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Linux终端按ctrl-s的效果

2019年5月21日 / 41次阅读
Shell

Ctrl+S 用于暂停屏幕刷新,一般用在屏幕大量信息不停刷新时暂停,比如tomcat运行时一直报错,而人眼又看不清楚时。看完当前信息后可以使用Ctrl+Q恢复。经实测暂停期间程序将被阻断

CTRL-S and CTRL-Q are called flow-control characters. They represent an antiquated way of stopping and restarting the flow of output from one device to another (e.g., from the computer to your terminal) that was useful when the speed of such output was low. They are rather obsolete in these days of high-speed networks. In fact, under the latter conditions, CTRL-S and CTRL-Q are basically a nuisance. The only thing you really need to know about them is that if your screen output becomes “stuck,” then you may have hit CTRL-S by accident. Type CTRL-Q to restart the output; any keys you may have hit in between will then take effect.

跟终端设置有关:

[jw@localhost ~]$ stty -a
speed 38400 baud; rows 24; columns 80; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = M-^?; eol2 = M-^?;
swtch = M-^?; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W;
lnext = ^V; flush = ^O; min = 1; time = 0;
-parenb -parodd cs8 hupcl -cstopb cread -clocal -crtscts
-ignbrk brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff
-iuclc ixany imaxbel iutf8
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt
echoctl echoke

如果在VIM窗口不小心按了ctrl-s,屏幕freeze,不要紧张,也不要乱按,只需要按ctrl-q就可以恢复。

本文链接:https://www.maixj.net/ict/linux-ctrl-s-21470

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