linux常用命令
程序员文章站
2022-05-10 20:31:45
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ln 创建硬连接
ln -s 创建软连接（符号连接）
示例：
aaa@qq.com:~/work/filedir$ date > date.txt
aaa@qq.com:~/work/filedir$ ln -s date.txt l_date
aaa@qq.com:~/work/filedir$ ls
a.out bin date.txt include l_date obj src zieckey_fifo
aaa@qq.com:~/work/filedir$ more l_date
2018年 08月 22日 星期三 21:33:32 CST
aaa@qq.com:~/work/filedir$
S_ISLNK(st_mode)：是否是一个连接.
S_ISREG(st_mode)：是否是一个常规文件.
S_ISDIR(st_mode)：是否是一个目录
S_ISCHR(st_mode)：是否是一个字符设备.
S_ISBLK(st_mode)：是否是一个块设备
S_ISFIFO(st_mode)：是否 是一个FIFO文件.
S_ISSOCK(st_mode)：是否是一个SOCKET文件 使用方式：
一般在之前都会先调用函数stat( FileName, &fp)类函数，意味着将FileName这个文件的信息保存到了地址fp中。此时fp.st_mode就是文件FileName的模式，所以S_ISDIR(fp.st_mode)的函数功能是判断fp所指向文件（也就是FileName）是否为目录（dir）类型。
使用ps命令查看linux中的进程：
可以使用：ps -ef查看所有的进程，若是进程过多可以使用more进行分页显示；
ps -ef | more
使用：
ps -aux | more
查看系统CPU占用资源使用等情况
aaa@qq.com:~$ ps -aux | more
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.1 185416 6036 ? Ss 17:32 0:01 /sbin/init spla
sh
root 2 0.0 0.0 0 0 ? S 17:32 0:00 [kthreadd]
root 4 0.0 0.0 0 0 ? I< 17:32 0:00 [kworker/0:0H]
root 6 0.0 0.0 0 0 ? I< 17:32 0:00 [mm_percpu_wq]
root 7 0.0 0.0 0 0 ? S 17:32 0:00 [ksoftirqd/0]
root 8 0.0 0.0 0 0 ? I 17:32 0:04 [rcu_sched]
root 9 0.0 0.0 0 0 ? I 17:32 0:00 [rcu_bh]
root 10 0.0 0.0 0 0 ? S 17:32 0:00 [migration/0]
root 11 0.0 0.0 0 0 ? S 17:32 0:00 [watchdog/0]
root 12 0.0 0.0 0 0 ? S 17:32 0:00 [cpuhp/0]
root 13 0.0 0.0 0 0 ? S 17:32 0:00 [cpuhp/1]
root 14 0.0 0.0 0 0 ? S 17:32 0:00 [watchdog/1]
root 15 0.0 0.0 0 0 ? S 17:32 0:00 [migration/1]
root 16 0.0 0.0 0 0 ? S 17:32 0:00 [ksoftirqd/1]
root 18 0.0 0.0 0 0 ? I< 17:32 0:00 [kworker/1:0H]
root 19 0.0 0.0 0 0 ? S 17:32 0:00 [cpuhp/2]
root 20 0.0 0.0 0 0 ? S 17:32 0:00 [watchdog/2]
root 21 0.0 0.0 0 0 ? S 17:32 0:00 [migration/2]
root 22 0.0 0.0 0 0 ? S 17:32 0:00 [ksoftirqd/2]
root 24 0.0 0.0 0 0 ? I< 17:32 0:00 [kworker/2:0H]
root 25 0.0 0.0 0 0 ? S 17:32 0:00 [cpuhp/3]
输入:id
查看当前用户id 等信息
aaa@qq.com:~$ id
uid=1000(andrew) gid=1000(andrew) 组=1000(andrew),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),113(lpadmin),128(sambashare)
ps [选项]
下面对命令选项进行说明：
-e 显示所有进程。
-f 全格式。
-h 不显示标题。
-l 长格式。
-w 宽输出。
a 显示终端上的所有进程，包括其他用户的进程。
r 只显示正在运行的进程。
u 以用户为主的格式来显示程序状况。
x 显示所有程序，不以终端机来区分。
ps -ef 显示出的结果：
1.UID 用户ID
2.PID 进程ID
3.PPID 父进程ID
4.C CPU占用率
5.STIME 开始时间
6.TTY 开始此进程的TTY----终端设备
7.TIME 此进程运行的总时间
8.CMD 命令名
pstree命令，使用pstree命令课可以查看进程树：
systemd-+-NetworkManager-+-2*[dhclient]
| |-dnsmasq
| |-{gdbus}
| `-{gmain}
|-accounts-daemon-+-{gdbus}
| `-{gmain}
|-acpid
|-atd
|-avahi-daemon---avahi-daemon
|-colord-+-{gdbus}
