It is line4. It is line5.Use the sed command to remove blank lines and lines with whitespace characters from the specified text file in bash and write the output to the original file.Use sed Command 1 2 3 4 sed -i '/^[[:space:]]*$/d' file.txt echo -e "The contents of ...
# 验证行数是否正确if[ $line -gt $count ]thenecho"too much lines"exitfifrom=$(($count-$line+1))echo"all lines:$count, you want delete:$line, from:$from"sed-i"${from},\$d"ccecho"after deleting:"catcc 验证: ./test.sh3输出:+ line=3+cat+echo'before deleting'before deleting+cat...
inputrc文件的大概样子像下面这样: ## 本例来自CentOS6.4的默认配置文件$if mode=emacs# for linux console and RH/Debian xterm"/e[1~":beginning-of-line"/e[4~":end-of-line# commented out keymappings for pgup/pgdown to reach begin/end of history#"/e[5~": beginning-of-history#"/e[6~":...
Grep stands for Global Regular Expression Print. We can easily remove the Bash lines with the grep command, another built-in tool in Bash. A provided file's text and strings are searched, and the program outputs every line that meets a pattern. You can use this technique to delete the em...
Clone your owned gists and starred gists as git repos, and Fetch/Create/Edit/Delete them with Github API. It also supports quick search with hashtag and contents. For more information, please go through the guide Written by: typebrook Lyrics Grab lyrics for a given song quickly from the ...
"\e[3~":delete-char "\e[2~":quoted-insert "\e[5C":forward-word "\e[5D":backward-word "\e[1;5C":forward-word "\e[1;5D":backward-word # for rxvt "\e[8~":end-of-line "\eOc":forward-word "\eOd":backward-word # for non RH/Debian xterm, can't hurt for RH/DEbian xter...
ldapdelete(1) ldaplist(1) ldapmodify(1) ldapmodrdn(1) ldapsearch(1) ldd(1) lefty(1) less(1) lessecho(1) lesskey(1) let(1) lex(1) lftp(1) lftpget(1) lgrpinfo(1) libgd2(1) libnetcfg(1) libtool(1) libtoolize(1) limit(1) line(1) link(1g) links(1) list_devices(1) ...
bash 别名( alias)只不过是指向命令的快捷方式而已。alias 命令允许用户只输入一个单词就运行任意一个命令或一组命令(包括命令选项和文件名)。执行 alias 命令会显示一个所有已定义别名的列表。你可以在 ~/.bas…
The dreaded rm -rf / command deletes every file on an entire drive. It works by recursively deleting all the subdirectories of root and their subdirectories. The -f (for "force") flag compounds the problem by suppressing prompts. Don't do this....
Python，perl，C++ bash:脚本解释器 编程能力： 脚本编程 变量：内存空间，命名的内存空间（可以...