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--- dev:tricks:linux [2015/04/08 05:19] – external edit 127.0.0.1
+++ dev:tricks:linux [2020/06/06 23:32] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 ====== Linux Tricks ======
 ===== Linux Common =====
+==== XML beautiful format command ====
+<code bash>
+cat xxx.xml |  xmllint --format -
+</code>
+==== Remount filesystem as read-write ====
+<code bash>
+mount -o rw,remount /
+</code>
+==== Useful tools to monitor linux ====
+<code bash>
+iostat
+meminfo/free
+mpstat
+netstat
+nmon
+pmap
+ps/pstree
+sar
+strace
+tcpdump
+top
+uptime
+vmstat
+wireshark
+</code>
+==== Use ipref to test network ====
+<code bash>
+#UDP mode
+#Server side
+iperf -u -s
+#Client side
+iperf -u -c 192.168.1.1 -b 100M -t 60
+#Using 30 threads with 5Mbps each
+iperf -u -c 192.168.1.1 -b 5M -P 30 -t 60
+#Test both download and upload bandwidth
+iperf -u -c 192.168.1.1 -b 100M -d -t 60
+#TCP mode
+#Server side
+iperf -s
+#Client side
+iperf -c 192.168.1.1 -t 60
+#Using 30 threads
+iperf -c 192.168.1.1 -P 30 -t 60
+#Test both download and upload bandwidth
+iperf -c 192.168.1.1 -d -t 60
+</code>
+==== Add mount --bind info in /etc/fstab ====
+<code bash>
+/mnt/hdd1/test /home/test/ext none rw,bind 0 0
+</code>
 ==== Scan local IPv4 opened ports ====
 <code bash>
@@ Line 486: / Line 542: @@
 ===== Ubuntu/Debian =====
+==== Automatically install dependencies with "dpkg -i" ====
+  - dpkg -i
+  - If it needs dependencies, get them automatically with apt-get -y -f --force-yes install. dpkg -i has generated the list of unresolved dependencies, apt-get -f will just pick it up.
+  - Run the dpkg -i again
+==== Ubuntu/Debian auto login ====
+<code bash>
+sudo apt-get install mingetty
+vim nano /etc/inittab
+#change the line 1:2345:respawn:/sbin/getty 38400 tty1 to 1:2345:respawn:/sbin/mingetty --autologin <user-name>  --noclear tty1
+</code>
 ==== Connect PPTP VPN ====
 <code bash>
@@ Line 561: / Line 628: @@
 ==== Set timezone to GMT+8 ====
 <code bash>
-echo "Asia/Shanghai" > /etc/timezone
+ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
 or
 sudo dpkg-reconfigure tzdata
@@ Line 624: / Line 691: @@
 <code bash>
 kernelver=$(uname -r | sed -r 's/-[a-z]+//')
-ls /boot/{abi,vmlinuz,config,System.map,initrd.img}-[0-9\.-]*.* | grep -ve $kernelver | xargs rm -f
+dpkg -l linux-{image,headers,image-extra}-"[0-9]*" | awk '/ii/{print $2}' | grep -ve $kernelver | xargs dpkg --force-all -P
-#dpkg -l linux-{image,headers}-"[0-9]*" | awk '/ii/{print $2}' | grep -ve $kernelver | xargs apt-get purge -y
 </code>
 ==== Install Lyx ====