| `-{gmain}
|-cron
|-cups-browsed-+-{gdbus}
| `-{gmain}
|-cupsd---9*[dbus]
|-dbus-daemon
|-gnome-keyring-d-+-{dispatch}
| |-{gdbus}
| |-{gmain}
| `-{timer}
|-irqbalance
|-lightdm-+-Xorg---{InputThread}
| |-lightdm-+-upstart-+-MindMaster-+-QtWebEngineProc---QtWebEngineProc---3*[QtWebEngineProc-+-{Chrome_ChildIOT}]
| | | | | |-3*[{CompositorTileW}]+
| | | | | |-{Compositor}]
| | | | | |-{HTMLParserThrea}]
| | | | | |-{Renderer::FILE}]
| | | | | `-{ScriptStreamerT}]
| | | | |-{AudioThread}
| | | | |-{BrowserBlocking}
| | | | |-{Chrome_CacheThr}
| | | | |-{Chrome_ChildIOT}
| | | | |-{Chrome_DBThread}
| | | | |-{Chrome_FileThre}
| | | | |-{Chrome_FileUser}
| | | | |-{Chrome_IOThread}
| | | | |-{Chrome_InProcGp}
| | | | |-{Chrome_ProcessL}
| | | | |-{CompositorTileW}
| | | | |-{IndexedDB}
| | | | |-{MindMaster}
| | | | |-{NetworkChangeNo}
| | | | |-{QDBusConnection}
| | | | |-{QNetworkAccessM}
| | | | |-{QXcbEventReader}
| | | | |-{Qt bearer threa}
| | | | |-{inotify_reader}
| | | | |-{sandbox_ipc_thr}
| | | | `-{threaded-ml}
| | | |-at-spi-bus-laun-+-dbus-daemon
| | | | |-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-at-spi2-registr-+-{gdbus}
| | | | `-{gmain}
| | | |-bamfdaemon-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-code-+-code-+-code-+-2*[code-+-{TaskSchedulerSe}]
| | | | | | | `-7*[{code}]]
| | | | | | |-code-+-Microsoft.VSCod-+-2*[Microsoft.VSCod---7*[{Microsoft.VSCod}]]
| | | | | | | | `-16*[{Microsoft.VSCod}]
| | | | | | | |-{TaskSchedulerSe}
| | | | | | | `-8*[{code}]
| | | | | | |-{Chrome_ChildIOT}
| | | | | | |-3*[{CompositorTileW}]
| | | | | | |-{Compositor}
| | | | | | |-{GpuMemoryThread}
| | | | | | |-{Renderer::FILE}
| | | | | | |-{TaskSchedulerRe}
| | | | | | |-{TaskSchedulerSe}
| | | | | | `-9*[{code}]
| | | | | `-code-+-{Chrome_ChildIOT}
| | | | | |-3*[{CompositorTileW}]
| | | | | |-{Compositor}
| | | | | |-{GpuMemoryThread}
| | | | | |-{Renderer::FILE}
| | | | | |-{TaskSchedulerRe}
| | | | | |-{TaskSchedulerSe}
| | | | | `-7*[{code}]
| | | | |-code-+-{Chrome_ChildIOT}
| | | | | |-{TaskSchedulerCo}
| | | | | |-{TaskSchedulerSe}
| | | | | `-{Watchdog}
| | | | |-{AudioThread}
| | | | |-{Chrome_IOThread}
| | | | |-{CompositorTileW}
| | | | |-{CrShutdownDetec}
| | | | |-{D-Bus thread}
| | | | |-{NetworkChangeNo}
| | | | |-2*[{TaskSchedulerBa}]
| | | | |-2*[{TaskSchedulerFo}]
| | | | |-{TaskSchedulerSe}
| | | | |-6*[{TaskSchedulerSi}]
| | | | |-9*[{code}]
| | | | |-{dconf worker}
| | | | |-{gdbus}
| | | | |-{gmain}
| | | | |-{inotify_reader}
| | | | |-{sandbox_ipc_thr}
| | | | `-{threaded-ml}
| | | |-compiz-+-{dconf worker}
