR2 FB-DIMM ================================================================= (不斷更新中...)
? ? ?本文轉自vcdog 51CTO博客,原文鏈接:http://blog.51cto.com/255361/836976,如需轉載請自行聯系原作者
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分享平時工作中那些給力的shell命令---(Notice:?藍色部分為在網友孤風顛影基礎上新增加內容) 原帖地址為:http://yunhaozou.org/perl-shell/162.html 1.顯示消耗內存/CPU最多的10個進程 ps aux | sort -nk +4 | tail ps aux | sort -nk +3 | tail —————————————————————————————————————————— 2.查看Apache的并發請求數及其TCP連接狀態 netstat -n | awk ‘/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}’ —————————————————————————————————————————— 3.找出自己最常用的10條命令及使用次數(或求訪問最多的ip數) sed -e ‘s/| /\n/g’ ~/.bash_history |cut -d ‘ ‘ -f 1 | sort | uniq -c | sort -nr | head —————————————————————————————————————————— 4.日志中第10個字段表示連接時間,求平均連接時間 cat access_log |grep “connect cbp” |awk ‘BEGIN{sum=0;count=0;}{sum+=$10;count++;}END{printf(“sum=%d,count=%d,avg=%f\n”,sum,count, sum/count)}’ —————————————————————————————————————————— 5.lsof命令 lsof abc.txt 顯示開啟文件abc.txt的進程 lsof -i :22 知道22端口現在運行什么程序 lsof -c abc 顯示abc進程現在打開的文件 lsof -p 12 看進程號為12的進程打開了哪些文件 —————————————————————————————————————————— 6.殺掉一個程序的所有進程 pkill -9 httpd killall -9 httpd 注意盡量不用-9,數據庫服務器上更不能輕易用kill,否則造成重要數據丟失后果將不堪設想。 —————————————————————————————————————————— 7.rsync命令(要求只同步某天的壓縮文件,而且遠程目錄保持與本地目錄一致) /usr/bin/rsync -azvR –password-file=/etc/rsync.secrets `find . -name “*$yesterday.gz” -type f ` storage@192.168.2.23::logbackup/13.21/ —————————————————————————————————————————— 8.把目錄下*.sh文件改名為*.SH find . -name “*.sh” | sed ’s/\(.*\)\.sh/mv \0 \1.SH/’ |sh find . -name “*.sh” | sed ’s/\(.*\)\.sh/mv & \1.SH/’|sh (跟上面那個效果一樣) —————————————————————————————————————————— 9.ssh執行遠程的程序,并在本地顯示 ssh -n -l zouyunhao 192.168.2.14 “ls -al /home/zouyunhao” —————————————————————————————————————————— 10. 直接用命令行修改密碼 echo “zouyunhaoPassword” |passwd –stdin zouyunhao —————————————————————————————————————————— ssh-keygen ssh-copy-id -i ~/.ssh/id_rsa.pub user@remoteServer —————————————————————————————————————————— 12.以http方式共享當前文件夾的文件 $ python -m SimpleHTTPServer 在瀏覽器訪問http://IP:8000/即可下載當前目錄的文件。 —————————————————————————————————————————— 13.shell段注釋 :<<’echo hello,world!’ —————————————————————————————————————————— 14.查看服務器序列號 dmidecode |grep “Serial Number” (查看機器其他硬件信息也可用這個命令) —————————————————————————————————————————— 15.查看網卡是否有網線物理連接 /sbin/mii-tool —————————————————————————————————————————— 16.查看linux系統或者mysql錯誤碼表示的意思,如查看13錯誤碼表示的意思: perror 13 —————————————————————————————————————————— 17.關于cpu個數查看邏輯cpu個數:cat /proc/cpuinfo | grep “processor” | wc -l
查看物理cpu個數:cat /proc/cpuinfo | grep “physical id” | sort | uniq | wc -l
查看每個物理cpu的核數cores:cat /proc/cpuinfo | grep “cpu cores”
如果所有物理cpu的cores個數加起來小于邏輯cpu的個數,則該cpu使用了超線程技術。查看每個物理cpu中邏輯cpu的個數:cat /proc/cpuinfo | grep “siblings” —————————————————————————————————————————— 18.從格式不規范的日志中截取字符串 perl -ne ’print “$1\n” if /servletPath=(\S+)/g’ test.log —————————————————————————————————————————— 19.?把所有的文件名含有空格的,把空格去掉 find ./ -type f | while read line;do echo $line|grep -q " " && \mv "$line" $(echo $line|sed 's/ //g');done ------------------------------------------
