[問題]一些指令問題

[hotdog5478 (Anson)]

小弟最近初學遇到一題不知道怎解

題目是這樣的

Student wants to display 1 to 1000 numbers with an expansion of 2.Meaning
the output should be:1 3 5 7 9 11...Student dont know to write a script.
Please help him with a single command to display this.
Repeat the same to display all alphabets with expansion of 4 so as to display
A       E       I       M
…
請大家指導一下

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推 kenduest: man seq
→ nullspace: bash -c "echo {1..1000..2}"
→ nullspace: bash -c "echo {A..Z..4}"
→ kenduest: bash 沒有 {1..100..2} 這類語法吧，ksh 才支援
→ kenduest: 不過剛剛看了一下，bash 4.x 有支援沒錯
→ kenduest: 我被手上跑的 bash 3.x linux server 騙了:~
→ kerwinhui: 還在用bash3不怕shellshock？
→ kerwinhui: 不過的確bash4加了很多features
→ danny8376: centos5的bash還是bash3.2啊 不過有打過patch了XD