| | | | |-{gdbus}
| | | | |-{gmain}
| | | | `-4*[{pool}]
| | | |-2*[dbus-daemon]
| | | |-dconf-service-+-{gdbus}
| | | | `-{gmain}
| | | |-evolution-addre-+-evolution-addre-+-{dconf worker}
| | | | | |-{evolution-addre}
| | | | | |-{gdbus}
| | | | | `-{gmain}
| | | | |-{dconf worker}
| | | | |-{evolution-addre}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-evolution-calen-+-evolution-calen-+-{dconf worker}
| | | | | |-{evolution-calen}
| | | | | |-{gdbus}
| | | | | `-{gmain}
| | | | |-evolution-calen-+-{dconf worker}
| | | | | |-2*[{evolution-calen}]
| | | | | |-{gdbus}
| | | | | |-{gmain}
| | | | | `-{pool}
| | | | |-{dconf worker}
| | | | |-{evolution-calen}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-evolution-sourc-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-fcitx---2*[{fcitx}]
| | | |-fcitx-dbus-watc
| | | |-firefox-+-2*[Web Content-+-{Chrome_~dThread}]
| | | | | |-{DOM File}]
| | | | | |-{DOM Worker}]
| | | | | |-{HTML5 Parser}]
| | | | | |-{Hang Monitor}]
| | | | | |-{ImageBr~geChild}]
| | | | | |-{ImageIO}]
| | | | | |-{ImgDecoder #1}]
| | | | | |-{ImgDecoder #2}]
| | | | | |-4*[{JS Helper}]]
| | | | | |-{JS Watchdog}]
| | | | | |-{ProcessHangMon}]
| | | | | |-{ProfilerChild}]
| | | | | |-{Socket Thread}]
| | | | | |-{StyleThread#0}]
| | | | | |-{StyleThread#1}]
| | | | | |-{StyleThread#2}]
| | | | | |-{Timer}]
| | | | | |-{VideoChild}]
| | | | | `-{dconf worker}]
| | | | |-Web Content-+-{Chrome_~dThread}
| | | | | |-{DOM File}
| | | | | |-{Hang Monitor}
| | | | | |-{ImageBr~geChild}
| | | | | |-{ImageIO}
| | | | | |-{ImgDecoder #1}
| | | | | |-4*[{JS Helper}]
| | | | | |-{JS Watchdog}
| | | | | |-{ProcessHangMon}
| | | | | |-{ProfilerChild}
| | | | | |-{Socket Thread}
| | | | | |-{Timer}
| | | | | |-{VideoChild}
| | | | | `-{dconf worker}
| | | | |-{AudioIPC Callba}
| | | | |-{AudioIPC Server}
| | | | |-{Cache I/O}
| | | | |-{Cache2 I/O}
| | | | |-{Classif~ Update}
| | | | |-{Compositor}
| | | | |-{Cookie}
| | | | |-3*[{DOM Worker}]
| | | | |-4*[{DataStorage}]
| | | | |-{FS Broker 12985}
| | | | |-{FS Broker 4846}
| | | | |-{FS Broker 4917}
| | | | |-{FileBlockCache}
| | | | |-{GMPThread}
| | | | |-{Gecko_IOThread}
| | | | |-{HTML5 Parser}
| | | | |-{Hang Monitor}
| | | | |-{IPDL Background}
| | | | |-{ImageBr~geChild}
| | | | |-{ImageIO}
| | | | |-{ImgDecoder #1}
| | | | |-{ImgDecoder #2}
| | | | |-4*[{JS Helper}]
| | | | |-{JS Watchdog}
| | | | |-{Link Monitor}
| | | | |-{LoadRoots}
| | | | |-{MediaCache}
| | | | |-{ProcessHangMon}
| | | | |-{ProxyResolution}
| | | | |-{QuotaManager IO}
| | | | |-{SaveScripts}