20.把所有的文件夾的文件名含有空格的,把空格去掉 find ./ -type d -name '*'|while read file; do echo $file|grep -q " " && mv "$file" $(echo $file|tr -d ' '); done 當文件名的末尾以空格結束時,就不能用命令行來實現,需要使用腳本: #!/bin/bash IFS=$'\n' find ./ -type f | while read line;do echo $line|grep -q " " && \mv "$line" $(echo $line|sed 's/ //g');done ------------------------------------------- 21.生成隨機字符串: # tr -dc _A-Z-a-z#$%^*-0-9 </dev/urandom |head -c8
chgSh^eJ 或者 # mkpasswd -l 8 -d 1 -c 3 -C 2 -s 2
G_ze3Hto ------------------------------------------- 22.linux統計PCI插槽數量: [root@vcdog ~]# dmidecode |grep -1 PCI
ISA is supported
PCI is supported
PC Card (PCMCIA) is supported
--
System Slot Information
Designation: PCI Slot J11
Type: 32-bit PCI
Current Usage: In Use
--
System Slot Information
Designation: PCI Slot J12
Type: 32-bit PCI
Current Usage: In Use
--
System Slot Information
Designation: PCI Slot J13
Type: 32-bit PCI
Current Usage: In Use
--
System Slot Information
Designation: PCI Slot J14
Type: 32-bit PCI
Current Usage: Available ---------------------------------------- 23.?nmap探測遠程主機的開放端口及操作系統: # nmap -A -T4?192.168.1.28?//此處可以為主機名,域名,或主機IP地址 Starting Nmap 4.11 (?http://www.insecure.org/nmap/?) at 2010-12-28 09:46 CST
Interesting ports on bogon (192.168.1.29):
Not shown: 1677 closed ports
PORT STATE SERVICE VERSION
135/tcp open msrpc Microsoft Windows RPC
139/tcp open netbios-ssn
445/tcp open microsoft-ds Microsoft Windows XP microsoft-ds
MAC Address: 70:5A:B6:09:45:FA (Unknown)
Device type: general purpose
Running: Microsoft Windows NT/2K/XP
OS details: Microsoft Widows XP SP2
Service Info: OS: Windows ------------------------------------ 24. linux下的文件去掉^M硬回車的方法:
(1)# cat test.txt |tr -d '^M' >test.new
(2).# sed -i 's/^M//g' test.txt?
(3)# dos2unix test.txt?
(4)在vi中用:%s/^M//g 注意:這里的“^M”要使用“CTRL-V CTRL-M”生成,而不是直接鍵入“^M”。 ------------------------------------- 25.刪除文件中的所有空行: 1.使用awk方法如下:
[root@dg ~]# cat t.txt | awk -F '' '{if($1!=null) print $0}'
203.208.46.146?www.google.com
223.208.46.146?www.google.com
203.208.46.147?www.google.com.hk
203.208.46.132 clients1.google.com
203.208.46.149 mail.google.com
? 2.sed方法如下:
[root@dg ~]# sed '/^$/d' t.txt?
203.208.46.146?www.google.com
223.208.46.146?www.google.com
203.208.46.147?www.google.com.hk
203.208.46.132 clients1.google.com
203.208.46.149 mail.google.com
203.208.46.161 chatenabled.mail.google.com
? 3.awk方法如下:
[root@dg ~]# awk 'NF' t.txt?
203.208.46.146?www.google.com
223.208.46.146?www.google.com
203.208.46.147?www.google.com.hk
203.208.46.132 clients1.google.com
203.208.46.149 mail.google.com
203.208.46.161 chatenabled.mail.google.com
? 4.vim中刪除空行如下: :g/^$/d 203.208.46.146?www.google.com
223.208.46.146?www.google.com
203.208.46.147?www.google.com.hk
203.208.46.132 clients1.google.com
203.208.46.149 mail.google.com
203.208.46.161 chatenabled.mail.google.com
------------------------------------ 26.獲取內存條TYPE和SPEED的信息: #??dmidecode |grep -A 16 "Memory Device"|grep -E "Speed|Type"
??????? Type: DDR2 FB-DIMM
??????? Speed: 667 MHz (1.5 ns)
??????? Type: DDR2 FB-DIMM
??????? Speed: 667 MHz (1.5 ns)
??????? Type: DDR2 FB-DIMM
??????? Speed: 667 MHz (1.5 ns)
??????? Type: DDR2 FB-DIMM
??????? Speed: 667 MHz (1.5 ns)
??????? Type: DDR2 FB-DIMM
??????? Type: DDR2 FB-DIMM
??????? Type: DDR2 FB-DIMM
??????? Type: DDR2 FB-DIMM ================================================================= (不斷更新中...)
? ? ?本文轉自vcdog 51CTO博客,原文鏈接:http://blog.51cto.com/255361/836976,如需轉載請自行聯系原作者
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