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soarpenguinsoarpenguin
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add ethtool usage and group other command usage.
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‎bashrc/oneline_cmd‎

Lines changed: 74 additions & 55 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,4 @@
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# one line cmd for static state of tcp/ip.
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netstat -pant | awk '/^tcp/ {++state[$6]} END {for(key in state) printf("%-10s\t%d\n", key,state[key])}'
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1+
################## networking ##################
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# system route table
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# Routing tables
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#
@@ -29,36 +27,27 @@ netstat -pant | awk '/^tcp/ {++state[$6]} END {for(key in state) printf("%-10s\t
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# D Route was created dynamically or by ICMP redirect;
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netstat -nr
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# one line cmd display dir file.
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ls -lR | grep -v total | awk 'BEGIN { OFS="\t"; ORS="\n-->"} {print $1,$3,$NF}'
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# find failure of soft links
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find . -type l | perl -lne 'print if ! -e'
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# sort filename by column 1
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sort -k1,1n filename
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#static memory for process
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ps -eo fname,rss | awk '{arr[$1]+=$2} END {for (i in arr) {print i,arr[i]}}' | sort -k2 -nr | column -t
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# one line cmd display tcp/ip info.
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ss --options --extended --memory --processes --info
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ss -an | grep "TIME-WAIT" | awk '{print $NF}' | grep -P "^(\d+\.){3}(\d+):\d+$" | grep -oP "(\d+\.){3}(\d+)" | sort | uniq -c
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ss --info sport = :2112 dport = :4057
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ss -tan 'sport = :80' | awk '{print $(NF)" "$(NF-1)}' | sed 's/:[^ ]*//g' | sort | uniq -c
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#ifconfig
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ifconfig eth0 mtu 1500
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ifconfig eth0 down
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ifconfig eth0 up
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# display network and route
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ip route show
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ip ro add 10.0.0.0/8 via 10.11.11.254
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#config initcwnd and initrwnd
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ip route | while read p; do echo "ip route change $p initcwnd 10 initrwnd 10"; done
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#iptables
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#iptables [-t table] command [match] [target/jump]
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# -t --table: table(filter, nat, mangle, raw)
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# -A -D -I -R: chain -L,--lsit,-F,--flush,-Z,-N,-X,-P,-E
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# match regx: tcp,udp,icmp,limit,mac,mark,owner,state,tos,ttl
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# -j target:(ACCEPT, DROP, REJECT)
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iptables -A INPUT -p tcp --dport 80 -m time --timestart 09:00 --timestop 18:00 -j DROP
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iptables -A INPUT -s 192.168.1.0/24 -p tcp --dport 22 -j ACCEPT
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iptables -t filter -A INPUT -s 192.168.1.1 -j DROP
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#------------- network monitoring --------------
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#iptraf | tcpdump | tcpflow | ss | netstat
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iptraf
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#tcpdump
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#tcpdump [ -AdDeflLnNOpqRStuUvxX ] [ -c count ]
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# [ -C file_size ] [ -F file ]
@@ -79,15 +68,65 @@ tcpdump -nnvXSs 0 -c2 icmp
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#tcpflow
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tcpflow -cp -i eth0 "port 80"
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#iptables
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#iptables [-t table] command [match] [target/jump]
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# -t --table: table(filter, nat, mangle, raw)
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# -A -D -I -R: chain -L,--lsit,-F,--flush,-Z,-N,-X,-P,-E
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# match regx: tcp,udp,icmp,limit,mac,mark,owner,state,tos,ttl
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# -j target:(ACCEPT, DROP, REJECT)
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iptables -A INPUT -p tcp --dport 80 -m time --timestart 09:00 --timestop 18:00 -j DROP
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iptables -A INPUT -s 192.168.1.0/24 -p tcp --dport 22 -j ACCEPT
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iptables -t filter -A INPUT -s 192.168.1.1 -j DROP
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# one line cmd display tcp/ip info.