| | | | |-{Socket Thread}
| | | | |-{Softwar~cThread}
| | | | |-{StyleThread#0}
| | | | |-{StyleThread#1}
| | | | |-{StyleThread#2}
| | | | |-{SysProxySetting}
| | | | |-{Timer}
| | | | |-{URL Classifier}
| | | | |-{VRListener}
| | | | |-{dconf worker}
| | | | |-2*[{firefox}]
| | | | |-{gdbus}
| | | | |-{gmain}
| | | | |-{localStorage DB}
| | | | |-{mozStorage #1}
| | | | |-{mozStorage #2}
| | | | |-{mozStorage #3}
| | | | |-{mozStorage #4}
| | | | |-{mozStorage #5}
| | | | |-{mozStorage #6}
| | | | |-{mozStorage #7}
| | | | `-{threaded-ml}
| | | |-gconfd-2
| | | |-gnome-session-b-+-deja-dup-monito-+-{dconf worker}
| | | | | |-{gdbus}
| | | | | `-{gmain}
| | | | |-gnome-software-+-{dconf worker}
| | | | | |-{gdbus}
| | | | | `-{gmain}
| | | | |-nautilus-+-{dconf worker}
| | | | | |-{gdbus}
| | | | | |-{gmain}
| | | | | `-{pool}
| | | | |-nm-applet-+-{dconf worker}
| | | | | |-{gdbus}
| | | | | `-{gmain}
| | | | |-polkit-gnome-au-+-{dconf worker}
| | | | | |-{gdbus}
| | | | | `-{gmain}
| | | | |-unity-fallback--+-{dconf worker}
| | | | | |-{gdbus}
| | | | | `-{gmain}
| | | | |-update-notifier-+-{dconf worker}
| | | | | |-{gdbus}
| | | | | `-{gmain}
| | | | |-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-gnome-terminal--+-bash-+-pstree
| | | | | `-vim
| | | | |-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-gpg-agent
| | | |-gvfs-afc-volume-+-{gdbus}
| | | | |-{gmain}
| | | | `-{gvfs-afc-volume}
| | | |-gvfs-goa-volume-+-{gdbus}
| | | | `-{gmain}
| | | |-gvfs-gphoto2-vo-+-{gdbus}
| | | | `-{gmain}
| | | |-gvfs-mtp-volume-+-{gdbus}
| | | | `-{gmain}
| | | |-gvfs-udisks2-vo-+-{gdbus}
| | | | `-{gmain}
| | | |-gvfsd-+-{gdbus}
| | | | `-{gmain}
| | | |-gvfsd-dnssd-+-{gdbus}
| | | | `-{gmain}
| | | |-gvfsd-fuse-+-{gdbus}
| | | | |-{gmain}
| | | | |-{gvfs-fuse-sub}
| | | | `-2*[{gvfsd-fuse}]
| | | |-gvfsd-metadata-+-{gdbus}
| | | | `-{gmain}
| | | |-gvfsd-network-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-gvfsd-smb-brows-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-gvfsd-trash-+-{gdbus}
| | | | `-{gmain}
| | | |-hud-service-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-indicator-appli-+-{gdbus}
| | | | `-{gmain}
| | | |-indicator-bluet-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-indicator-datet-+-{dconf worker}
| | | | |-{gdbus}
| | | | |-{gmain}
| | | | |-{indicator-datet}
| | | | `-{pool}
