ze 正则 "\" 转义 ------for echo sed

1cpuer

# 2018-10-08 17:23:13 1538990593 bash:!4336!:/mnt/i/je-d/sou-d
# echo '`~!$^&*()-+[]|\"'\''.?\/' | sed "s/\$/__&__/g"
`~!$^&*()-+[]|\"'.?\/____
# 2018-10-08 17:23:25 1538990605 bash:!4337!:/mnt/i/je-d/sou-d
# echo '`~!$^&*()-+[]|\"'\''.?\/' | sed "s/\\$/__&__/g"
`~!__$__^&*()-+[]|\"'.?\/
# 2018-10-08 17:23:34 1538990614 bash:!4338!:/mnt/i/je-d/sou-d
# echo '`~!$^&*()-+[]|\"'\''.?\/' | sed "s/\\\$/__&__/g"
`~!__$__^&*()-+[]|\"'.?\/
# 2018-10-08 17:23:45 1538990625 bash:!4339!:/mnt/i/je-d/sou-d
# echo '`~!$^&*()-+[]|\"'\''.?\/' | sed "s/\\\\$/__&__/g"
`~!$^&*()-+[]|\"'.?\/
# 2018-10-08 17:25:30 1538990730 bash:!4340!:/mnt/i/je-d/sou-d
# echo '`~!$^&*()-+[]|\"'\''.?\/' | sed "s/'/__&__/g"
`~!$^&*()-+[]|\"__'__.?\/
# 2018-10-08 17:26:23 1538990783 bash:!4341!:/mnt/i/je-d/sou-d
# echo '`~!$^&*()-+[]|\"'\''.?\/' | sed "s/`/__&__/g"
> ^C
# 2018-10-08 17:27:44 1538990864 bash:!4342!:/mnt/i/je-d/sou-d
# echo '`~!$^&*()-+[]|\"'\''.?\/' | sed "s/\`/__&__/g"
__`__~!$^&*()-+[]|\"'.?\/
# 2018-10-08 17:27:48 1538990868 bash:!4343!:/mnt/i/je-d/sou-d
# echo '`~!$^&*()-+[]|\"'\''.?\/' | sed "s/\\`/__&__/g"
> ^C
# 2018-10-08 17:28:05 1538990885 bash:!4344!:/mnt/i/je-d/sou-d
# echo '`~!$^&*()-+[]|\"'\''.?\/' | sed "s/\\\`/__&__/g"
____`~!$^&*()-+[]|\"'.?\/
# 2018-10-08 17:28:16 1538990896 bash:!4345!:/mnt/i/je-d/sou-d
# echo '`~!$^&*()-+[]|\"'\''.?\/' | sed "s/\\\\`/__&__/g"
> ^C
# 2018-10-08 17:28:39 1538990919 bash:!4346!:/mnt/i/je-d/sou-d
##########--------------------- ^C 有 3 个 等效于无。第 2 个 "\`" ------才是真x~=?!. ----[}=={]