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ss --options --extended --memory --processes --info
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ss -an | grep "TIME-WAIT" | awk '{print $NF}' | grep -P "^(\d+\.){3}(\d+):\d+$" | grep -oP "(\d+\.){3}(\d+)" | sort | uniq -c
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ss --info sport = :2112 dport = :4057
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ss -tan 'sport = :80' | awk '{print $(NF)" "$(NF-1)}' | sed 's/:[^ ]*//g' | sort | uniq -c
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# one line cmd for static state of tcp/ip.
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netstat -tanl
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netstat -pant | awk '/^tcp/ {++state[$6]} END {for(key in state) printf("%-10s\t%d\n", key,state[key])}'
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#check smp_affinity:
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# Ethernet controller
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# MSI-X: Enable+ Count=9 Masked- (Enable+ and Count > 1)
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lspci -vvv | less
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#check ring buffer
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ethtool -g eth0
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#check net interface offloading
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ethtool -k eth0 #look option
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ethtool -K eth0 tso off #set option
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#ifconfig
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ifconfig eth0 mtu 1500
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ifconfig eth0 down
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ifconfig eth0 up
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################## kernel compile ##################
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# BIOS -> MBR
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# grub -> kernel(bzImage) /boot/vmlinuz-3.2.0-74-generic-pae
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# -> initrd.img /boot/initrd.img-3.2.0-74-generic-pae
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# initrd.img: some drivers and kernel module
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#### compile a new kernel from source code
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#get a template .config file
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cp config-3.2.0-74-generic-pae .config
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#run make menuconfig need some package: ncurses-devel
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#(ubuntu:sudo apt-get install libncurses5-dev)
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#modify the .config file
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make menuconfig
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#compile the kernel
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make bzImage
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#compile the modules
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make modules
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make modules_install
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#install kernel: cp arch/i386/boot/bzImage /boot/vmlinuz-xxx && mkinitrd /boot/initrd-xxx.img xxx && vi /boot/grub/grub.conf
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make install
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############# command ##################
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# one line cmd display dir file.
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ls -lR | grep -v total | awk 'BEGIN { OFS="\t"; ORS="\n-->"} {print $1,$3,$NF}'
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# find failure of soft links
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find . -type l | perl -lne 'print if ! -e'
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# sort filename by column 1
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sort -k1,1n filename
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#static memory for process
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ps -eo fname,rss | awk '{arr[$1]+=$2} END {for (i in arr) {print i,arr[i]}}' | sort -k2 -nr | column -t
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#RAID0
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mdadm -C /dev/md0 -a yes -l 0 -n 2 /dev/sdb /dev/sdc
@@ -117,25 +156,6 @@ slabtop -o | grep -E '(^ OBJS|tw_sock_TCP|tcp_bind_bucket)'
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#trace network syscall for a existed PID.
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strace -p $PID -f -e trace=network -s 10000
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# BIOS -> MBR
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# grub -> kernel(bzImage) /boot/vmlinuz-3.2.0-74-generic-pae
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# -> initrd.img /boot/initrd.img-3.2.0-74-generic-pae
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# initrd.img: some drivers and kernel module
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#### compile a new kernel from source code
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#get a template .config file
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cp config-3.2.0-74-generic-pae .config
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#run make menuconfig need some package: ncurses-devel
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#(ubuntu:sudo apt-get install libncurses5-dev)
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#modify the .config file
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make menuconfig
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#compile the kernel
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make bzImage
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#compile the modules
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make modules
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make modules_install
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#install kernel: cp arch/i386/boot/bzImage /boot/vmlinuz-xxx && mkinitrd /boot/initrd-xxx.img xxx && vi /boot/grub/grub.conf
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make install
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tr -c "[:digit:]" " " < /dev/urandom | dd cbs=$COLUMNS conv=unblock | GREP_COLOR="1;32" grep --color "[^ ]"
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#display one line '#' with screen width
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printf "%`tput cols`s" | tr ' ' '#'
@@ -148,7 +168,6 @@ pip install django --index-url http://pypi.douban.com/simple
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# (?<=exp) post match
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# (?<!exp) post not match
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# regx (?<=<(\w+)>).*(?=<\/\1>) for html tag
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# checks to [192.168.32.208]: host [32.208 xuebao] not found
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# match [xxx] and [xxx] content.
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grep -Po '(?<=\[)[^]]+'

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