| | | |-indicator-keybo-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-indicator-messa-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-indicator-power-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-indicator-print-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-indicator-sessi-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-indicator-sound-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-netease-cloud-m-+-netease-cloud-m---netease-cloud-m-+-{Chrome_ChildIOT}
| | | | | |-3*[{CompositorTileW}]
| | | | | |-{Compositor}
| | | | | |-{GpuMemoryThread}
| | | | | |-{Media}
| | | | | |-{Renderer::FILE}
| | | | | |-{ScriptStreamerT}
| | | | | |-2*[{TaskSchedulerRe}]
| | | | | `-{TaskSchedulerSe}
| | | | |-{AudioThread}
| | | | |-{BrowserBlocking}
| | | | |-5*[{CachePoolWorker}]
| | | | |-{Chrome_CacheThr}
| | | | |-{Chrome_DBThread}
| | | | |-{Chrome_FileThre}
| | | | |-{Chrome_FileUser}
| | | | |-{Chrome_IOThread}
| | | | |-{Chrome_ProcessL}
| | | | |-{CompositorTileW}
| | | | |-{IndexedDB}
| | | | |-{NetworkChangeNo}
| | | | |-{QDBusConnection}
| | | | |-3*[{QNetworkAccessM}]
| | | | |-10*[{QThread}]
| | | | |-{QXcbEventReader}
| | | | |-{Qt bearer threa}
| | | | |-2*[{TaskSchedulerBa}]
| | | | |-2*[{TaskSchedulerFo}]
| | | | |-{TaskSchedulerSe}
| | | | |-2*[{WorkerPool/1272}]
| | | | |-{dconf worker}
| | | | |-{gdbus}
| | | | |-{gmain}
| | | | |-{inotify_reader}
| | | | |-2*[{netease-cloud-m}]
| | | | |-{sandbox_ipc_thr}
| | | | `-2*[{threaded-ml}]
| | | |-notify-osd-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-pulseaudio-+-{alsa-sink-ALC26}
| | | | `-{alsa-source-ALC}
| | | |-sh---zeitgeist-daemo-+-{gdbus}
| | | | `-{gmain}
| | | |-sogou-qimpanel-+-3*[{QInotifyFileSys}]
| | | | |-2*[{QThread}]
| | | | `-5*[{sogou-qimpanel}]
| | | |-sogou-qimpanel-
| | | |-unity-files-dae-+-{dconf worker}
| | | | |-{gdbus}
| | | | |-{gmain}
| | | | `-4*[{pool}]
| | | |-unity-panel-ser-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-unity-scope-hom-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-unity-scope-loa-+-{dconf worker}
| | | | |-{gdbus}
| | | | `-{gmain}
| | | |-unity-settings--+-syndaemon
| | | | |-{dconf worker}
| | | | |-{gdbus}
| | | | |-{gmain}
| | | | `-{threaded-ml}
| | | |-2*[upstart-dbus-br]
| | | |-upstart-file-br
| | | |-upstart-udev-br
| | | |-window-stack-br
| | | |-zeitgeist-datah-+-{gdbus}
| | | | |-{gmain}
| | | | `-4*[{pool}]
| | | `-zeitgeist-fts-+-{gdbus}
| | | `-{gmain}
| | |-{gdbus}
| | `-{gmain}
| |-{gdbus}
| `-{gmain}
|-nmbd
|-plymouth
|-plymouthd
|-polkitd-+-{gdbus}
| `-{gmain}
|-rsyslogd-+-{in:imklog}
| |-{in:imuxsock}
| `-{rs:main Q:Reg}
|-rtkit-daemon---2*[{rtkit-daemon}]
|-smbd---5*[smbd]
|-snapd---9*[{snapd}]
|-systemd---(sd-pam)
|-systemd-journal
|-systemd-logind
|-systemd-timesyn---{sd-resolve}
