sed默认会把输入行读取到模式空间,简单理解就是一个内存缓冲区,sed子命令处理的内容是模式空间中的内容,而非直接处理文件内容。因此在sed修改模式空间内容之后,并非直接写入修改输入文件,而是打印输出到标准输出。如果需要修改输入文件,那么就可以指定-i选项。 不使用-i [root@xxx ~]# cat message hello123world [r...
sed -i '/特定字符串/i 新行字符串' file #!/bin/bash del_stdin_buf() { read-d'' -t 0.1} echo"Setting https enabled for remote access..."https_port=`grep'dport 443' /etc/sysconfig/iptables | wc -l`if[ $https_port -eq0]thensed-i"/-A INPUT -j REJECT --reject-with icmp-h...
一，单引号改为双引号 sed -i "s/$1/$2/g" 1.txt 二，把shell变量$1和$2拿到单引号外面来 sed -i 's/'$1'/'$2'/g' 1.txt 原因其实就是单引号会消除$取值符号的特殊含义，$只会被解析为字符本身。
# It contains the one file "frag.ksh" # To extract contents, type # sh file # if [ –f frag.ksh ] then echo frag.ksh exists: will not overwrite else echo extracting frag.ksh sed 's/^X//' >frag.ksh <<_EOF_ X# This is frag.ksh X# Not very interesting, really. Xecho frag...
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config setenforce 0 fi } #Check system check_sys(){ local checkType=$1 local value=$2 local release='' local systemPackage='' if [[ -f /etc/redhat-release ]]; then release="centos" ...
sed -i "273ilet g:ycm_clangd_binary_path='/usr/bin/clang'" ~/.vimrc python3 ./install.py return fi } || { python3 ./install.py --clang-completer } || { echo "###" echo "Build error, trying rebuild without Clang." echo "###" python3 ./install.py } ...
68 sed -i "/^$f/d" a # 删除匹配行 69 sed -i '/aaa/,$d' # 删除匹配行到末尾 70 sed -i "s/=/:/" c # 直接对文本替换 71 sed -i "/^pearls/s/$/j/" # 找到pearls开头在行尾加j 72 sed '/1/,/3/p' file # 打印1和3之间的行 73 sed -n '1p' 文件# 取出指定...
You can useI >> "[command]"orSh("[command]")in any Python project. Here's an example of getting all file which name contains "test": fromshshshimportI,IZforfilenameinI>>"ls"|"grep test":print(filename)# zero mode, split line by "\x00"forfilenameinIZ>>"ls"|"grep test":print...
Dampingreatmentsaveeen extensivelyseds powerfuleanso damputtructuralesonant vibrations.sually, dampingaterialsreullyoverednheurfacef plates.he drawbacksfhi... L Zheng,R Xie,Y Wang,... - 《Shock & Vibration》 被引量: 47发表: 2011年 A SSESSMENT OF N ATIONALLY R EGISTERED E MERGENC...
# It contains the one file "frag.ksh" # To extract contents, type # sh file # if [ –f frag.ksh ] then echo frag.ksh exists: will not overwrite else echo extracting frag.ksh sed 's/^X//' >frag.ksh <<_EOF_ X# This is frag.ksh X# Not very interesting, really. Xecho frag...