|-systemd-udevd
|-thermald---{thermald}
|-udisksd-+-{cleanup}
| |-{gdbus}
| |-{gmain}
| `-{probing-thread}
|-upowerd-+-{gdbus}
| `-{gmain}
|-whoopsie-+-{gdbus}
| `-{gmain}
`-wpa_supplicantkill -l
1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL 5) SIGTRAP
6) SIGABRT 7) SIGBUS 8) SIGFPE 9) SIGKILL 10) SIGUSR1
11) SIGSEGV 12) SIGUSR2 13) SIGPIPE 14) SIGALRM 15) SIGTERM
16) SIGSTKFLT 17) SIGCHLD 18) SIGCONT 19) SIGSTOP 20) SIGTSTP
21) SIGTTIN 22) SIGTTOU 23) SIGURG 24) SIGXCPU 25) SIGXFSZ
26) SIGVTALRM 27) SIGPROF 28) SIGWINCH 29) SIGIO 30) SIGPWR
31) SIGSYS 34) SIGRTMIN 35) SIGRTMIN+1 36) SIGRTMIN+2 37) SIGRTMIN+3
38) SIGRTMIN+4 39) SIGRTMIN+5 40) SIGRTMIN+6 41) SIGRTMIN+7 42) SIGRTMIN+8
43) SIGRTMIN+9 44) SIGRTMIN+10 45) SIGRTMIN+11 46) SIGRTMIN+12 47) SIGRTMIN+13
48) SIGRTMIN+14 49) SIGRTMIN+15 50) SIGRTMAX-14 51) SIGRTMAX-13 52) SIGRTMAX-12
53) SIGRTMAX-11 54) SIGRTMAX-10 55) SIGRTMAX-9 56) SIGRTMAX-8 57) SIGRTMAX-7
58) SIGRTMAX-6 59) SIGRTMAX-5 60) SIGRTMAX-4 61) SIGRTMAX-3 62) SIGRTMAX-2
63) SIGRTMAX-1 64) SIGRTMAX语法
kill [-s <信息名称或编号>][程序] 或 kill [-l <信息编号>]参数说明：
- -l <信息编号> 若不加<信息编号>选项，则-l参数会列出全部的信息名称。
- -s <信息名称或编号> 指定要送出的信息。
- [程序] [程序]可以是程序的PID或是PGID，也可以是工作编号。
杀死进程
# kill 12345强制杀死进程
# kill -KILL 123456发送SIGHUP信号，可以使用一下信号
# kill -HUP pid彻底杀死进程
# kill -9 123456NC命令
测试协议的时候若是没有数据抓包可一下linux上自己创造，比如使用：
nc 命令：
可以使用linux自带的nc命令进行聊天，再使用wireshark进行抓包;
nc -l 1234 # Server 1
nc 127.0.0.1 1234 # 127.0.0.1 换成 Server 1 的 IP 即可.
打开两个终端之后，就可以直接进行相互之间的通话了，想结束聊天可以使用^D (Ctrl + D)
扫描PORT看那个Port是开放的
nc -v -w 2 localhost -z 30-80
localhost [127.0.0.1] 80 (http) open
localhost [127.0.0.1] 53 (domain) open传送资料
cat filename | nc -l 9090 # 通过 9090 port 传送 filename 的档案内容
nc localhost 9090 # 接收 9090 port 传来档案内容档案传送
nc -l 1234 > filename # 接收 Server 先建立 (Port: 1234)
nc 127.0.0.1 1234 < test.txt # 传送 Server 然后建立连接并产送档案的内容. (要是使用的是其他 的IP将127.0.0.1换成要使用的额IP)
Server 端加密: nc localhost 1567 | mcrypt –flush –bare -F -q -d -m ecb > file.txt
Client 端解密: mcrypt –flush –bare -F -q -m ecb < file.txt | nc -l 1567nc 与 telnet 连通
nc -l 1234 # 建立 1234 port socket server
telnet localhost 1234 # 連到 socket server
# 再來互相打字, 都可以相互接收
Server 直接打開一個 Shell: nc -l 1567 -e /bin/bash -i
Client 連進來: nc 172.31.100.7 1567nc 跑影音流
Server: cat video.avi | nc -l 1567
Client: nc localhost 1567 | mplayer -vo x11 -cache 3000 -１．iso镜像就是将文件包括文件系统本身制作成一个后后缀为iso的文件
在ubuntu上使用cat命令制作ios镜像
２．查看iso文件
１．
cat /dev/cdrom > a.iso 将cdrom中的文件制作成iso文件
想要查看一个iso文件的时候使用：
mount -t iso9660 -o loop a.iso /mnt
然后iso文件就会出现在 /mnt目录下，因为iso文件是二进制文件，因此必须加 -o 将其虚拟成回环文件
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